Relevant bibliographies by topics / Cyclic plasticity

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Cyclic plasticity'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Cyclic plasticity.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Cyclic plasticity"

1

Moosbrugger, J. C., and N. Ohno. "Multiaxial plasticity, cyclic plasticity and viscoplasticity." International Journal of Plasticity 16, no. 3-4 (January 2000): 223–24. http://dx.doi.org/10.1016/s0749-6419(99)00062-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Šumarac, Dragoslav, and Zoran Perović. "Cyclic plasticity of trusses." Archive of Applied Mechanics 85, no. 9-10 (December 3, 2014): 1513–26. http://dx.doi.org/10.1007/s00419-014-0954-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Tóth, L. S., A. Molinari, and N. Zouhal. "Cyclic plasticity phenomena as predicted by polycrystal plasticity." Mechanics of Materials 32, no. 2 (February 2000): 99–113. http://dx.doi.org/10.1016/s0167-6636(99)00040-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chaboche, J. L. "Constitutive equations for cyclic plasticity and cyclic viscoplasticity." International Journal of Plasticity 5, no. 3 (January 1989): 247–302. http://dx.doi.org/10.1016/0749-6419(89)90015-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Lou, J., P. Shrotriya, and W. O. Soboyejo. "A Cyclic Microbend Study on LIGA Ni Microelectromechanical Systems Thin Films." Journal of Engineering Materials and Technology 127, no. 1 (January 1, 2005): 16–22. http://dx.doi.org/10.1115/1.1836767.

Full text
Abstract:
This paper presents the results of recent studies of cyclic microbend experiments and their consequences for plasticity length-scale phenomena in LIGA Ni microelectromechanical systems (MEMS) thin films. The strain–life fatigue behavior of LIGA Ni thin films is studied by performing fully reversed cyclic microbend experiments that provide insights into cyclic stress/strain evolution and cyclic failure phenomena. The effects of cyclic deformation on the plasticity length-scale parameters are also considered within the context of strain gradient plasticity theories. The implications of the results are then discussed for the analysis of plasticity and cyclic deformation in MEMS structures and other microscale systems.
APA, Harvard, Vancouver, ISO, and other styles
6

Brocks, Wolfgang, and Dirk Steglich. "Damage Models for Cyclic Plasticity." Key Engineering Materials 251-252 (October 2003): 389–98. http://dx.doi.org/10.4028/www.scientific.net/kem.251-252.389.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Mikhalevich, V. M. "Plasticity with cyclic hot working." Strength of Materials 26, no. 6 (June 1994): 407–12. http://dx.doi.org/10.1007/bf02209409.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

HASHIGUCHI, Koichi. "Assessment of cyclic plasticity models." Proceedings of The Computational Mechanics Conference 2022.35 (2022): GS—01. http://dx.doi.org/10.1299/jsmecmd.2022.35.gs-01.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Chiang, Dar-Yun. "A Phenomenological Model for Cyclic Plasticity." Journal of Engineering Materials and Technology 119, no. 1 (January 1, 1997): 7–11. http://dx.doi.org/10.1115/1.2805979.

Full text
Abstract:
A phenomenological model is proposed for cyclic plasticity based on the concept of distributed elements, which is capable of reflecting microstructural behavior of real materials under multiaxial cyclic loading conditions. By investigating the detailed behavior of the model, various important phenomena and effects of materials in cyclic plasticity can be elucidated. Generalization of the model is also done to include cyclic hardening effects. A thorough understanding of these complicated response mechanisms and material properties provides useful insight and guidelines for validating analytical models and for performing experimental studies in the related areas of cyclic plasticity.
APA, Harvard, Vancouver, ISO, and other styles
10

Sajjad, Hafiz Muhammad, Stefanie Hanke, Sedat Güler, Hamad ul Hassan, Alfons Fischer, and Alexander Hartmaier. "Modelling Cyclic Behaviour of Martensitic Steel with J2 Plasticity and Crystal Plasticity." Materials 12, no. 11 (May 31, 2019): 1767. http://dx.doi.org/10.3390/ma12111767.

Full text
Abstract:
In order to capture the stress-strain response of metallic materials under cyclic loading, it is necessary to consider the cyclic hardening behaviour in the constitutive model. Among different cyclic hardening approaches available in the literature, the Chaboche model proves to be very efficient and convenient to model the kinematic hardening and ratcheting behaviour of materials observed during cyclic loading. The purpose of this study is to determine the material parameters of the Chaboche kinematic hardening material model by using isotropic J2 plasticity and micromechanical crystal plasticity (CP) models as constitutive rules in finite element modelling. As model material, we chose a martensitic steel with a very fine microstructure. Thus, it is possible to compare the quality of description between the simpler J2 plasticity and more complex micromechanical material models. The quality of the results is rated based on the quantitative comparison between experimental and numerical stress-strain hysteresis curves for a rather wide range of loading amplitudes. It is seen that the ratcheting effect is captured well by both approaches. Furthermore, the results show that concerning macroscopic properties, J2 plasticity and CP are equally suited to describe cyclic plasticity. However, J2 plasticity is computationally less expensive whereas CP finite element analysis provides insight into local stresses and plastic strains on the microstructural length scale. With this study, we show that a consistent material description on the microstructural and the macroscopic scale is possible, which will enable future scale-bridging applications, by combining both constitutive rules within one single finite element model.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Cyclic plasticity"

1

Adkin, P. "Yield surfaces in cyclic plasticity." Thesis, Coventry University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374221.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bari, MD Shafiqul. "Constitutive Modeling for Cyclic Plasticity and Ratcheting." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010118-225417.

Full text
Abstract:

ABSTRACT BARI, MD. SHAFIQUL Constitutive Modeling for Cyclic Plasticity and Ratcheting. (under the supervision of Dr. Tasnim Hassan)This study critically evaluates the performance of a number of constitutive models in predicting ratcheting responses of carbon steel for a set of uniaxial and biaxial loading histories. Two types of modeling schemes, coupled and uncoupled, are evaluated. The coupled models from Prager, Armstrong-Frederick, Chaboche, Ohno-Wang, and Guionnet are examined. The Prager and the Armstrong-Frederick models perform inadequately. The Chaboche and Ohno-Wang models perform well for uniaxial ratcheting responses, but overpredict the biaxial ratcheting. The Guionnet model simulates one set of biaxial ratcheting response well, but fails in others. Performances of several kinematic hardening rules, when used with the uncoupled Dafalias-Popov model are also evaluated. The Armstrong-Frederick rule simulates one set of biaxial response reasonably. The Voyiadjis-Sivakumar, Phillips, Tseng-Lee, Kaneko and Xia-Ellyin rules fail to simulate the biaxial ratcheting responses. The Chaboche rule, with three decomposed terms, performs reasonably for the whole set of responses. The Ohno-Wang rule also performs reasonably, except for one biaxial response. This study indicates a strong influence of the kinematic hardening rule and its parameter determination scheme on multiaxial ratcheting simulations. The coupled models by McDowell, Jiang-Sehitoglu, Voyiadjis-Basuroychowdhury and AbdelKarim-Ohno, where additional multiaxial parameters are included in the hardening rules, are also investigated. None of these models perform consistently for the whole set of experiments. A modified kinematic hardening rule using the idea of Delobelle and his co-workers in the framework of the Chaboche model is proposed. This new rule performs impressively for all of the ratcheting responses considered. Several models for anisotropic deformation of the yield surface are scrutinized. Most of these models use complex and numerically extensive higher order tensors for the yield surface formulations and thus become less attractive for implementation with a cyclic plasticity model. This study demonstrates the methodology and promise in incorporating the equi-plastic-strain surface proposed by Shiratori and his co-workers into the Dafalias-Popov model for general multiaxial ratcheting simulations.

APA, Harvard, Vancouver, ISO, and other styles
3

Oloyede, Vincent Olayinka Adekunle. "Computational studies of materials under cyclic plasticity." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38123.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Saad, Abdullah Aziz. "Cyclic plasticity and creep of power plant materials." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12538/.

Full text
Abstract:
The thermo-mechanical fatigue (TMF) of power plant components is caused by the cyclic operation of power plant due to startup and shutdown processes and due to the fluctuation of demand in daily operation. Thus, a time-dependent plasticity model is required in order to simulate the component response under cyclic thermo-mechanical loading. The overall aim behind this study is to develop a material constitutive model, which can predict the creep and cyclic loading behaviour at high temperature environment, based on the cyclic loading test data of the P91 and the P92 steels. The tests on all specimens in the study were performed using the Instron 8862 TMF machine system with a temperature uniformity of less than ±10°C within the gauge section of the specimen. For the isothermal tests on the P91 steel, fully-reversed, strain-controlled tests were conducted on a parent material of the steel at 400, 500 and 600˚C. For the P92 steel, the same loading parameters in the isothermal tests were performed on a parent material and a weld metal of the steels at 500, 600 and 675°C. Strain-controlled thermo-mechanical fatigue tests were conducted on the parent materials of the P91 and the P92 steels under temperature ranges of 400-600°C and 500-675°C, respectively, with in-phase (IP) and out-of-phase (OP) loading. In general, the steels exhibit cyclic softening behaviour throughout the cyclic test duration under both isothermal and anisothermal conditions. The cyclic softening behaviour of the P91 steel was further studied by analyzing stress-strain data at 600°C and by performing microstructural investigations. Scanning electron microscope (SEM) and transmission electron microscope (TEM) images were used to investigate microstructural evolution and the crack initiation of the steel at different life fractions of the tests. The TEM images of the interrupted test specimens revealed subgrain coarsening during the cyclic tests. On the other hand, the SEM images showed the initiation of microcracks at the end of the stabilisation period and the cracks were propagated in the third stage of cyclic softening. A unified, Chaboche, viscoplasticity model, which includes combined isotropic softening and kinematic hardening with a viscoplastic flow rule for time-dependent effects, was used to model the TMF behaviour of the steels The constants in the viscoplasticity model were initially determined from the first cycle stress-strain data, the maximum stress evolution during tests and the stress relaxation data. Then, the initial constants were optimized using a least-squares optimization algorithm in order to improve the general fit of the model to experimental data. The prediction of the model was further improved by including the linear nonlinear isotropic hardening in order to obtain better stress-strain behaviour in the stabilisation period. The developed viscoplasticity model was subsequently used in the finite element simulations using the ABAQUS software. The focus of the simulation is to validate the performance of the model under various types of loading. Simulation results have been compared with the isothermal test data with different strain ranges and also the anisothermal cyclic testing data, for both in-phase and out-of-phase loadings. The model’s performance under 3-dimensional stress conditions was investigated by testing and simulating the P91 steel using a notched specimen under stress-controlled conditions. The simulation results show a good comparison to the experimental data.
APA, Harvard, Vancouver, ISO, and other styles
5

Yip, Tick-Hon. "Cyclic plasticity of 17-7 precipitation-hardenable semi-austenitic stainless steel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/NQ35375.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lavender, David A. "Deformation and rupture of structures due to combined cyclic plasticity and creep." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/34793.

Full text
Abstract:
The effect of creep-fatigue conditions on structural components is not completely understood, and so the prediction of the behaviour and lifetime of such components is often unreliable and inaccurate. One of the methods proposed to improve the predictions is continuum damage mechanics, which provides a general description of material behaviour under degrading conditions. An estimate of life is usually based on the initial behaviour of a component. However, the work of previous researchers has shown that accurate predictions of the creep life of structures require that the stress redistribution due to the growth of damage is taken into account. In this thesis, this work is extended to fatigue and the effect of fatigue damage on life and deformation is studied for multibar model structures. The non-linear kinematic hardening rule is introduced as a constitutive law for cyclic plasticity that models many aspects of the cyclic behaviour of metals. Its properties are studied and it is extended to include the effects of damage on cyclic deformation. Creep-fatigue is studied by combining the models for fatigue and creep. Using published material data, the creep-fatigue behaviour of a two bar structure is studied and the results are compared with some experimental results. A study is made of finite element methods for solving problems involving plasticity and an example problem is solved. A model for the multiaxial behaviour of damaged material is proposed and examined for simple cases. The studies show that stress redistribution has a significant effect on fatigue life and the qualitative properties of the uniaxial models are very close to experimental observations. However, a lack of suitable and consistent experimental data on material behaviour means that the lifetime predictions and the multiaxial models are of uncertain accuracy.
APA, Harvard, Vancouver, ISO, and other styles
7

Seidalinov, Gaziz. "A simple anisotropic bounding surface plasticity model for cyclic response of clays." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43501.

Full text
Abstract:
Natural clays are anisotropic in their in-situ state and have an undisturbed shear strength in excess of the remoulded strength. In addition, most of the structures founded on clay deposits must be designed to withstand cyclic loads such as seismic ground motions or ocean waves. When subjected to earthquake or wind induced cyclic loadings, clay exhibits complex response. A realistic modeling of clay response under irregular cyclic loading requires an appropriate description of the stress{strain relationship. This thesis extends the formulation of a Simple ANIsotropic CLAY plasticity (SANICLAY) model by incorporation of a bounding surface formulation for successful simulations of clay response under cyclic loading. The most important aspects of the proposed formulation are the position of a projection center and the ability to capture continuous sti ness degradation. The proposed projection center is established in the instant of any stress reversal and it realistically re ects the experimentally observed plastic strains. A damage parameter is also adopted to better simulate the continuous sti ness reduction during the course of applied cyclic loading. The proposed model is developed with the aim of maintaining the simplicity and yet including an adequate level of sophistication for successful modeling of the key features of clay response. The model formulation is presented in detail followed by its qualitative and quantitative comparison with experimentally observed clay response. The presented model validation demonstrates the capabilities of the model in capturing a number of important characteristic features of clay response in both monotonic and cyclic loadings. Limitations and recommendations for future work are discussed as well. ii
APA, Harvard, Vancouver, ISO, and other styles
8

Lu, Jiawa. "Material characterisation and finite element modelling of the cyclic plasticity behaviour of steels." Thesis, University of Nottingham, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.716486.

Full text
Abstract:
The aim of the study was to experimentally investigate the cyclic plasticity behaviour of steels, and to simulate low cycle fatigue failure by using two material models on either mesoscale or microscale. UMAT subroutines were developed to allow the cyclic plasticity behaviour to be predicted in the ABAQUS FE software. The fatigue behaviour of a P91 power plant steel at a temperature of 600 °C was studied by performing uniaxial fatigue tests and microstructural analysis using electron microscopy. A continuum damage mechanics approach was coupled to the constitutive equations of the Chaboche elasto-visco-plastic model to describe the low cycle fatigue failure at high temperature. A stress partition method was developed to interpret the cyclic softening behaviour, and used to give an initial estimate of the material constants in the Chaboche model. Low cycle fatigue tests were also carried out for a 304 stainless steel at room temperature. The crystal plasticity finite element method was used to predict the hysteresis loops under cyclic loadings for a single crystal or polycrystals. A series of experimental characterisations, including SEM, TEM, and XRD, were conducted to facilitate the understanding of the mechanisms responsible for the mechanical responses, and to determine part of the material constants required in the multi-scale constitutive equations for FE simulation. This method can be used to predict the crack initiation sites based on the local accumulated plastic deformation and local plastic dissipation energy criterion, but it has limitation in predicting the crack initiation caused by precipitates.
APA, Harvard, Vancouver, ISO, and other styles
9

Johansson, Nils. "Estimation of fatigue life by using a cyclic plasticity model and multiaxial notch correction." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158095.

Full text
Abstract:
Mechanical components often possess notches. These notches give rise to stress concentrations, which in turn increases the likelihood that the material will undergo yielding. The finite element method (FEM) can be used to calculate transient stress and strain to be used in fatigue analyses. However, since yielding occurs, an elastic-plastic finite element analysis (FEA) must be performed. If the loading sequence to be analysed with respect to fatigue is long, the elastic-plastic FEA is often not a viable option because of its high computational requirements. In this thesis, a method that estimates the elastic-plastic stress and strain response as a result of input elastic stress and strain using plasticity modelling with the incremental Neuber rule has been derived and implemented. A numerical methodology to increase the accuracy when using the Neuber rule with cyclic loading has been proposed and validated for proportional loading. The results show fair albeit not ideal accuracy when compared to elastic-plastic finite element analysis. Different types of loading have been tested, including proportional and non-proportional as well as complex loadings with several load reversions. Based on the computed elastic-plastic stresses and strains, fatigue life is predicted by the critical plane method. Such a method has been reviewed, implemented and tested in this thesis. A comparison has been made between using a new damage parameter by Ince and an established damage parameter by Fatemi and Socie (FS). The implemented algorithm and damage parameters were evaluated by comparing the results of the program using either damage parameter to fatigue experiments of several different load cases, including non-proportional loading. The results are fairly accurate for both damage parameters, but the one by Ince tend to be slightly more accurate, if no fitted constant to use in the FS damage parameter can be obtained.
APA, Harvard, Vancouver, ISO, and other styles
10

Barros, Cainã Bemfica de. "Fatigue and cyclic plasticity of 304L stainless steel under axial, torsional and proportional axial-torsional loading." reponame:Repositório Institucional da UnB, 2018. http://repositorio.unb.br/handle/10482/31953.

Full text
Abstract:
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, 2018.
Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2018-05-07T18:41:32Z No. of bitstreams: 1 2018_CainãBemficadeBarros.pdf: 12251436 bytes, checksum: 876fa05cf00aed82da7e296be39eec5e (MD5)
Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2018-05-23T11:34:13Z (GMT) No. of bitstreams: 1 2018_CainãBemficadeBarros.pdf: 12251436 bytes, checksum: 876fa05cf00aed82da7e296be39eec5e (MD5)
Made available in DSpace on 2018-05-23T11:34:13Z (GMT). No. of bitstreams: 1 2018_CainãBemficadeBarros.pdf: 12251436 bytes, checksum: 876fa05cf00aed82da7e296be39eec5e (MD5) Previous issue date: 2018-05-23
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).
Os objetivos deste trabalho são investigar o comportamento tensão-deformação cíclico e a fadiga multiaxial do aço inoxidável 304L por meio de ensaios axiais, torsionais e axiais-torsionais proporcionais totalmente alternados controlados por deformação à temperatura ambiente e avaliar os modelos de fadiga do tipo plano crítico propostos por Smith, Watson e Topper (1970), e Fatemi e Socie (1988) em relação à previsão de vida à fadiga e à orientação das trincas macroscópicas. Corpos de prova tubulares com paredes finas usinados após o tratamento térmico de normalização foram submetidos a amplitudes de deformação equivalente de von Mises tais que 0,20% ≤ Δ/2 ≤ 1,00%. Devido à dependência da taxa de carregamento do comportamento tensão deformação do aço inoxidável 304L, todos os ensaios foram realizados com frequências (0,30-2,00 Hz) tais que a taxa de deformação equivalente de von Mises fosse igual a 10-2 s-1. Observou-se que o endurecimento secundário nos ensaios proporcionais só ocorreu para amplitudes de deformação equivalente Δ/2 ≥ 0,80% enquanto todos os ensaios axiais-torsionais apresentaram endurecimento secundário. Baseado na comparação entre os estados de tensão, concluiu-se que há falha por fadiga antes que o endurecimento secundário se torne significativo para os ensaios proporcionais cuja Δ/2 ≤ 0,60%. Observou-se um comportamento do tipo Masing para uma faixa de deformação axial Δ/2 ≤ 0,40% e torsional Δ/2 ≤ 0,61% para ensaios axiais, torsionais e proporcionais. A deformação equivalente de von Mises não pode ser usada como parâmetro limite para o comportamento Masing já que o ensaio proporcional cuja Δ/2 = 0,50% apresenta comportamento semelhante àquele de ensaios cuja Δ/2 ≤0,50%, o que não ocorre para o ensaio axial de mesma amplitude de deformação equivalente. Observou-se não proporcionalidade nos espaços das tensões desviadoras e das deformações plásticas para os ensaios proporcionais no espaço das deformações totais. No entanto, não se observou um aumento na amplitude de tensão destes ensaios quando comparados a ensaios axiais e torsionais, o que sugere que o endurecimento não proporcional está associado à não proporcionalidade no espaço das deformações totais. Não houve influência significativa do endurecimento secundário na análise de fadiga, já que não houve diferença significativa entre as estimativas de vida realizadas com constantes materiais obtidas de diferentes ciclos de referência para os dois modelos. Os modelos investigados previram a vida à fadiga com boa acurária, mas falharam em prever a orientação das trincas para todas as três histórias de deformação.
The goals of this work are to investigate the cyclic stress-strain behaviour and the multiaxial fatigue of the 304L stainless steel through fully reversed strain-controlled axial, torsional and proportional axial-torsional experiments at room temperature and to evaluate the critical plane fatigue models proposed by Smith, Watson and Topper (1970), and Fatemi and Socie (1988) regarding the fatigue life and the macroscopic fatigue crack orientation. Thin-walled tubular specimens machined after a normalization heat treatment were submitted equivalent von Mises strain amplitudes such that 0:20% "eq=2 1:00%. Due to the rate-dependent cyclic stressstrain behaviour of the 304L stainless steel, all experiments were performed with frequencies (0.30{2.00 Hz) such that the equivalent von Mises strain rate was equal to 102 s1. It was observed that the secondary hardening upon proportional loads occurred only for "eq=2 0:80%, whilst it occurred for all axial and torsional experiments. Based upon the comparison between stress states, it was concluded that fatigue failure occurs before the secondary hardening becomes important for proportional experiments whose "eq=2 0:60%. A Masing-type behaviour was observed for a range of axial strain "=2 0:40% and torsional strain sur=2 0:61% for axial, torsional and proportional experiments. The equivalent von Mises strain amplitude cannot be used as a threshold since the proportional experiment whose "eq=2 = 0:50% exhibits a behaviour similar to experiments whose "eq=2 < 0:50%, which does not occur for the axial experiment with the same equivalent strain amplitude. non-proportionality upon deviatoric stress and plastic strain spaces was observed for proportional experiments upon total strain space. Nonetheless, an increase in stress amplitude was not observed for those experiments when compared to axial and torsional ones, which suggests that non-proportional hardening is related to non-proportionality upon the total strain space. There was no signi cant inuence of secondary hardening upon fatigue analysis since there was no signi cant di erence between life predictions generated from material constants obtained from di erent reference cycles for both models. The investigated models predicted accurately fatigue life, but failed to predict crack orientation for all the three strain histories.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Cyclic plasticity"

1

Kang, Guozheng, and Qianhua Kan. Cyclic Plasticity of Engineering Materials. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119180838.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Cyclic plasticity and low cycle fatigue life of metals. Amsterdam: Elsevier, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Matěj, Bílý, ed. Cyclic deformation and fatigue of metals. Amsterdam: Elsevier, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Shuying. Monotonic, Cyclic and Postcyclic Shear Behavior of Low-plasticity Silt. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7083-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Yip, Tick-Hon. Cyclic plasticity of 17-7 precipitation-hardenable semi-austenitic stainless steel. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Mei-Hwa, Liao, Morris Ronald W, and United States. National Aeronautics and Space Administration., eds. A transient plasticity study and low cycle fatigue analysis of the Space Station Freedom Photovoltaic solar array blanket. [Washington, DC]: National Aeronautics and Space Administration, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Cyclic Plasticity of Metals. Elsevier, 2022. http://dx.doi.org/10.1016/c2018-0-04874-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Polák, J. Cyclic plasticity and low cycle fatigue life of metals. Elsevier, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Jahed, Hamid, and Ali Roostaei. Cyclic Plasticity of Metals: Modeling Fundamentals and Applications. Elsevier, 2022.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Kang, Guozheng, and Qianhua Kan. Cyclic Plasticity of Engineering Materials: Experiments and Models. Wiley & Sons, Incorporated, John, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Cyclic plasticity"

1

Doghri, Issam. "Cyclic plasticity." In Mechanics of Deformable Solids, 423–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04168-0_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Akel, Samir, Gaz de France, and Quoc Son Nguyen. "Limit Response in Cyclic Plasticity." In Anisotropy and Localization of Plastic Deformation, 431–34. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3644-0_100.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Shorr, Boris F. "Thermal Plasticity: Cyclic Loading and Heating." In Foundations of Engineering Mechanics, 91–124. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46968-2_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Zhang, Rui, and Sun Yi. "Cyclic Plasticity and Fatigue Crack Growth." In Fracture and Damage Mechanics V, 603–6. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-413-8.603.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Favier, Denis, Pierre Guélin, Bernard Wack, Pierre Pegon, and Wojciech K. Nowacki. "Constitutive scheme of anisotropic cyclic plasticity." In Large Plastic Deformations, 295–300. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203749173-34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ishikawa, H., and K. Sasaki. "Constitutive Modeling of Nonproportional Cyclic Plasticity." In Computational Mechanics ’88, 451–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-61381-4_109.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Mughrabi, Hael. "Microstructural Aspects of Cyclic Deformation and Fatigue of Metals." In Thermodynamics, Microstructures and Plasticity, 205–16. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0219-6_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hashiguchi, Koichi. "Cyclic Plasticity Models: Critical Reviews and Assessments." In Foundations of Elastoplasticity: Subloading Surface Model, 235–56. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48821-9_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Babuška, I., and Y. Li. "Numerical Solution of Problems of Cyclic Plasticity." In IUTAM Symposium on Discretization Methods in Structural Mechanics, 307–14. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4589-3_36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Hashiguchi, Koichi. "Cyclic Plasticity Model: Extended Subloading Surface Model." In Elastoplasticity Theory, 191–209. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00273-1_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Cyclic plasticity"

1

Leen, S. B., M. Li, R. A. Barrett, S. Scully, D. Joyce, and P. E. O’Donoghue. "High Temperature, Multi-Material, Cyclic Plasticity of a P91 Welded Branch-Header Connection Under Cyclic Pressure." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45605.

Full text
Abstract:
This paper presents a study on high temperature cyclic plasticity of a welded P91 T-joint under cyclic internal pressure, in the context of high temperature low cycle fatigue (HTLCF) performance of such connections. In the present work, attention is focused on the development of a multi-material model for high temperature cyclic plasticity, including the effects of the different weld-related material zones, namely, parent metal, weld metal and heat-affected zone. The cyclic plasticity behaviour of the three zones is identified from previously-published high temperature, low cycle fatigue test results on uniaxial test specimens, including parent metal, weld metal and cross-weld specimens, obtained from a specially fabricated pipe girth weld, using ex-service P91 material. The cyclic plasticity material model includes the effects of kinematic hardening and cyclic softening. A three-dimensional finite element model of the welded T-joint is developed, incorporating the three sets of identified cyclic plasticity constants. The study is limited to isothermal conditions of 500°C, with a view to understanding the complex effects of multiple material zones with inhomogeneous cyclic plasticity behaviour. The heat affected zone is shown to play a key role in the development of plastic strains and localised stresses. The particular T-joint geometry is the subject of an investigation due to premature failure in a combined cycle gas turbine plant.
APA, Harvard, Vancouver, ISO, and other styles
2

Szwedowicz, Jaroslaw, Piotr Bednarz, Christoph Meilgen, and Jeff Samuelson. "Crack Growth Under Cyclic Loading and Plasticity Conditions." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25450.

Full text
Abstract:
The increasing use of renewable energy sources to produce electricity requires additional operational flexibility from fossil-fuel gas and steam turbines. To compensate for renewable energy fluctuations in the electrical grid, a gas turbine (GT) engine needs to be more flexible, operating in peaking and partial loading modes as well as the base-load operation mode. Understanding how these different modes affect the lifetime of turbine components is critical to ensuring favourable RAM (Reliability, Availability, and Maintainability). Component lifetimes in peaking modes are limited by the number of thermo-mechanical cycles that a component can experience before crack initiation. The useful lifetime of some components can be increased by basing the predicted lifetime on the number of cycles for crack initiation plus the number of cycles for the crack to reach its maximum allowable length based on the fracture toughness K1C criterion for linear elastic fracture mechanics (LEFM). This is usually accomplished by using the Paris law to predict the rate of crack growth. Once cracks are formed, further propagation depends on the states of stress and strain near the cracks. These factors, which drive crack growth, can be quantified by the energy release rate. The Paris law predicts crack growth as a function of the energy release rate under linear elastic conditions, commonly for load controlled tests with load ration R>0. However, large thermal and mechanical loading can result in plastic deformation under cyclic loading conditions. Most GT components operate under strain controlled conditions generated by thermal loading. In this paper, a novel method is used to characterize crack growth under cyclic strain conditions in regions under plastic strain. The experimental data reveal that the rate of crack growth changes under plastic conditions in comparison with the linear elastic case. Especially compared to very high stress intensities ΔK of load controlled tests, here the allowable displacement limiting strain control matters. Applying experimental data from material tested under cyclic loading and elastic-plastic material response, component lifetime has been reliably predicted. Hereafter the developed method is referred to as elastic plastic fracture mechanics (EPFM) lifetime assessment. The EPFM approach more closely predicts the observed rate of crack growth than linear elastic fracture mechanics. LEFM over-predicts component lifetime for cracks growing in plastic regions under cyclic loading and could lead to catastrophic failure of a component. Therefore, the lifetime of a highly loaded component is more reliably assessed using the EPFM approach, as demonstrated for two alloys in this paper.
APA, Harvard, Vancouver, ISO, and other styles
3

De Jesus, Abi´lio M. P., He´lder F. S. G. Pereira, Alfredo S. Ribeiro, and Anto´nio A. Fernandes. "A Discussion on the Performance of Continuum Plasticity Models for Fatigue Lifetime Assessment Based on the Local Strain Appraoch." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93460.

Full text
Abstract:
This paper presents a discussion on the performance of continuum plasticity models for fatigue lifetime assessment according to the local strain approach. Several cyclic plasticity phenomena such as the cyclic hardening/softening, ratchetting, cyclic mean stress relaxation and non-proportional cyclic hardening require, in general, specialized continuum plasticity models. Continuum plasticity models, available in commercial finite element codes (e.g. ANSYS®), with linear, multilinear and nonlinear kinematic hardening are identified using the experimental information available for a pressure vessel steel — the P355NL 1 steel. The potentialities of these plasticity models to describe the material cyclic behaviour are discussed, limiting the discussion to proportional loading. The plasticity models are applied to evaluate the strain ranges and mean stresses of a nozzle-to-plate connection. Two analysis strategies are applied to extract the strain ranges, namely the Twice Yield (TY) and the Cycle-by-Cycle (CBC) methods. The mean stress is only evaluated using the CBC method since the TY method has been proposed only for evaluation of the strain ranges. It is demonstrated that the TY and CBC methods gives similar results for the linear and multilinear kinematic hardening plasticity models. The plasticity model can have an important effect on the evaluation of the mean stresses and thus on predicted strain-life results, if mean stress effects are taken into account in the local strain approach. Finally, the calculated strain ranges and mean stresses are used in the evaluation of the fatigue life of the nozzle-to-plate connection using a local strain approach, and predictions are compared with available experimental results. The effect of the mean stress is important for long lives and is very dependent on the continuum plasticity model and on the number of cycles modelled in the CBC extraction method. Although differences are observed in the estimation of the strain ranges, using the several plasticity models, relatively small differences in fatigue life estimations were resulted.
APA, Harvard, Vancouver, ISO, and other styles
4

Ghosh, Somnath. "Modeling Cyclic Deformation of HSLA Steels Using Crystal Plasticity." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766779.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tsutsumi, Seiichiro, Masahiro Toyosada, Daiki Yajima, Koji Gotoh, and Koichi Hashiguchi. "Mechanical Fatigue Simulation by Unconventional Plasticity Model." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92017.

Full text
Abstract:
The deformation behavior of a structure under cyclic loading condition is simulated by using FEM analysis in which a cyclic plasticity model, so-called extended subloading surface model, is incorporated. The adopted cyclic plasticity model is categorized in the framework of the unconventional plasticity model premising that the interior of the yield surface is not a purely elastic domain. The developed FEM program does not include algorithms for both the yielding-judgment and the control of stress so as to lie on the yield surface, since the subloading surface model has the stress controlling function so that a stress approaches the yield surface automatically. In this study, several examples of FEM analysis on the cyclic deformation behaviors are presented to show the potential of the developed FEM program and an incorporated cyclic plasticity model.
APA, Harvard, Vancouver, ISO, and other styles
6

De Jesus, A. M. P., A. S. Ribeiro, and A. A. Fernandes. "Finite Element Modelling of Fatigue Damage Using a Continuum Damage Mechanics Approach." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2667.

Full text
Abstract:
In this paper, a fatigue model formulated in the framework of the Continuum Damage Mechanics (CDM) is presented. The model is based on an explicit definition of fatigue damage and introduces a kinematic damage differential equation formulated, directly, as a function of the number of cycles and the stress cycle parameters. The model is initially presented for uniaxial problems, which facilitates the identification of its constants. An extension of the fatigue model to multiaxial problems is also proposed. This model was implemented in a non-linear finite element code in conjunction with a constitutive model for cyclic plasticity. The cyclic plasticity model considered is based on a J2-plasticity theory with non-linear isotropic and kinematic hardenings. In order to enhance the description of the cyclic elastoplastic behaviour, is suggested the superposition of several non-linear kinematic hardening variables. Both fatigue and plasticity models are identified for the P355NL1 (TStE355) steel. Finally, the numerical model is used to predict the fatigue crack initiation for a welded nozzle-to-plate connection, made of P355NL1 steel, and results are compared with experimental fatigue data.
APA, Harvard, Vancouver, ISO, and other styles
7

Bouchenot, Thomas, Bassem Felemban, Cristian Mejia, and Ali P. Gordon. "Application of Ramberg-Osgood Plasticity to Determine Cyclic Hardening Parameters." In ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59317.

Full text
Abstract:
Critical components of modern turbomachinery are frequently subjected to a myriad of service conditions that include diverse mechanical loads at elevated temperatures. The cost, applicability, and accuracy of either numerical or analytical component-level simulations are largely dependent on the material model chosen for the application. A non-interaction (NI) model derived from individual elastic, plastic, and creep components is developed in this study. The candidate material under examination for this application is 2.25Cr-1Mo, a low-alloy ferritic steel commonly used in chemical processing, nuclear reactors, pressure vessels, and power generation. Data acquired from literature over a range of temperatures up to 650°C are used to calibrate the creep and plastic components described using constitutive models generally native to general-purpose FEA. Traditional methods invoked to generate coefficients for advanced constitutive models such as non-linear kinematic hardening employ numerical fittings of hysteresis data, which result in values that are neither repeatable nor display reasonable temperature-dependence. By extrapolating simplifications commonly used for reduced-order model approximations, an extension utilizing only the cyclic Ramberg-Osgood coefficients has been developed to identify these parameters. Unit cell simulations are conducted to verify the accuracy of the approach. Results are compared with isothermal and non-isothermal literature data.
APA, Harvard, Vancouver, ISO, and other styles
8

Luo, Juan, Guo-zheng Kang, Lei Sun, and Jia-cheng Luo. "A crystal plasticity based cyclic constitutive model for aluminum alloy." In 2017 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA). IEEE, 2017. http://dx.doi.org/10.1109/spawda.2017.8340353.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bao, Yu, Yu-Ning Ge, and Stein Sture. "Unconstrained Optimization and Calibration of a Kinematic-Cyclic Plasticity Model." In Geo-Frontiers Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40771(169)3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Asai, Mitsuteru. "Multiple Time Scale Modeling for Cyclic Deformation with Crystal Plasticity." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766780.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Cyclic plasticity"

1

Castelluccio, Gustavo M. Progress in Modeling Hydrogen Effects with Cyclic Plasticity. Office of Scientific and Technical Information (OSTI), June 2016. http://dx.doi.org/10.2172/1259562.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Paul, J., and L. Molent. Applications of Energy Density Theory in Cyclic Plasticity. Fort Belvoir, VA: Defense Technical Information Center, August 1987. http://dx.doi.org/10.21236/ada186947.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Stuedlein, Armin, Ali Dadashiserej, and Amalesh Jana. Models for the Cyclic Resistance of Silts and Evaluation of Cyclic Failure during Subduction Zone Earthquakes. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, April 2023. http://dx.doi.org/10.55461/zkvv5271.

Full text
Abstract:
This report describes several advances in the cyclic failure assessment of silt soils with immediate and practical benefit to the geotechnical earthquake engineering profession. First, a database of cyclic loading test data is assembled, evaluated, and used to assess trends in the curvature of the CRR-N (cyclic resistance ratio - the number of equivalent cycles) relationship. This effort culminated in a plasticity index-dependent function which can be used to estimate the exponent b in the power law describing cyclic resistance, and may be used to estimate the cyclic resistance of silt soils as well as the number of equivalent loading cycles anticipated for subduction zone earthquakes. Statistical models for the cyclic resistance ratio and cyclic strength ratio are presented in this report. The SHANSEP (Stress History and Normalized Soil Engineering Properties)-inspired functional form of these models have been trained and tested against independent datasets and finalized using a combined dataset to provide reasonable estimates of resistance based on the available data. These models can be used to provide provisional estimates of the CRR-N and cyclic strength ratio power laws for cyclic shear strain failure criteria ranging from 1 to 10%, within certain stated limitations. The ground motion records within the NGA Subduction Project which have been released to the public to-date are implemented to examine the role of subduction zone earthquake characteristics on the number of equivalent loading cycles for a wide range of soils with exponents b ranging from 0.05 (moderate plasticity silt and clay) to 0.35 (dense sand). This analysis shows that the number of loading cycles for a given magnitude subduction zone earthquake is larger than those previously computed, whereas the corresponding magnitude scaling factors for use with the Simplified Method span a smaller range as a result of the ground motion characteristics. Owing to the large variability in the computed equivalent number of loading cycles, consideration of the uncertainty is emphasized in forward analyses. The work described herein may be used to estimate cyclic resistance of intact non-plastic and plastic silt soils and corresponding factor of safety against cyclic failure for a range in cyclic shear strain failure criteria, to plan cyclic laboratory testing programs, and to calibrate models for use in site response and nonlinear deformation analyses in the absence of site-specific cyclic test data. As with any empirical approach, the models presented herein should be revised when additional, high-quality cyclic testing data become available.
APA, Harvard, Vancouver, ISO, and other styles
4

Babuska, I., K. Jerina, Y. Li, and P. Smith. Quantitative Assessment of the Accuracy of Constitutive Laws for Plasticity with an Emphasis on Cyclic Deformation. Fort Belvoir, VA: Defense Technical Information Center, April 1993. http://dx.doi.org/10.21236/ada267562.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Mohanty, Subhasish, William K. Soppet, Saurin Majumdar, and Ken Natesan. Environmental Effect on Evolutionary Cyclic Plasticity Material Parameters of 316 Stainless Steel: An Experimental & Material Modeling Approach. Office of Scientific and Technical Information (OSTI), September 2014. http://dx.doi.org/10.2172/1168233.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Mohanty, Subhasish, Bipul Barua, William K. Soppet, Saurin Majumdar, and Ken Natesan. Study the Cyclic Plasticity Behavior of 508 LAS under Constant, Variable and Grid-Load-Following Loading Cycles for Fatigue Evaluation of PWR Components. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1331616.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Miller, Matthew. DE-SC0004913: The role of microstructural neighborhoods in forming and evolving slip localization in polycrystalline metals during cyclic plasticity - Final Report. Office of Scientific and Technical Information (OSTI), November 2019. http://dx.doi.org/10.2172/1574005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Mohanty, Subhasish, Bipul Barua, Joseph Listwan, Saurin Majumdar, and Ken Natesan. Final Report on CFD and Thermal-Mechanical Stress Analysis of PWR Surge Line under Transient Condition Thermal Stratification and an Evolutionary Cyclic Plasticity Based Transformative Fatigue Evaluation Approach without Using S~N Curve: Rev. 1. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1480513.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Mohanty, S., W. K. Soppet, S. Majumdar, and K. Natesan. June 2013 Update: Status Report on Assessment of Environmentally Assisted Fatigue for LWR Extended Service Conditions. Summary of 1. Room-Temperature Fatigue Test of 316 SS Specimens and Subsequent Data Analysis for Cyclic Plasticity Constitutive Model Development. 2. Other Ongoing Experimental and Mechanistic Modeling Activities. Office of Scientific and Technical Information (OSTI), July 2013. http://dx.doi.org/10.2172/1110488.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Steudlein, Armin, Besrat Alemu, T. Matthew Evans, Steven Kramer, Jonathan Stewart, Kristin Ulmer, and Katerina Ziotopoulou. PEER Workshop on Liquefaction Susceptibility. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, May 2023. http://dx.doi.org/10.55461/bpsk6314.

Full text
Abstract:
Seismic ground failure potential from liquefaction is generally undertaken in three steps. First, a susceptibility evaluation determines if the soil in a particular layer is in a condition where liquefaction triggering could potentially occur. This is followed by a triggering evaluation to estimate the likelihood of triggering given anticipated seismic demands, environmental conditions pertaining to the soil layer (e.g., its depth relative to the ground water table), and the soil state. For soils where triggering can be anticipated, the final step involves assessments of the potential for ground failure and its impact on infrastructure systems. This workshop was dedicated to the first of these steps, which often plays a critical role in delineating risk for soil deposits with high fines contents and clay-silt-sand mixtures of negligible to moderate plasticity. The workshop was hosted at Oregon State University on September 8-9, 2022 and was attended by 49 participants from the research, practice, and regulatory communities. Through pre-workshop polls, extended abstracts, workshop presentations, and workshop breakout discussions, it was demonstrated that leaders in the liquefaction community do not share a common understanding of the term “susceptibility” as applied to liquefaction problems. The primary distinction between alternate views concerns whether environmental conditions and soil state provide relevant information for a susceptibility evaluation, or if susceptibility is a material characteristic. For example, a clean, dry, dense sand in a region of low seismicity is very unlikely to experience triggering of liquefaction and would be considered not susceptible by adherents of a definition that considers environmental conditions and state. The alternative, and recommended, definition focusing on material susceptibility would consider the material as susceptible and would defer consideration of saturation, state, and loading effects to a separate triggering analysis. This material susceptibility definition has the advantage of maintaining a high degree of independence between the parameters considered in the susceptibility and triggering phases of the ground failure analysis. There exist differences between current methods for assessing material susceptibility – the databases include varying amount of test data, the materials considered are distinct (from different regions) and have been tested using different procedures, and the models can be interpreted as providingdifferent outcomes in some cases. The workshop reached a clear consensus that new procedures are needed that are developed using a new research approach. The recommended approach involves assembling a database of information from sites for which in situ test data are available (borings with samples, CPTs), cyclic test data are available from high-quality specimens, and a range of index tests are available for important layers. It is not necessary that the sites have experienced earthquake shaking for which field performance is known, although such information is of interest where available. A considerable amount of data of this type are available from prior research studies and detailed geotechnical investigations for project sites by leading geotechnical consultants. Once assembled and made available, this data would allow for the development of models to predict the probability of material susceptibility given various independent variables (e.g., in-situ tests indices, laboratory index parameters) and the epistemic uncertainty of the predictions. Such studies should be conducted in an open, transparent manner utilizing a shared database, which is a hallmark of the Next Generation Liquefaction (NGL) project.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Cyclic plasticity' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography