A Global-Local Strategy for the Elastoplastic Analysis of Complex Metallic Structures via Component-Wise Approach

E. Carrera, I. Kaleel, M. Nagaraj, M. Petrolo
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引用次数: 1

Abstract

A global-local approach has been developed for the elasto-plastic analysis of thin-walled metal structures, which interfaces between commercial finite element software and advanced structural theories based on the Carrera Unified Formulation (CUF). The structure is modeled in CUF using the Component-Wise approach where Lagrange polynomials enhance the cross-section kinematics of the beam element. The von Mises constitutive model with isotropic work hardening is used to describe the material nonlinearity. Two types of the global-local approach have been discussed: (1) elastoplasticity is considered in both global and local analyses, and (2) a linear global analysis is followed by a nonlinear local analysis. It is shown that the second version maintains the accuracy of the solution for cases where the plastic zone is localized within the structure. The described approach results in a significant reduction in the computational size of the problem, compared to standard 3D finite element analysis.
基于构件方法的复杂金属结构弹塑性分析的全局-局部策略
基于Carrera统一公式(CUF),将商业有限元软件与先进的结构理论相结合,提出了薄壁金属结构弹塑性分析的全局-局部方法。该结构在CUF中使用组件智能方法建模,其中拉格朗日多项式增强了梁单元的截面运动学。采用各向同性加工硬化的von Mises本构模型来描述材料的非线性。讨论了两种类型的全局-局部方法:(1)在全局和局部分析中都考虑了弹塑性;(2)线性全局分析之后是非线性局部分析。结果表明,对于塑性区局限于结构内部的情况,第二种方法保持了解的准确性。与标准的三维有限元分析相比,所描述的方法大大减少了问题的计算量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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