Relevant bibliographies by topics / Quasi-static process

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
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Academic literature on the topic 'Quasi-static process'

Author: Grafiati
Published: 30 May 2022
Last updated: 22 June 2025

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Journal articles on the topic "Quasi-static process"

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Kitsunezaki, S., and A. Kurumatani. "The Creation Process of Faults in Quasi-static Deformation." Granular Matter 5, no. 4 (2004): 185–92. http://dx.doi.org/10.1007/s10035-003-0150-x.

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Pavelko, Vitalijs. "On the Crack Quasi-Static Growth." Key Engineering Materials 827 (December 2019): 312–17. http://dx.doi.org/10.4028/www.scientific.net/kem.827.312.

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The theoretical model of quasi-static crack growth in the elastic-plastic material under load variation in a wide range. Small-scale yielding is principal assumption and main restriction of proposed theory. The model of crack growth provides for continues and interrelated both the crack propagation and plastic deformation development. The nonlinear first-order differential equation describes the quasi-static process of crack growth. In dimensionless form this equation invariant in respect to geometrical configuration and material. The critical size of the plastic zone is proposed as the characteristics of material resistance which is directly connected with the fracture toughness, but more convenient in practical applications of invariant equation. The demonstration of solution is performed for the double cantilever beam that widely used as the standard (DCB) sample for measurement of the mode-I interlaminar fracture toughness. he short analysis of some properties of solution of the invariant equation and its application is done.
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Messelmi, Farid, Abdelbaki Merouani, and Hicham Abdelaziz. "Quasi-Static Linear Thermo-Viscoelastic Process with Irregular Viscous Dissipation." Advances in Applied Mathematics and Mechanics 9, no. 4 (2017): 924–43. http://dx.doi.org/10.4208/aamm.2014.m656.

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AbstractWe consider a mathematical model which describes the quasi-static evolution of a thermo-viscoelastic linear body with taking into account the effects of internal forces which generate a non linear viscous dissipative function. We derive a variational formulation of the system of equilibrium equation and energy equation. An existence result of weak solutions was obtained in an appropriate function space.
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Cui, Xiaohui, Zhiwu Zhang, Hailiang Yu, Xiaoting Xiao, and Yongqi Cheng. "Springback Calibration of a U-Shaped Electromagnetic Impulse Forming Process." Metals 9, no. 5 (2019): 603. http://dx.doi.org/10.3390/met9050603.

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A three-dimensional (3D) finite-element model (FEM), including quasi-static stamping, sequential coupling for electromagnetic forming (EMF) and springback, was established to analyze the springback calibration by electromagnetic force. Results show that the tangential stress at the sheet bending region is reduced, and even the direction of tangential stress at the bending region is changed after EMF. The springback can be significantly reduced with a higher discharge voltage. The simulation results are in good agreement with the experiment results, and the simulation method has a high accuracy in predicting the springback of quasi-static stamping and electromagnetic forming.
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Sun, De Qiang, Yan Feng Guo, and Guo Tu Xu. "In-Plane Crushing of Triangular Honeycomb Cores, Part I: Under Quasi-Static Loadings." Advanced Materials Research 476-478 (February 2012): 2501–4. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.2501.

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Mechanical behaviors of triangular honeycombs cores (THCs) are investigated by using the finite element (FE) simulations under the in-plane quasi-static crushing loadings. The deformation process is described in the form of response curves and deformation mode diagrams. The force-displacement curves include four deformation regimes with distinct characteristics. The quasi-static plateau stresses are calculated for the THCs with different configuration parameters. The influences of ratio of cell wall thickness to edge length and expanding angle on the quasi-static plateau stress are discussed in detail. The quasi-static plateau stress is proportional to the relative density of THCs and the expanding angle determines the scale coefficient. The empirical formula of quasi-static plateau stress in terms of ratio of cell wall thickness to edge length and expanding angle is given based on the FE simulation results.
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Thomas, Mathew S., Demetra Z. Adrahtas, C. Daniel Frisbie, and Kevin D. Dorfman. "Modeling of Quasi-Static Floating-Gate Transistor Biosensors." ACS Sensors 6, no. 5 (2021): 1910–17. http://dx.doi.org/10.1021/acssensors.1c00261.

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Ogorelkov, Dmitriy, Vladimir Mironov, and Olga Lukashuk. "Durability of metal structures under quasi-static load." MATEC Web of Conferences 224 (2018): 02091. http://dx.doi.org/10.1051/matecconf/201822402091.

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Failure of materials and structures is one of unresolved problems of mechanics. This paper offers an approximate approach to assessing durability of products on the basis of a mechanical experiment. The experiment represents the fatigue process as a transition of a plastic material into its brittle state. A simplified physical model – which could be used to build a mathematical model of fatigue process – hangs on a local transition of a plastic material into its brittle state. The calculation methodology includes both an original part on cyclic degradation of material strength and correlations based on experiments and checked by design routines. Two approaches to calculating the durability of a randomly-loaded object are compared: using the equation of cyclic degradation of strength and the rule of linear summation of fatigue damages. The results obtained are useful for improving methodologies of calculating service life or durability of structures.
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Yan, Kun, Shiyou Wu, and Guangyou Fang. "Detection of Quasi-Static Trapped Human Being Using Mono-Static UWB Life-Detection Radar." Applied Sciences 11, no. 7 (2021): 3129. http://dx.doi.org/10.3390/app11073129.

