Numerical Method for Quasi-static and Dynamic Elastoplastic Problems by Symplectic Brezis-Ekeland-Nayroles Non-incremental Principle

Numerical Method for Quasi-static and Dynamic Elastoplastic Problems by Symplectic Brezis-Ekeland-Nayroles Non-incremental Principle
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基于辛 Brezis-Ekeland-Nayroles 非增量原理求解准静态和动态弹塑性问题的数值方法

DOI:
10.1007/978-3-030-48834-5_10
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
G de Saxcé
G de Saxcé
中科院分区:
--
文献类型:
--
作者:
A Oueslati;AD Nguyen;M Stoffel;B Markert;G de Saxcé

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大多数计算机辅助工程软件提供了一个经典的增量计算程序的非线性问题。虽然在文献中很少使用,Brezis-Ekeland-Nayroles(BEN)原则,一个替代的分步算法,基于时间积分的总和的耗散潜力和它的Fenchel极可以有一个整体的看法。简而言之,BEN原理将机械问题转换为约束优化问题。最近,Buliga和de Saxcé提出了一个辛形式的BEN原理,它推广了耗散系统的Hamilton包含形式。在目前的工作中,这种形式主义是专门的小,有限应变,静力学和动力学的标准塑性。本文应用该方法数值求解了静力学和动力学中经典的平面应变圆管内压问题。用BEN方法得到的数值结果与参考数值解之间具有很好的一致性。
Most computer-aided engineering software provide a classical incremental computation procedure for nonlinear problems. Although little used in the literature, the Brezis-Ekeland-Nayroles (BEN) principle, an alternative step-by-step algorithm, based on the time integration of the sum of the dissipation potential and its Fenchel polar can have a global view of whole evolution. In short, the BEN principle converts a mechanical problem to a constrained optimization problem. Recently, Buliga and de Saxcé have proposed a symplectic version of the BEN principle which generalizes the Hamiltonian inclusion formalism for the dissipative systems. In the present work, this formalism is specialized to the standard plasticity in small, finite strains, in statics and dynamics. We apply it numerically to solve the classical problem of a tube problem in plane strain subjected to an internal pressure in statics and dynamics. An excellent agreement is obtained between the numerical results obtained by the BEN approach and the reference numerical solution.
DOI: --
发表时间: 1975
期刊:
影响因子: --
作者:
B. Halphen;Q. Nguyen
通讯作者: Q. Nguyen
将 BREZIS-EKELAND-NAYROLES 原理扩展到单调算子
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
A. Visintin
通讯作者: A. Visintin
辛 Brezis-Ekeland-Nairoles 原理
DOI: 10.1177/1081286516629532
发表时间: 2014
影响因子: 2.6
作者:
Marius Buliga;G. de Saxcé
通讯作者: G. de Saxcé