Computational Technology Resources - CCP

B. Tahar and R.S. Crouch

Department of Civil and Structural Engineering, University of Sheffield, United Kingdom

doi:10.4203/ccp.54.9.2

B. Tahar, R.S. Crouch, "Accurate Stress Return Strategies for Hardening-Softening Plasticity", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 253-259, 1998. doi:10.4203/ccp.54.9.2

Abstract

There exists a strong need to provide accurate, robust nonlinear constitutive models for use in finite element analyses. This paper responds to this need by adding a new hardening and softening capability and a stable stress return algorithm to an existing isotropic plasticity model for concrete based on fracture energy principles. It illustrates the consequences of employing large strain steps, using the much advocated Closest Point Projection method. The need for an iterative bisector scheme is identified, since the standard backward-Euler method and the step-wise scaling scheme used by others can still lead to a lack of convergence in zones associated with high curvature in the deviatoric planes.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 54 ADVANCES IN FINITE ELEMENT PROCEDURES AND TECHNIQUES Edited by: B.H.V. Topping Paper IX.2 Accurate Stress Return Strategies for Hardening-Softening Plasticity B. Tahar and R.S. Crouch Department of Civil and Structural Engineering, University of Sheffield, United Kingdom doi:10.4203/ccp.54.9.2 purchase the full-text of this paper Full Bibliographic Reference for this paper B. Tahar, R.S. Crouch, "Accurate Stress Return Strategies for Hardening-Softening Plasticity", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 253-259, 1998. doi:10.4203/ccp.54.9.2 Abstract There exists a strong need to provide accurate, robust nonlinear constitutive models for use in finite element analyses. This paper responds to this need by adding a new hardening and softening capability and a stable stress return algorithm to an existing isotropic plasticity model for concrete based on fracture energy principles. It illustrates the consequences of employing large strain steps, using the much advocated Closest Point Projection method. The need for an iterative bisector scheme is identified, since the standard backward-Euler method and the step-wise scaling scheme used by others can still lead to a lack of convergence in zones associated with high curvature in the deviatoric planes. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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