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In practical situations such as hostage rescue, earthquake and other similar events, the ultra-wideband (UWB) life-detection radar echo response from the respiration motion of the trapped person is always quasi-/non-periodic in respiration frequency or very weak in respiration amplitude, which can be called quasi-static vital sign. Although it is an extremely difficult task, considering the economic cost, the detection ability of the traditional UWB life-detection radars with only a pair of transceiver antennas is desired to be enhanced for locating the quasi-static trapped human being. This article proposes two different detection methods for quasi-static trapped human beings through the single/multiple observation points, which corresponds to the single-/multi-station radar operating mode, respectively. Proof-of-principle experiments were carried out by our designed radar prototypes, validating the effectiveness of the proposed methods.
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Zhu, Hongwei, Yaodong Feng, Danfeng Lu, et al. "Dynamics of quasi-static collapse process of a binary granular column." Powder Technology 339 (November 2018): 970–73. http://dx.doi.org/10.1016/j.powtec.2018.08.051.

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Pan, Bei-Cheng, Qing-Fan Shi, and Gang Sun. "Experimental Observation of Quasi-Static Avalanche Process of a Granular Pile." Chinese Physics Letters 30, no. 12 (2013): 124701. http://dx.doi.org/10.1088/0256-307x/30/12/124701.

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Dissertations / Theses on the topic "Quasi-static process"

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Vohnout, Vincent J. "A hybrid quasi-static/dynamic process for forming large sheet metal parts from aluminum alloys /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487952208106469.

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Swan, Matthew Scot. "Constitutive Modeling of the Densification Process of Ceramic Powders Subjected to Cold, Quasi-Static Pressing." Doctoral thesis, Università degli studi di Trento, 2017. https://hdl.handle.net/11572/368159.

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The consistent, uniform pressing of green bodies is a necessary part of producing high-quality, high-performance ceramics with predictable qualities and behavior. Undesirable density variation in the compacted ceramic powder causes variability in performance, failure to meet quality control standards, and, possibly, complete piece failure during successive processing. These issues contribute directly to a decrease in production efficiency through lost time and an increase in energy and material use. The careful control of the green body density field is of the utmost importance to consistently producing high-performance ceramics. Current methods for minimizing heterogeneity of the density field are often based on trial-and-error to optimize mold geometry and forming pressure, which is both expensive and prolongs development. The present research presents a continuum-level constitutive model for accurately modeling the densification of ceramic powders into green bodies and outlines the numerical implimentation of said model. The constitutive model incorporates nonlinear elasticity, elatic-plastic coupling, cap evolution, pressure- and Lode angle-dependent plasticity, and hardening. To evaluate the constitutive model, a new method for measuring density in green bodies has been developed. This method utilizes readily-available laboratory equipment to produce density projection data for the sample and subsequently processes that data to produce a 3D density field using well-developed tomographic reconstruction techniques. Finally, a green body is produced from alumina powder (Martoxid KMS-96) and the density field is evaluated and compared to that of a numerical simulation. They are shown to agree within the error of the density measurements. These comparisons demonstrate the performance of the developed constitutive model and the potential utility for companies and research institutions that are in the ceramics production field.
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Swan, Matthew Scot. "Constitutive Modeling of the Densification Process of Ceramic Powders Subjected to Cold, Quasi-Static Pressing." Doctoral thesis, University of Trento, 2017. http://eprints-phd.biblio.unitn.it/2013/1/thesis_with_cover.pdf.

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The consistent, uniform pressing of green bodies is a necessary part of producing high-quality, high-performance ceramics with predictable qualities and behavior. Undesirable density variation in the compacted ceramic powder causes variability in performance, failure to meet quality control standards, and, possibly, complete piece failure during successive processing. These issues contribute directly to a decrease in production efficiency through lost time and an increase in energy and material use. The careful control of the green body density field is of the utmost importance to consistently producing high-performance ceramics. Current methods for minimizing heterogeneity of the density field are often based on trial-and-error to optimize mold geometry and forming pressure, which is both expensive and prolongs development. The present research presents a continuum-level constitutive model for accurately modeling the densification of ceramic powders into green bodies and outlines the numerical implimentation of said model. The constitutive model incorporates nonlinear elasticity, elatic-plastic coupling, cap evolution, pressure- and Lode angle-dependent plasticity, and hardening. To evaluate the constitutive model, a new method for measuring density in green bodies has been developed. This method utilizes readily-available laboratory equipment to produce density projection data for the sample and subsequently processes that data to produce a 3D density field using well-developed tomographic reconstruction techniques. Finally, a green body is produced from alumina powder (Martoxid KMS-96) and the density field is evaluated and compared to that of a numerical simulation. They are shown to agree within the error of the density measurements. These comparisons demonstrate the performance of the developed constitutive model and the potential utility for companies and research institutions that are in the ceramics production field.
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Pihnastyi, O. M., G. K. Kozhevnikov, and Tetiana Bondarenko. "The information controlling model transport system during transient conditions." Thesis, Institute of Electrical and Electronics Engineers, Inc., USA, 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48796.

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This article is devoted to designing an information management system for the conveyor line of mining enterprises. The analytical design method for the transient mode of the stepped speed control system of the conveyor line was developed. The partial differential equation was used in constructing the conveyor line model. The description of the production system is fulfilled in the single step approximation. A decision was obtained which determines the state of the parameters of the production line for a technological position specified as a function of time. Has been determined the length of the transition period during which the initial condition for the distribution of labour objects along the conveyor affects the parameters of the state of the conveyor line. The method for calculating the current parameters of a conveyor line with the use of partial differential equations allows the design of control systems for production lines of conveyor type for transient modes. The originality of the results obtained is to improve the PDE-models of the conveyor-type production systems used to design highly efficient production control systems operating in transient modes.
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Пигнастый, Олег Михайлович, та Виктор Яковлевич Заруба. "Задачи программного управления параметрами поточной линии с использованием сверхурочных работ". Thesis, ЦНИИ "Электроприбор", 2012. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42004.

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Рассмотрены основные элементы технологического процесса. Показана их взаимосвязь между собой в ходе движения предмета труда по технологическому маршруту. Детально рассмотрено техническое содержание задачи управления параметрами технологического процесса через сверхурочные работы. Представлена модель управления параметрами технологического процесса, основанная на статистических балансовых уравнениях для макропараметров технологического процесса. Поставлена задача программного управления параметрами технологического процесса.
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Hussien, Abdou Mekky Mousa. "Ionization of diatomic molecules in intense laser fields." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17323.

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In dieser Arbeit wurde die Ionisation einiger zweiatomiger Moleküle (H2, N2 und O2) in intensiven Laserfeldern untersucht. Hierbei wurden verschiedene Modelle zur Beschreibung der Tunnelionisation sowohl untereinander als auch mit der Lösung der zeitabhängigen Schrödingergleichung (TDSE) verglichen. Die kernabstandsabhängige Ionisationswahrscheinlichkeit wurde für verschiedene Intensitäten betrachtet und die Gültigkeit modifizierter atomarer bzw. Molekularer Modelle zur Beschreibung der Tunnelionisation analysiert. Es wurde herausgefunden, dass Modelle, die auf der quasistatischen Näherung beruhen (wo die Ionisation unabhängig von der Frequenz des Laserfeldes ist), nur in einem kleinem Frequenz- und Intensitätsbereich hinreichend genaue Ergebnisse liefern, dem Tunnelregime. Modelle mit einem frequenzabhängigen Faktor stimmen hingegen sowohl im Tunnel- als auch im Mehrphotonenregime mit den genaueren TDSE Ergebnissen überein. Weiterhin wird auch die Abweichung zur Franck-Condon Näherung verdeutlicht. Es wurde ein kleiner Einfluss auf die Revival-Zeit des im Wasserstoffmolekül-Ion gestarteten Wellenpakets gefunden. Die Berücksichtigung von Bond-Softening führt weiterhin zu einer Verringerung der Revival-Zeit mit steigender Spitzenintensität des Lasers. Außerdem wird die Anisotropie der Ionisation von H2 als Funktion der Laserintensität in linear und zirkular polarisiertem Licht mit dem molekularen Tunnelmodell MO-ADK untersucht. Gute Übereinstimmung mit den experimentellen Beobachtungen wurde gefunden, insbesondere wenn der Effekt des Fokusvolumens des Laserfeldes berücksichtigt wird. Die Anwendbarkeit des Zwei-Zentren-Modells auf größere Moleküle, N2 und O2, wird ebenfalls getestet. Es wird beobachtet, dass dies für N2 (symmetrisches HOMO) funktioniert, für O2 (asymmetrisches HOMO) jedoch nicht.<br>The ionization of some diatomic molecules, H2, N2, and O2, exposed to intense laser fields has been studied by comparing various molecular tunneling–ionization models with each other and with the numerical solution of the time-dependent Schrödinger equation (TDSE). The internuclear-distance dependent ionization yields over a wide range of laser peak intensities are investigated and the validity of the modified atomic and molecular tunneling models is examined. It is found that those models that depend on the quasi-static approximation, where ionization is independent on the oscillation frequency of the applied laser field, are useful for laser-induced ionization processes in only a very small region of the frequency and intensity domain of laser fields, i.e. in the tunneling regime. The models that include a frequency dependent factor are in a good agreement with the accurate TDSE calculations in both the multiphoton and the tunneling ionization regimes. Furthermore, the deviation from Franck-Condon-like distribution is also clarified. A small effect on the revival time of the vibrational wavepacket of hydrogen molecular ion, due to this deviation, has been found. Consideration of the bond-softening effect leads to a decrease in the revival time with increasing laser-peak intensity. The anisotropy of H2 as a function of laser intensity in linear and circular polarized fields using molecular tunneling model (MO-ADK) are also studied and a good agreement with the experimental observations, especially if the focal volume of the laser field is considered, has been obtained. The applicability of the two-center model for larger molecules, N2 and O2, is tested. It is found that it works with N2 (symmetric HOMO) but fails in O2 (ansymmetric HOMO).
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Fu, Chi-Chun, and 傅啟淳. "Reversible folding of hen egg white lysozyme by a quasi-static process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/70010749769756139645.

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碩士<br>朝陽科技大學<br>應用化學系碩士班<br>94<br>In terms of the first-order-like state transition model, we study the folding process of the egg white lysozyme by the nuclear magnetic resonance technique, and try to find out its folding core. By adjusting the concentrations of urea, DTT and other chemical reagents, the egg white lysozyme, beginning from the denaturated state, goes through an overcritical reaction path to the native conformation step by step. The characteristic of different stages in the folding process is monitored by measuring the chemistry shift indexes, the NOE signals of the backbone amino protons and α-protons, and the hydrogen-deuterium exchange rate. The result reveals that the structure of the unfolded state of lysozyme is very weak. Bringing down the concentration of DTT will induce the formation of helix conformation, further lowering the concentration of urea will stabilize the helix conformation. While urea is completely removed from the solution, β -sheet structure appears in the segment of lysozyme with sequence number from 39 to 60. However, the effect of the pH value and concentration of mannitol on the protein conformation is not obvious. According to the NMR spectroscopy, the segments C6~G22 and N2 ~F34 of the egg white lysozyme present stable helix conformation in each middle status from the unfolded state to the native conformation. Together with the result of the dynamic light scattering experiment, it is inferred that these two segments, C6~G22 and N27~F34, should be the initiating location of the folding of the egg white lysozyme.
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cheng, Yeh-Xu, and 葉旭成. "Reversible folding of lysozyme by a quasi-static process: A first-order-like state transition." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/53677346481453857105.

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碩士<br>國立東華大學<br>應用物理研究所<br>92<br>A first-order-like state transition model is considered to be a global reaction mechanism to directly fold protein from unfolded state to its native form. In order to more well studied verify the general applicability of this mechanism, a model protein, lysozyme, was fully unfolded by 4.5 M urea, 0.1 M dithiothreitol (DTT) in pH 3 and then refolded to its native form by way of an overcritical reaction path (a quasi-static process) or by crossing over a transition boundary directly (a direct dilution process). Within this study, lysozyme was trapped in a glassy state through a direct folding path, and can be folded into its native state by further increase of the concentration of lysozyme by micro-cone. This indicated that a state transition line or boundary may exist during the direct folding path. However, lysozyme can be continuously folded from unfolded to native state by an overcritical reaction path. Four stable folding intermediates and the native lysozyme were obtained and then secondary structures, particle size distribution, thermal stability and oxidation state of disulfide bonds were analyzed by circular dichroism (CD) spectroscopy, dynamic light scattering (DLS), differential scanning calorimetry (DSC) and Raman spectroscopy, respectively. According to the results, intermediates of both reaction paths follow the theme of collapse, sequential and first-order-like state transition model. This indicated that protein folding under different reaction paths might follow the same folding mechanism. Namely, the mechanism that is revealed by overcritical folding intermediates may represent the true mechanism of protein folding. A protein folding reaction mechanism was postulated and discussed. In spite of the global interaction mechanism, the fact that an α-helix is formed prior to the β-sheet may indicate that the protein folding is initiated by local interactions.
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Books on the topic "Quasi-static process"

1

Goldberg, B. Quasi-static probabilistic structural analyses process and criteria. National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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Goldberg, B. Quasi-static probabilistic structural analyses process and criteria. National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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Goldberg, B. Quasi-static probabilistic structural analyses process and criteria. National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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Goldberg, B. Quasi-static probabilistic structural analyses process and criteria. National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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V, Verderaime, George C. Marshall Space Flight Center., and United States. National Aeronautics and Space Administration., eds. Quasi-static probabilistic structural analyses process and criteria. National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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Butusov, Oleg, and Valeriy Meshalkin. Fundamentals of informatization and mathematical modeling of ecological systems. INFRA-M Academic Publishing LLC., 2023. http://dx.doi.org/10.12737/1477254.

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The concept, theory and methodological foundations of environmental informatics are presented, the tools of informatization and digitalization of technogenic-natural systems are described, methods of mathematical modeling of ecological systems in industrial areas are considered. The main methods of ecological informatics, methods of mathematical and computer modeling of quasi-static (long-term) dynamics of ecosystems are described. The theoretical foundations of calculating the "dose-effect" dependencies as the main indicators of the degree of impact of industrial emissions on the environment are presented. The results of practical application of mathematical models of woodlands are given. The purpose and architecture of decision support systems for environmental protection are described; the principles of automated organizational and managerial decision-making to reduce emissions of hazardous chemicals into the atmosphere are outlined.&#x0D; Meets the requirements of the federal state educational standards of higher education of the latest generation.&#x0D; For undergraduates and undergraduates studying in the field of training "Energy- and resource-saving processes of chemical technology, petrochemistry and biotechnology". It can also be used by undergraduates and undergraduates studying in the areas of training "Technosphere safety" and "Organization and management of high-tech industries".
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National Aeronautics and Space Administration (NASA) Staff. Quasi-Static Probabilistic Structural Analyses Process and Criteria. Independently Published, 2018.

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Book chapters on the topic "Quasi-static process"

1

Sadowski, T. "Modelling of Semi-Brittle Ceramics Behaviour under a Quasi-Static Deformation Process." In Solid Mechanics and Its Applications. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8494-4_38.

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Zhou, Hongyu, Juxin Guo, Qi Tang, and Haoda Wang. "Research on Cumulative Damage of Quasi-Static Reinforced Concrete Short Columns with Low Cycle Fatigue." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_41.

