An implicit numerical scheme for cyclic elastoplasticity and ratcheting under plane stress conditions

Chatziioannou, Konstantinos; Karamanos, S.A.; Huang, Yuner

doi:10.1016/j.compstruc.2021.106509

Cited by 5 publications

(6 citation statements)

References 39 publications

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“…The constitutive equations of the cyclic-plasticity model, and their implementation within the finite element environment have been extensively presented in [39], but some key information are summarized in this section for the sake of completeness.…”

Section: Constitutive Modelmentioning

confidence: 99%

“…More information on the integration algorithm and the consistent linearization methodology can be found in a recent publication by the authors [39].…”

Section: Numerical Implementationmentioning

confidence: 99%

“…Towards this purpose, an implicit numerical integration scheme has been developed recently by the authors on the basis of J2 cyclic elasto-plasticity with combined nonlinear hardening, capable of integrating a wide range of cyclic plasticity models and hardening rules under a common computational framework [39]. The numerical scheme accounts explicitly for plane stress conditions, suitable for simulating the mechanical response of piping and other thin-walled structural components using shell type elements.…”

Section: Introductionmentioning

confidence: 99%

“…The numerical scheme accounts explicitly for plane stress conditions, suitable for simulating the mechanical response of piping and other thin-walled structural components using shell type elements. This implicit integration scheme has been presented extensively in [39], together with the corresponding consistent linearization moduli, and its implementation in the finite element software ABAQUS [40].…”

Section: Introductionmentioning

confidence: 99%

“…The current work employs the numerical model presented and validated by the authors in [39], and examines the capabilities of three advanced cyclic plasticity hardening rules in simulating multi-axial ratcheting measured in physical experiments. A set of large-scale experiments on steel pipe elbows subjected to strong cyclic loading, presented elsewhere [41], are considered and simulated numerically to predict their mechanical behavior in terms of force-displacement response, local strain range and accumulation and the corresponding cross-sectional ovalization.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Cyclic Loading on Pipe Elbows Using Advanced Plane-Stress Elastoplasticity Models1

Chatziioannou

Huang

Karamanos

2020

Journal of Pressure Vessel Technology

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The present work investigates the response of industrial steel pipe elbows subjected to severe cyclic loading (e.g. seismic or shutdown/startup conditions), associated with the development of significant inelastic strain amplitudes of alternate sign, which may lead to low-cycle fatigue. To model this response, three cyclic-plasticity hardening models are employed for the numerical analysis of large-scale experiments on elbows reported elsewhere. The constitutive relations of the material model follow the context of von Mises cyclic elasto-plasticity, and the hardening models are implemented in a user subroutine, developed by the authors, which employs a robust numerical integration scheme, and is inserted in a general-purpose finite element software. The three hardening models are evaluated in terms of their ability to predict the strain range at critical locations, and in particular, strain accumulation over the load cycles, a phenomenon called “ratcheting”. The overall good comparison between numerical and experimental results demonstrates that the proposed numerical methodology can be used for simulating accurately the mechanical response of pipe elbows under severe inelastic repeated loading. Finally, the paper highlights some limitations of conventional hardening rules in simulating multi-axial material ratcheting.

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Section: Constitutive Modelmentioning

confidence: 99%

“…More information on the integration algorithm and the consistent linearization methodology can be found in a recent publication by the authors [39].…”

Section: Numerical Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations