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Relevant bibliographies by topics / Elastic force

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Academic literature on the topic 'Elastic force'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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Journal articles on the topic "Elastic force"

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Raza, Monis, Mridu Sethi, Piush Kumar, Payal Sharma, and Ankit Kumar Shahi. "Time-dependent force depreciation of intraoral orthodontic elastics of variable force and lumen sizes – An in vitro study." Journal of Contemporary Orthodontics 8, no. 1 (2024): 23–28. http://dx.doi.org/10.18231/j.jco.2024.004.

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: To evaluate force decay of elastics of different dimensions and different force values over 48-hours.Steps included extension and immersion of elastics in artificial saliva and measurement of force levels at a specified point of time. A model with vertical pins placed at in the oral cavity. The initial force measurement was done using Universal testing machine before the elastics were engaged onto the pins 37⁰C in artificial saliva. The reading was taken after this in the Universal testing machine for the samples. The elastics were then placed back into the static simulation for the next 23

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Notaroberto, Daniela Ferreira de Carvalho, Mariana Martins e. Martins, Maria Teresa de Andrade Goldner, Alvaro de Moraes Mendes, and Cátia Cardoso Abdo Quintão. "Force decay evaluation of latex and non-latex orthodontic intraoral elastics: in vivo study." Dental Press Journal of Orthodontics 23, no. 6 (2018): 42–47. http://dx.doi.org/10.1590/2177-6709.23.6.042-047.oar.

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ABSTRACT Objective: This clinical study was conducted in order to evaluate force decay over time of latex and non-latex orthodontic intraoral elastics. Methods: Patients (n = 15) were evaluated using latex and non-latex elastics in the periods of : 0, 1, 3, 12 and 24 hours. The rubber bands were transferred to the testing machine (EMIC DL-500 MF), and force values were recorded after stretching the elastic to a length of 25mm. Paired t test was applied and analysis of variance (ANOVA) was used to evaluate the variation of force generated. LSD (Fisher’s least significant difference) post-hoc te

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Camilla Ivini Viana Vieira, Cibele Braga de Oliveira, Alexandre Antonio Ribeiro, et al. "In vitro comparison of the force degradation of orthodontic intraoral elastics from different compositions." RSBO 10, no. 1 (2014): 40–8. http://dx.doi.org/10.21726/rsbo.v10i1.893.

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The synthetic intermaxillary elastic emerged as an alternative for clinical use in patients with latex sensitivity. However, there are disagreements about this elastic protocol use according to the force degradation. Objective: The aim of this study was to evaluate, in vitro, the forces generated by latex and synthetic elastics over time. Material and methods: Sample size of 840 elastics were used (420 latex and 420 synthetic), delivering medium strength (Dental Morelli®) with internal diameter of 1/8”, 3/16”, 1/4” and 5/16”. The elastics were randomly divided into 6 groups according to the ti

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QUENZER, Júlia Polezi, Adriana Simoni LUCATO, Silvia Amélia Scudeler VEDOVELLO, Heloísa Cristina VALDRIGHI, and Mario VEDOVELLO FILHO. "Influence of elastic chain in the degradation of orthodontic forces - in vitro study." Revista de Odontologia da UNESP 44, no. 6 (2015): 320–25. http://dx.doi.org/10.1590/1807-2577.0075.

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AbstractIntroductionElastic chains are indispensable accessories in orthodontic treatment. Changes in their properties are of great interest to professionals in order to gain greater control over tooth movements.ObjectiveEvaluate the influence of trademark and length of the spacer chain on force degradation of elastic.Material and methodWe used the following elastic chain types: TP, Rocky Mountain (RMO) and GAC short, medium and long varieties. The elastics, which contained links corresponding to 12.5 mm, were tensioned between steel pins using Instron 4411 universal testing machine up to 25 m

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Malanon, Sasatorn, Surachai Dechkunakorn, Niwat Anuwongnukroh, and Wassana Wichai. "Comparison of Three Commercial Latex and Non-Latex Orthodontic Elastic Bands." Key Engineering Materials 814 (July 2019): 354–59. http://dx.doi.org/10.4028/www.scientific.net/kem.814.354.

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Orthodontic elastic bands are commonly made from natural rubber because they provide high resiliency at a reasonable cost. However, hypersensitivity related to protein present in latex have been reported in some patients which has led to increased usage of non-latex elastic alternatives. Therefore, the assessment of their mechanical properties is of importance. The objective of this study was to compare the physical and mechanical properties of three commercial latex and non-latex type orthodontic elastic bands. Samples of latex and non-latex type orthodontic elastics from manufacturers – AO (

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Notaroberto, Daniela Ferreira de Carvalho, Mariana Martins e. Martins, Maria Teresa de Andrade Goldner, Cátia Abdo Quintão, and Alvaro de Moraes Mendes. "Analysis in vitro of strength degradation comparing latex and non-latex elastics." Brazilian Journal of Oral Sciences 17 (October 30, 2018): e18144. http://dx.doi.org/10.20396/bjos.v17i0.8653813.

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Aim: This study was conducted in order to evaluate and compare the behavior of latex and non-latex elastics, as the loss of strength over time in vitro. Methods: The study evaluated 15 of each elastic material for the pre-selected times: 0, 1, 3, 12 and 24 hours. The rubber bands were transferred to the testing machine (EMIC DL-500 MF). The force values were recorded after stretching the elastic to a length of 25mm. Independent t-test was applied. Analysis of variance (ANOVA) was used to check the variation of the forces generated between those determined times. To identify between which times

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Suparwitri, Sri, Niswati Fathmah Rosyida, and Ananto Ali Alhasyimi. "Does mouthwash degrade the force of orthodontic latex elastics?" International Journal of Public Health Science (IJPHS) 11, no. 4 (2022): 1350. http://dx.doi.org/10.11591/ijphs.v11i4.21923.

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With the surge of COVID-19 pandemic, orthodontists have recommended the use of mouthwashes. However, this product frequently contains ingredients that can modify the mouth's pH and elastic force. This study examined the influence of mouthwashes on latex elastic force deterioration. One hundred orthodontic latex elastics (1/4”) were separated into five groups: control, zinc sulfate 0.2%, chlorhexidine 0.2%, sodium fluoride 0.2%, and povidone–iodine 1%. The samples were stretched to 19.05 mm, stored in artificial saliva solutions, and incubated. Groups 2–5 tested mouthwashes for 60 seconds every

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Csekő, Kata, Péter Maróti, Zsuzsanna Helyes, et al. "The Effect of Extrinsic Factors on the Mechanical Behavior and Structure of Elastic Dental Ligatures and Chains." Polymers 14, no. 1 (2021): 38. http://dx.doi.org/10.3390/polym14010038.

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Force provided by elastomers used in orthodontics can be affected by several factors present in the oral cavity. The aim of our study was to investigate the role of mouthwashes, toothbrushing, and smoking in the force decay of such elastomers. Tensile strength, changes in the force continuously exerted, and force decay of elastic chains (Ortho Organizer and Masel Short Power Chain) and elastic ligatures (Dentaurum and Masel) by two separate manufacturers were measured. Measurements were initially made on untreated elastics, followed by exposure to different environmental factors including ciga

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Tarannum, Ghazia, Tania Shaw, and Ragni Tandon. "Let’s review the intermaxillary elastics in orthodontics." Asian Journal of Oral Health and Allied Sciences 14 (July 18, 2024): 10. http://dx.doi.org/10.25259/ajohas_3_2024.

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Elastics play an important role in orthodontic treatment by exerting forces on the teeth and jaws to achieve proper alignment and correct malalignment. These are commonly used in combination with braces and/or with other orthodontic appliances to help move the teeth into their desired positions. The use of elastics is believed to arise from many years ago for different purposes in orthodontics. Intraoral elastics can be classified into sagittal, transverse, and vertical planes, and according to force delivery, elastics can be high pull, medium pull, and heavy pull. Like every dental material,

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Malanon, Sasatorn, Surachai Dechkunakorn, Niwat Anuwongnukroh, Pongdhorn Sea-Oui, Puchong Thaptong, and Wassana Wicha. "Mechanical Properties of Experimental Non-Latex Orthodontic Elastic Bands." Applied Mechanics and Materials 897 (April 2020): 185–89. http://dx.doi.org/10.4028/www.scientific.net/amm.897.185.