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AbstractColumns are the main load-bearing elements in many structures, but with the advancement of service time, damage to reinforced concrete columns before reaching their design service life occurs from time to time. In this experiment, the cumulative damage of reinforced concrete short columns is investigated by using the research method of proposed static structural test. Through the low-week fatigue proposed static test of reinforced concrete short columns, the changes in the process are analyzed, and the changes in physical quantities such as cracks, strains, and deflections are recorded to study the shear damage characteristics of fatigue of reinforced concrete short columns, the damage mechanism, and the mechanical properties of the members such as the load carrying capacity after the damage.
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Huon, Vincent, Bruno Cousin, and Olivier Maisonneuve. "Study of Thermal and Kinematic Phenomena Associated with Quasi-static Deformation and Damage Process of some Concretes." In Novel Approaches in Civil Engineering. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-45287-4_14.

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Diestmann, Thomas, Nils Broedling, Benedict Götz, and Tobias Melz. "Surrogate Model-Based Uncertainty Quantification for a Helical Gear Pair." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77256-7_16.

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AbstractCompetitive industrial transmission systems must perform most efficiently with reference to complex requirements and conflicting key performance indicators. This design challenge translates into a high-dimensional multi-objective optimization problem that requires complex algorithms and evaluation of computationally expensive simulations to predict physical system behavior and design robustness. Crucial for the design decision-making process is the characterization, ranking, and quantification of relevant sources of uncertainties. However, due to the strict time limits of product development loops, the overall computational burden of uncertainty quantification (UQ) may even drive state-of-the-art parallel computing resources to their limits. Efficient machine learning (ML) tools and techniques emphasizing high-fidelity simulation data-driven training will play a fundamental role in enabling UQ in the early-stage development phase.This investigation surveys UQ methods with a focus on noise, vibration, and harshness (NVH) characteristics of transmission systems. Quasi-static 3D contact dynamic simulations are performed to evaluate the static transmission error (TE) of meshing gear pairs under different loading and boundary conditions. TE indicates NVH excitation and is typically used as an objective function in the early-stage design process. The limited system size allows large-scale design of experiments (DoE) and enables numerical studies of various UQ sampling and modeling techniques where the design parameters are treated as random variables associated with tolerances from manufacturing and assembly processes. The model accuracy of generalized polynomial chaos expansion (gPC) and Gaussian process regression (GPR) is evaluated and compared. The results of the methods are discussed to conclude efficient and scalable solution procedures for robust design optimization.
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Magri, Paolo, Marco Gadola, Daniel Chindamo, Giulia Sandrini, and Andrea Candela. "A Comprehensive Method for Computing Suspension Elasto-kinematics With Non-linear Compliance." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_48.

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AbstractSince flexible bushings are used as the interface between the suspension arms and the chassis, the extra degrees of freedom make the design process a complex task. While the use of a multi-body model is common practice in the industry, a dedicated computational tool can be more practical and straightforward, especially when undertaking the design of a new suspension concept from the ground up. This paper presents a quasi-static method for calculating suspension compliance under the action of forces and moments, enabling real-time simulations. The algorithm proposed in this paper was devised with a threefold purpose: integrating elasto-kinematics into the kinematic design tool previously created by the authors, integrating real-time vehicle dynamics simulation, and overcoming the limitations of the traditional approach based on the superposition principle. Finally, a comparison of the proposed model with one based on the lookup-table and superposition principle is presented.
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Abrosimov, Nikolaii A., Aleksandr V. Elesin, and Leonid Igumnov. "Computer Simulation of the Process of Loss of Stability of Composite Cylindrical Shells Under Combined Quasi-static and Dynamic Loads." In Advanced Structured Materials. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53755-5_9.

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Matyukhin, Yu G., and V. M. Tomozov. "The Quasi-Static Evolution of Magnetic Structures on the Sun and their Topological Reconstruction." In Basic Plasma Processes on the Sun. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0667-9_62.

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Fukuyama, Eiichi, Chihiro Hashimoto, and Mitsuhiro Matsu’ura. "Simulation of the Transition of Earthquake Rupture from Quasi-static Growth to Dynamic Propagation." In Earthquake Processes: Physical Modelling, Numerical Simulation and Data Analysis Part I. Birkhäuser Basel, 2002. http://dx.doi.org/10.1007/978-3-0348-8203-3_10.

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Hoang N.-H., Langseth M., Porcaro R., and Hanssen A.-G. "Behaviour and Modelling of Aluminium self-piercing Riveted Connections." In New Frontiers in Light Metals. IOS Press, 2010. https://doi.org/10.3233/978-1-60750-586-0-471.

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In the present paper, the self-piercing riveting process by using an aluminium rivet to connect two aluminium plates was investigated. Aluminium in alloys 7108-T5 and 7278-T6 were chosen as rivet materials, while plate material was the alloy 6060 in W temper. Numerical analyses of the riveting process were also carried out by means of a 2D-axisymetric model. It transpired that the 2D model was able to predict the riveting process as well as the force-displacement behaviour with a reasonable accuracy. The mechanical behaviour of aluminium self-piercing riveted connections under quasi-static loading connections was also investigated experimentally. The strength of connections using aluminium rivets was finally compared with that of using steel rivets. The comparison showed that aluminium riveted joints can provide a good static strength in comparison with the steel ones.
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Meyer Tino, Sherratt Paul, Harland Andy, Haworth Barry, Holmes Chris, and Lucas Tim. "Injection Moulding &ndash; Properties Customisation by Varying Process Conditions." In Advances in Transdisciplinary Engineering. IOS Press, 2016. https://doi.org/10.3233/978-1-61499-668-2-43.

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The process of injection moulding (IM) is one of the most widely employed methods for manufacturing an extremely diverse range of polymeric parts of varying size and complexity. To match the final application requirements a base material is often modified by certain additives to enhance the material performance. However, the objective of the current research is to explore the effect of different process parameters on the toughness properties of IM polyamide (PA) materials with the aim of customizing the material to meet specific needs. Material suppliers provide their customers with discrete values regarding the mechanical properties, but they only suggest broad windows when specifying processing conditions like the melt temperature. Test samples produced within, as well as below and above the recommendations were produced and tested regarding their quasi-static tensile and instrumented impact behaviour, showing significant differences in performance.
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Conference papers on the topic "Quasi-static process"

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Shi, Danrong, Jian Feng, Jin Zhang, and Jianguo Cai. "Quasi-static crushing behaviour of a novel re-entrant circular star- shaped auxetic honeycomb." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.3370.

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&lt;p&gt;The study focuses on a new honeycomb configuration called re-entrant circular star-shaped honeycomb (RECSH), designed to improve energy absorption. This is achieved by replacing the horizontal cell walls of a regular re-entrant honeycomb (REH) with crossed inclined walls and adding a circular structure. The use of these cell walls allows for greater dissipation of energy during the crushing process. The numerical investigation of quasi-static crushing response in RECSH under large deformation is studied. The results showed that applying a quasi-static force can cause the RECSH to undergo two distinct stages characterised by a plateau, attributed to the supportive influence of the circular structure. Parametric analyses revealed that the circular radius of the unit cell significantly impacts the crushing strength and deformation modes of the RECSH. Comparing the RECSH to the conventional REH with the same wall thickness, the RECSH demonstrated enhanced strength and energy absorption capabilities, with improvements of 504.3% and 146.29% in average plateau stress and specific energy absorption, respectively.&lt;/p&gt;
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Wang, Y., J. A. Wharton, J. Downes, and R. A. Shenoi. "Marine Structural Integrity Subject to Mechano-electrochemical Induced Corrosion." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09656.

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Abstract Carbon steel marine platforms, including ships and offshore structures, are at high risk of corrosion due to the combination of aggressive seawater environment, corrosive cargoes and constantly changing loading conditions. In particular, the combined influence of mechanical and electrochemical effects (which is often termed mechano-electrochemistry) has gained increasing attention over the last decade. Although various experiments, along with theoretical/empirical expressions, have been proposed to establish the relationship between stress/strain and the corrosion behavior, there are few in situ measurements of corrosion and the mechanical properties. Moreover, such corrosion mechanisms have not been incorporated for large scale ship or offshore structural members. This work has developed an experimental protocol including in situ potentiostat and quasi-static tensile tests to provide an improved understanding of the corrosion behavior of UNS G10210 steel at different stress levels. A novel local-global finite element method has been proposed to model a steel plate at a ship compartment scale under uniaxial quasi-static tensile/compressive loading. The stress distributions together with the experimental measurements were utilized to simulate a local mechano-electrochemical corrosion process and predict the stress-induced corrosion rate change. The modeling results demonstrate a more realistic approach to estimate marine structural integrity considering stress-induced localized corrosion.
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Shah, Aarohi, Katelyn Gunderson, Julian Rimoli, and Massimo Ruzzene. "Closed Loop Approach to Structural Health Monitoring of Critical Rotorcraft Components." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12888.

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We present a model-based structural health monitoring approach to mitigate fatigue damage of critical rotorcraft components in real time. The overall concept is demonstrated with aerodynamic loads for a utility helicopter similar to the UH-60 Black Hawk and a structural model of the main rotor's pitch link. The potential of reducing computational costs associated with modeling by utilizing a quasi-static analysis was considered in this study, however, it was concluded that a dynamic analysis was indeed necessary to accurately capture the inertial effects of the vehicle. Maximum stress results extracted from the model can be sent to a controller to apply a load alleviation control scheme to appropriately modify the input to the rotorcraft controls and reduce air loads to the vehicle. The modeling, analysis, and load alleviation process were also automated. We also completed an investigation into the impact of vehicle control input parameters on stress experienced by the component.
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Campolo, Domenico, and Franco Cardin. "Quasi-Static Mechanical Manipulation as an Optimal Process." In 2023 62nd IEEE Conference on Decision and Control (CDC). IEEE, 2023. http://dx.doi.org/10.1109/cdc49753.2023.10383481.

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"Quasi-static Process Modelling of Deep Cold Rolling on Ti-6Al-4V." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-2.

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YEOM, CHAN, and ANTHONY VIZZINI. "Quasi-static analysis of peeling process using geometrically nonlinear finite element model." In 32nd Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1004.

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Pająk, Małgorzata, and Jacek Janiszewski. "Steel fibre reinforced self-compacting concrete subjected to quasi-static and dynamic loading conditions." In 3RD NATIONAL CONFERENCE ON CURRENT AND EMERGING PROCESS TECHNOLOGIES – CONCEPT 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0007804.

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Underwood, James, Erick Alley, Jerolim Andric, et al. "Committee II.1: Quasi-Static Response." In 21st International Ship and Offshore Structures Congress, Volume 1. SNAME, 2022. http://dx.doi.org/10.5957/issc-2022-committee-ii-1.

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Committee Mandate Concern for the quasi-static response of ship and offshore structures, as required for safety and serviceability assessments. Attention shall be given to uncertainty quantification of quasi-static load and response analysis approaches, and their limitations, including exact and approximate methods for derivation of different acceptance criteria. Introduction In the design of ship and offshore structures, Naval Architects and Structural Engineers require access to a wide range of analysis methods to successfully progress from concept brief through to a production ready design, that will safely operate for the duration of its service life. Significant development in computational analysis techniques have occurred over the preceding decades, coupled with increased availability of high-performance computing; however, computationally intensive methods regularly do not fit the requirements of a design team, particularly in the early design phases. Whilst some quasi-static methods may have arisen at times of lesser computational capabilities, quasi-static analysis methods remain relevant, providing an appropriate balance between accuracy and speed, often having an ability to provide a quick result based on minimal input data, facilitating rapid design iteration. In ship and offshore structures, the loading, whether local or global, is predominantly caused by a dynamic motion that is cyclic or oscillating, for example the wave loading of a ship hull girder in a seaway, the sloshing loading due to the motions of fluid in a tank, the loading on a deck or equipment foundation, etc. True dynamic analysis of such scenarios is complex and time consuming to undertake, and often can’t be successfully completed until the structural design details are in a progressed state. Therefore, quasi-static methods implementing a simplified approach that resembles the scenario, whether through a defined loading or to induce a seemingly equivalent structural response, have been developed. Not all loading scenarios can be suitably represented by quasi-static methods, particularly where loading is complex or structural response of the individual parts of the system may interact. However, where a quasi-static method can be implemented to develop a structure with sufficient reserve to facilitate safe operation, the benefits to the design process can be significant. In structural response analysis, a method may be considered to be quasi-static where the effects of structural dynamics (structural inertia and damping) may be neglected. In this regards the time component, or time derivatives, may be neglected. To adopt a quasi-static method, the true time dependant loading must be sufficiently slow in relation to the structural response not to coincide with resonant response frequencies. Due to this ‘slow’ progression, during analysis the system may be considered to be in static equilibrium at all time instances. These points are true for many quasi-static analyses, where loading may be through incremental application of force or displacement to a structure, and static equilibrium of the system is achieved before the next increment is applied. Therefore, time associated with the loading is only implied and not explicitly included in the assessment. In other words, the structural responses at any time instant will be only determined by the loads at that time instant, and the structural responses have no memory effect. Whilst the applied loading may be incremental, it need not be entirely linear, and in the same regard the structural response also need not be linear. For example, the loading and response could be coupled, such that as the structure deforms the load is iterated to reflect the new state of the system. However, in the application of quasi-static methods, the relative accuracy and therefore suitability of the method should always be considered. Quasi-static analysis covers a broad spectrum of methods from hand calculations to finite element analysis (FEA) and may even combine methods such as computational fluid dynamics (CFD). The methods may be used directly for structural assessment, or as part of broader method, such as the input to a reliability analysis or optimisation routine, or to derive a peak stress or stress sequence for fatigue assessment. For this reason, there may be perceived overlap between this and other ISSC committees. However, this committee has specifically focussed the presented report around methods that are quasi-static in nature, including where the topics, such as fatigue, ultimate and accidental limit states, that are covered in depth from a different perspective by other ISSC Technical Committees.
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Aniszewska, Dorota, and Marek Rybaczuk. "Exploring process of fibre breaking in tube samples of composite during quasi-static process of fracture." In Selected Papers from the 3rd Chaotic Modeling and Simulation International Conference (CHAOS2010). WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814350341_0011.

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Krovvidi, Sai C., M. Ramulu, and Per G. Reinhall. "Numerical Study of the Percussive Riveting Process: Simulation Results." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24096.

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Abstract Percussive riveting is a widely used assembly method in the aerospace industry. The joints produced using this technique have consistently high fatigue strength. It is a manual assembly technique but automation has been introduced in certain instances on the work floor to assist assembly workers. In this paper, study was set up to analyze the effect of important geometric parameters on the residual stress and strain distributions within the riveting stackup. In the current paper, a realistic set of boundary conditions have been adopted with both movable riveting die and movable bucking bar in an axisymmetric thermomechanical model that has a countersunk rivet. The knowledge of this evolution is important to gain understanding of the differences between quasi-static squeeze riveting process and the percussive riveting process. The distribution of residual strains and stresses play an important role in influencing the fatigue strength of the assembled joined. Most if not all of the percussive research till date is focused on the process automation advances but enough work has not been done to understand the properties of the assembled joint using the percussive technique. The percussive results will be compared with quasi-static squeeze process results. Strain rate effects and thermal effects are negligible in the quasi-static process while these effects are present in the percussive process. So, the results and observations from quasi-static DOE will be used as a benchmark against which the percussive DOE results will be compared. The Johnson-Cook material model has been used for describing the flow stress of the alloys used in the percussive process.
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Reports on the topic "Quasi-static process"

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Wilkowski, G. M., D. Rudland, P. Mincer, B. Metrovich, and D. Rider. ASME-PVP05 Brittle-to-Ductile Fracture Initiation Transition Temperature for Old Linepipe w Surface-Crack. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0011772.

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Much work has been done to assess constraint effects on the crack-driving force for specimens and cracks in pipes. The material's transition temperature where the fracture process changes from ductile tearing to cleavage fracture at crack initiation is affected by the constraint conditions but is a material property that cannot be determined analytically. This paper presents a methodology to account for constraint effects to predict the lowest temperature where ductile fracture initiation occurs and relates that temperature back to Charpy impact data for X60 and lower grades, particularly for older vintage linepipe materials. The method involves a series of transition temperature shifts to account for thickness effects, strain-rate effects, and constraint effects to give a master curve of transition temperatures from Charpy data to through-wall-cracked or surface-cracked pipes (with various a/t values) under quasi-static loading. These transition temperature shifts were based on hundreds of pipe tests and thousands of specimen tests over several decades of work by numerous investigators. This method is being validated by examining 1927 and 1948 vintage linepipe steels. In addition, data have been developed on the 1927 vintage pipe material to assess the effect of the bluntness of a corrosion flaw on the lowest temperature where ductile fracture will still initiate under quasi-static loading. An additional transition temperature shift occurs as a function of the bluntness of the flaw.
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McClelland, Zackery, Haley Peterson, and Kyle Dunsford. Dynamic tensile behavior of laser-directed energy deposition and additive friction stir-deposited AerMet 100. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48177.

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Quasi-static and high-rate tensile experiments were used to examine the strain rate sensitivity of laser-directed energy deposition (L-DED)- and additive friction stir deposition (AFSD)-formed AerMet 100 ultrahigh-strength steel-additive manufactured builds. Electron backscattered diffraction (EBSD) revealed similar as-deposited grain sizes between the two AM processes at approximately 24 μm and 17 μm for the L-DED and AFSD samples, respectively. The strain hardening rate, θ, revealed little change in the overall hardening observed in the L-DED and AFSD materials, with a consistent hardening in the quasi-static samples and three identifiable regions in that of the high-rate tested materials. The LDED deposited materials displayed average ultimate tensile strength values of 1835 and 2902 MPa for the 0.001 s−1 and 2500 s−1 strain rates, respectively and the AFSD deposited materials displayed ultimate tensile strength values of 1928 and 3080 MPa for the 0.001 s−1 and 2500 s−1 strain rates, respectively. Overall, the strength for both processes displayed a positive strain rate sensitivity, with increases in strength of ~1000 MPa for both processes. Fractography revealed significant solidification voids in the laser DED material and poor layer adhesion in the AFSD material.
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Zareian, Farzin, and Joel Lanning. Development of Testing Protocol for Cripple Wall Components (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/olpv6741.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA project is to provide scientifically-based information (e.g., testing, analysis, and resulting loss models) that measure and assess the effectiveness of seismic retrofit to reduce the risk of damage and associated losses (repair costs) of wood-frame houses with cripple wall and sill anchorage deficiencies as well as retrofitted conditions that address those deficiencies. Tasks that support and inform the loss-modeling effort are: (1) collecting and summarizing existing information and results of previous research on the performance of wood-frame houses; (2) identifying construction features to characterize alternative variants of wood-frame houses; (3) characterizing earthquake hazard and ground motions at representative sites in California; (4) developing cyclic loading protocols and conducting laboratory tests of cripple wall panels, wood-frame wall subassemblies, and sill anchorages to measure and document their response (strength and stiffness) under cyclic loading; and (5) the computer modeling, simulations, and the development of loss models as informed by a workshop with claims adjustors. This report is a product of Working Group 3.2 and focuses on Loading Protocol Development for Component Testing. It presents the background, development process, and recommendations for a quasi-static loading protocol to be used for cyclic testing of cripple wall components of wood-frame structures. The recommended loading protocol was developed for component testing to support the development of experimentally informed analytical models for cripple wall components. These analytical models are utilized for the performance-based assessment of wood-frame structures in the context of the PEER–CEA Project. The recommended loading protocol was developed using nonlinear dynamic analysis of representative multi-degree-of-freedom (MDOF) systems subjected to sets of single-component ground motions that varied in location and hazard level. Cumulative damage of the cripple wall components of the MDOF systems was investigated. The result is a testing protocol that captures the loading history that a cripple wall may experience in various seismic regions in California.
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EXPERIMENTAL STUDY ON SEISMIC PERFORMANCE OF PEC COMPOSITE COLUMN-STEEL BEAM FRAME WITH WELDED T-STUB STRENGTHENED CONNECTIONS. The Hong Kong Institute of Steel Construction, 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.5.

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Seismic performance of innovative Partially Encased Composite (PEC) column-steel beam composite frame was investigated, where the connection was strengthened by the welded T-stub. A ½ scale, two-storey, and one bay composite frame specimen was designed and fabricated for the quasi-static test. Through the experimental observation and measurements, the seismic performance were evaluated, including hysteretic characteristic, lateral stiffness, seismic energy dissipation, and ductility. The plastic damage evolution process and ductile failure mode were clarified. The results indicated that the welded T-stud strengthened connection enhanced the integrity of the frame and led to higher seismic strength and larger lateral stiffness. The plastic hinge was observed away from the beam end due to the welded T-stud and the specimen exhibited an approximately completed hysteretic loop. Without significant decreasing of the ultimate bearing capacity, its overall drift, ductility efficient and equivalent viscous damping ratio were 3.63% (push) / 4.07% (pull), 3.21 (push) / 3.70 (pull) and 0.261 respectively. The proposed structure possesses sound deformation, ductility, and energy-dissipation capacity with the desired plastic failure mode induced by the plastic hinges formed in all beam sections near the T-stud end and column section at the bottom, successively. It was demonstrated an ideal ductile energy-dissipation mode of the frame structure.
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