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. Elastics, a source of continuous orthodontic force, are divided into two types, latex and non-latex, which are made from natural rubber and synthetic rubber, respectively. The major advantage of natural latex elastics is its resiliency to intraoral tractive forces. However, as the incidence of allergic reactions to natural latex has become more widely recognized, non-latex orthodontic elastics have been developed as an alternative. The aim of this study is to investigate the in vitro mechanical properties of Thai non-latex orthodontic elastics as compared to commercially available products.

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Dissertations / Theses on the topic "Elastic force"

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Bischofs, Ilka Bettina. "Elastic interactions of cellular force patterns." Phd thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973638915.

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Chtangeev, Maxim B. "Neutron-deuteron elastic scattering and three-nucleon force." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32311.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (p. 155-156).<br>The differential cross section for neutron-deuteron elastic scattering was measured at six angles over the center-of-mass angular range 65⁰ - 1300⁰ and incident neutron energies 140 - 240 MeV at the LANSCE/WNR facility of the Los Alamos National Laboratory. Witala et al. (H. Witala et al. ), Phys. Rev. Lett. 81, 1183 (1998) have suggested that the differential cross section for nucleon-deuteron scattering at large angles may be sensitive to the presence of a thr

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Campoli, Andrea. "MECHANCIAL PROPERTIES OF ELASTIC THREAD FORCE SYSTEMS IN CANINE EXPOSURES AND APPLICATION OF FORCE." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/591232.

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Oral Biology<br>M.S.<br>Objectives: To investigate differences in the modulus of elasticity, tensile strength, and load at breakage for elastic thread alone and elastic thread with gold chain in combination used in force application of palatally impacted and exposed maxillary canines. Methods: Two groups with n=6 in each were tested. A circular portion of elastic thread was cut, tied and measured to the nearest hundredth of a millimeter and recorded. Five links of a gold chain were cut and an elastic thread was tied to the fifth link opposite the bondable eyelet. The length of the elastic thre

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Ziebarth, Noel Marysa. "Atomic Force Microscopy Measurement of the Elastic Properties of the Lens." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/181.

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The goal of this project was to develop techniques and instrumentation to measure the elastic properties of the lens and lens capsule in situ and their changes with age using Atomic Force Microscopy (AFM). The studies include the construction, characterization, and calibration of laboratory-based Atomic Force Microscope (AFM) to measure mechanical properties of ophthalmic tissues. Atomic Force Microscopy is a nanoscale imaging technique that has been applied to mechanical property measurement through nanoindentation. Young's modulus of elasticity is determined by monitoring the cantilever d

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Vincent, Abhilash. "Probing the Nanoscale Interaction Forces and Elastic Properties of Organic and Inorganic Materials Using Force-Distance (F-D) Spectroscopy." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4251.

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Due to their therapeutic applications such as radical scavenging, MRI contrast imaging, Photoluminescence imaging, drug delivery, etc., nanoparticles (NPs) have a significant importance in bio-nanotechnology. The reason that prevents the utilizing NPs for drug delivery in medical field is mostly due to their biocompatibility issues (incompatibility can lead to toxicity and cell death). Changes in the surface conditions of NPs often lead to NP cytotoxicity. Investigating the role of NP surface properties (surface charges and surface chemistry) on their interactions with biomolecules (Cells, pro

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Heo, Cheol Ho. "Directly Measuring the Adhesive and Elastic Properties of Bacteria using a Surface Force Apparatus." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/196035.

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Bacterial adhesion is the first step of biofilm formation that plays various roles in the environment and the human body. Examples of undesirable roles of biofilm formation include metal rust, sewage sludge and bacteria-related diseases. Desirable roles are biofiltration and bioremediation.For a decade, Atomic Force Microscopy (AFM) has been the primary tool used to study the adhesion and elastic properties of individual bacteria. In this work we show it is possible to use a Surface Forces Apparatus (SFA) to measure elastic and adhesive properties of small collections of surface bound bacte

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Bisha, James Victor. "Correlation of the Elastic Properties of Stretch Film on Unit Load Containment." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/27992.

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The purpose of this research was to correlate the applied material properties of stretch film with its elastic properties measured in a laboratory setting. There are currently no tools available for a packaging engineer to make a scientific decision on how one stretch film performs against another without applying the film. The system for stretch wrap comparison is mostly based on trial and error which can lead to a significant loss of product when testing a new film or shipping a new product for the first time. If the properties of applied stretch film could be predicted using a tensile test

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Lawrence, Michael A. "Effects of elastic resistance on concentric force, concentric power, and eccentric velocity during the bench press." CardinalScholar 1.0, 2010. http://liblink.bsu.edu/uhtbin/catkey/1567419.

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Elastic bands are becoming more popular in strength and power training. Although increases in strength and power have been anecdotally reported with high loads of elastic resistance, there is no research on large band tensions and their effects on force and power variables. The purpose of this study was to quantify peak concentric force, peak concentric power and peak eccentric velocity produced by the subject when using differing levels of elastic resistance (0%, 20%, 50% and 75% of the total load being elastic resistance) in the bench press. Seven experienced male powerlifters and body build

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Laubie, Hadrien Hyacinthe. "Elastic properties and failure behavior of disordered porous solids : a potential-of-mean-force-based lattice element approach." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111443.

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Thesis: Ph. D. in Mechanics of Materials, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 165-175).<br>The effective mechanical properties of multiphase materials not only depend on the volume fraction and chemical composition of their constituents but also on details of their local texture. Yet, most homogenization methods do not take this texture effect into account. Understanding how local texture affects the overall elastic and failure properties of heterog

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Verma, Himanshu Kumar. "Nanomechanical and Nanotribological Characterization of Sub-Micron Polymeric Spheres." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5791.

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Friction between nanoscale objects has been a subject of great interest and intense research effort for the last two decades. However, the vast majority of the work done in this area has focused upon the sliding friction between two rigid, atomically smooth surfaces. Thus the parameter most explored has been the corrugation in the atomic potentials and how this affects the force required to slide one object across another. In truth, many nanoscale objects whose translation force is of practical interest are more spherical in nature. We hypothesize that the factors that determine the translatio

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Books on the topic "Elastic force"

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Paxson, Daniel E. Wave augmented diffusers for centrifugal compressors. National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Lichtenberg, Frank R. How elastic is the government's demand for weapons? National Bureau of Economic Research, 1989.

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Slemp, Wesley C. H. Design, optimization and evaluation of integrally stiffened Al 7050 panel with curved stiffeners. National Aeronautics and Space Administration, Langley Research Center, 2011.

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Yegian, Richard. Derivation of Full Elastic Fields for Force Doublets near an Interface Between Two Materials. Independently Published, 2018.

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Derivation of Full Elastic Fields for Force Doublets near an Interface Between Two Materials. Independently Published, 2018.

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Biewener, Andrew A., and Shelia N. Patek, eds. Muscles and Skeletons. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198743156.003.0002.

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Animal locomotion depends on the organization, physiology and biomechanical properties of muscles and skeletons. Musculoskeletal systems encompass the mechanical interactions of muscles and skeletal elements that ultimately transmit force for movement and support. Muscles not only perform work by contracting and shortening to generate force, they can also operate as brakes to slow the whole body or a single appendage. Muscles can also function as struts (rod-like) to maintain the position of a joint and facilitate elastic energy storage and recovery. Skeletal muscles share a basic organization

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Poppinga, Simon, Ulrike Bauer, Thomas Speck, and Alexander G. Volkov. Motile traps. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0014.

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We review the biomechanics, functional morphology, and physiology of motile traps. The movements of snap traps in Aldrovanda and Dionaea, motile adhesive traps in Drosera and Pinguicula, and suction traps in Utricularia are driven by active water displacement processes leading to reversible turgor changes of motor cells, irreversible growth, or mechanical pre-stressing of tissues. In some cases, the motion is amplified by the release of elastic energy stored in these tissues. The only known case of a passive motile trapping movement is the ‘springboard’ trapping mechanism of Nepenthes gracilis

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Vibrational control of a nonlinear elastic panel. Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1998.

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Vibrational control of a nonlinear elastic panel. Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1998.

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Hedenstierna, Göran, and João Batista Borges. Normal physiology of the respiratory system. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0071.

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The lungs contain 200–300 million alveoli that are reached via 23 generations of airways. The volume in the lungs after an ordinary expiration is called functional residual capacity (FRC) and is approximately 3–4 L. The lung is elastic and force (pressure) is needed to expand it and to overcome the resistance to gas flow in the airways. This pressure can be measured as pleural minus alveolar pressure. The inspired volume goes mainly to dependent, lower lung regions, but with increasing age and in obstructive lung disease airways may close in dependent lung regions during expiration, impeding o

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Book chapters on the topic "Elastic force"

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Ştefănescu, Dan Mihai. "Axisymmetric Elastic Elements." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_31.

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Ştefănescu, Dan Mihai. "Volumetric Elastic Elements." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_32.

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Ştefănescu, Dan Mihai. "Classification of Elastic Elements." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_20.

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Ştefănescu, Dan Mihai. "Shearing Strained Elastic Elements." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_26.

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Ştefănescu, Dan Mihai. "Elastic Elements Selection Criteria." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_34.

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Ştefănescu, Dan Mihai. "Complex, Composed and Combined Elastic Structures." In Handbook of Force Transducers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18296-9_33.

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Flores, Paulo, and Hamid M. Lankarani. "Pure Elastic Contact Force Models." In Solid Mechanics and Its Applications. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30897-5_2.

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Karami, G. "Boundary Element Method for Elastic Thermo-Elastic Body Force Problems Using Pseudo-Body Force Approach." In Computational Mechanics ’88. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-61381-4_18.

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Ştefănescu, Dan Mihai. "Testing Equipment to Investigate Elastic Constants of Rocks and Composites." In Handbook of Force Transducers. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35322-3_8.

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Hönerlage, B. "CuI: force constants, elastic moduli, effective charges." In New Data and Updates for III-V, II-VI and I-VII Compounds. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92140-0_267.

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Conference papers on the topic "Elastic force"

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Kuroki, Yusaku, and Seiichiro Katsura. "Parallel Wire Mechanism for Gravity Compensation with Variable Elastic Force." In IECON 2024 - 50th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2024. https://doi.org/10.1109/iecon55916.2024.10905747.

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Harmatz, Noah, Alina Zahra, Amir Abdelmalak, Shivam Purohit, Trevor Shin, and Aaron D. Mazzeo. "Hybrid Force-Position Control of an Elastic Tendon-Driven Scrubbing Robot (TEDSR)." In 2024 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2024. http://dx.doi.org/10.1109/icra57147.2024.10610594.

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Pfeiffer, F. G. "Path and force control of elastic manipulators." In 29th IEEE Conference on Decision and Control. IEEE, 1990. http://dx.doi.org/10.1109/cdc.1990.203650.

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Yang, Li, and Feng Huashan. "Force Control of Series Elastic Actuator: Implications for Series Elastic Actuator Design." In 2015 Fifth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC). IEEE, 2015. http://dx.doi.org/10.1109/imccc.2015.186.

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Inoue, Takahiro, and Richa Hu. "Fingertip Force Control Based on Contraction Force Model of Elastic Round-Belt." In 2023 23rd International Conference on Control, Automation and Systems (ICCAS). IEEE, 2023. http://dx.doi.org/10.23919/iccas59377.2023.10316882.

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Cheon, Dasol, and Sehoon Oh. "Acceleration Based Force Estimation in Series Elastic Actuator." In IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2018. http://dx.doi.org/10.1109/iecon.2018.8592880.

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Thomas, Gray C., Clayton C. Gimenez, Erica D. Chin, Andrew P. Carmedelle, and Aaron M. Hoover. "Controllable, High Force Amplification Using Elastic Cable Capstans." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71295.

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This paper presents the design and experimental characterization of a continuously variable linear force amplifier based on the theory of capstans. In contrast to traditional capstan amplifiers, the design presented here uses an elastic cable, enabling a control actuator to not only continuously clutch output to a rotating drum but also passively declutch by releasing tension. Our experimental results demonstrate successful declutching at all force amplification ratios up to the limit of our experimental apparatus, 21 — significantly higher than previously published values. A system of distrib

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Suo, Yongyong, Purong Jia, Long Zhang, and Gang Wang. "Elastic Solution of Orthotropic Plate with Shear Force." In 2020 7th International Forum on Electrical Engineering and Automation (IFEEA). IEEE, 2020. http://dx.doi.org/10.1109/ifeea51475.2020.00050.

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Wang, Xinnan, and Xiaodong Li. "Capillary Force Induced Elastic Deformation on ZnS Nanobeams." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50302.

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In this study, synthesized Wurtzite-structured ZnS nanobelts was investigated using high resolution transmission electron microscope, atomic force microscope, and scanning electron microscope for structural and morphology analyses. Results show that ZnS nanobelts are tens of microns in length, mostly ∼40×50 nm2 in width and thickness. The nanobelts grow along direction [001] and are dislocation free. The distance spacing for (001) plane is 3.19A˚. The capillary force was found strong enough to deform the ZnS nanobeam down to the substrate. Theoretical analysis on small strain elastic deformati

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Tokatli, Ozan, and Volkan Patoglu. "Series elastic actuation for force controlled micro-manipulation." In 2011 IEEE International Conference on Mechatronics (ICM). IEEE, 2011. http://dx.doi.org/10.1109/icmech.2011.5971323.

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Reports on the topic "Elastic force"

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Chell. PR-015-063513-R01 Evaluating Failure Susceptibility Due to Axial Cracks in Pressurized Line Pipe. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0010971.

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A best estimate methodology based on elastic-plastic fracture mechanics technology was developed that uses the cract tip driving force parameter to support the remaining fatigue life calculations. Development of this technology is facilitated by finite element analysis.

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Floyd, Webster, and Andrew Ward. Mobile Runway Edge Sheave Anchor criteria in asphalt concrete pavement. Engineer Research and Development Center (U.S.), 2025. https://doi.org/10.21079/11681/49724.

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The Mobile Runway Edge Sheave (MRES) is used in conjunction with the Mobile Aircraft Arresting System (MAAS) for setback aircraft arresting system (AAS) installations in expedient or temporary situations. There are existing criteria and tactics, techniques, and procedures (TTPs) for MRES installations on portland cement concrete (PCC) pavement and soil, but these criteria have not been developed for asphalt concrete (AC) pavements. The US Air Force Civil Engineer Center (AFCEC) tasked the US Army Engineer Research and Development Center (ERDC) to develop anchor criteria for the MRES in AC pave

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Nasr, Jonathan. DEVELOPMENT OF A DESIGN GUIDELINE FOR BRIDGE PILE FOUNDATIONS SUBJECTED TO LIQUEFACTION-INDUCED LATERAL SPREADING. Deep Foundations Institute, 2018. http://dx.doi.org/10.37308/cpf-2016-ssmc-1.

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Effective-stress nonlinear dynamic analyses (NDA) were performed for piles in liquefiable sloped ground to assess how inertia and liquefaction-induced lateral spreading combine in long-duration vs. short-duration earthquakes. A parametric study was performed using input motions from subduction and crustal earthquakes covering a wide range of earthquake durations. The NDA results were used to evaluate the accuracy of the equivalent static analysis (ESA) recommended by Caltrans/ODOT for estimating pile demands. Finally, the NDA results were used to develop new ESA methods to combine inertial and

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Pisani, William, Dane Wedgeworth, Michael Roth, John Newman, and Manoj Shukla. Exploration of two polymer nanocomposite structure-property relationships facilitated by molecular dynamics simulation and multiscale modeling. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/46713.

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Polyamide 6 (PA6) is a semi-crystalline thermoplastic used in many engineering applications due to good strength, stiffness, mechanical damping, wear/abrasion resistance, and excellent performance-to-cost ratio. In this report, two structure-property relationships were explored. First, carbon nanotubes (CNT) and graphene (G) were used as reinforcement molecules in simulated and experimentally prepared PA6 matrices to improve the overall mechanical properties. Molecular dynamics (MD) simulations with INTERFACE and reactive INTERFACE force fields (IFF and IFF-R) were used to predict bulk and You

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Gunay, Selim, Fan Hu, Khalid Mosalam, et al. Blind Prediction of Shaking Table Tests of a New Bridge Bent Design. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/svks9397.

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Considering the importance of the transportation network and bridge structures, the associated seismic design philosophy is shifting from the basic collapse prevention objective to maintaining functionality on the community scale in the aftermath of moderate to strong earthquakes (i.e., resiliency). In addition to performance, the associated construction philosophy is also being modernized, with the utilization of accelerated bridge construction (ABC) techniques to reduce impacts of construction work on traffic, society, economy, and on-site safety during construction. Recent years have seen s

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Moghimi, Gholamreza, and Nicos Makris. Response Modification of Structures with Supplemental Rotational Inertia. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2024. http://dx.doi.org/10.55461/tihv1701.

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Tall, multistory, buildings are becoming increasingly popular in large cities as a result of growing urbanization trends (United Nations Department of Economic and Social Affairs 2018). As cities continue to grow, many of them along the coasts of continents which are prone to natural hazards, the performance of tall, flexible buildings when subjected to natural hazards is a pressing issue with engineering relevance. The performance of structures when subjected to dynamic loads can be enhanced with various response modification strategies which have been traditionally achieved with added stiffn

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Pullammanappallil, Pratap, Haim Kalman, and Jennifer Curtis. Investigation of particulate flow behavior in a continuous, high solids, leach-bed biogasification system. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7600038.bard.

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Recent concerns regarding global warming and energy security have accelerated research and developmental efforts to produce biofuels from agricultural and forestry residues, and energy crops. Anaerobic digestion is a promising process for producing biogas-biofuel from biomass feedstocks. However, there is a need for new reactor designs and operating considerations to process fibrous biomass feedstocks. In this research project, the multiphase flow behavior of biomass particles was investigated. The objective was accomplished through both simulation and experimentation. The simulations included

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Berzeri, Marcello, Marcello Campanelli, and Ahmed A. Shabana. Definition of the Elastic Forces in the Finite Element Formulations. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada358178.

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Wu, Yingjie, Selim Gunay, and Khalid Mosalam. Hybrid Simulations for the Seismic Evaluation of Resilient Highway Bridge Systems. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/ytgv8834.

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Bridges often serve as key links in local and national transportation networks. Bridge closures can result in severe costs, not only in the form of repair or replacement, but also in the form of economic losses related to medium- and long-term interruption of businesses and disruption to surrounding communities. In addition, continuous functionality of bridges is very important after any seismic event for emergency response and recovery purposes. Considering the importance of these structures, the associated structural design philosophy is shifting from collapse prevention to maintaining funct

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Turner, John. Evaluation of Elongation Criteria and Friction Loss in Ground Anchors. Deep Foundations Institute, 2014. http://dx.doi.org/10.37308/cpf-2013-soil-1.

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This report describes a research project for evaluating the applicability of the widely accepted 80 percent criterion for elongation of ground anchors to anchors with unbonded lengths exceeding 100 feet. This issue is driven by several recent projects involving ground anchors for landslide stabilization in which a significant percentage of the anchors did not meet the criterion that requires measured elongation during proof load testing of at least 80 percent of the theoretical elastic elongation. The projects involved anchor unbonded lengths in the range of 85 to 220 feet, which is outside th

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