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A mixed time integration scheme for virtual fabrication of steel plate girders

机译：虚拟制造钢板梁的混合时间积分方案

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摘要

In this paper the use of mixed time integration is proposed to increase the efficiency of welding simulation. A technique similar to the one commonly used in sheet metal forming is applied to the welding of steel plates. The welding procedure can be divided into two very distinguishable parts with significantly different characteristics. The first part, the phase of the actual welding, is a fast paced, rapidly changing process that involves highly nonlinear material behavior. The second part, the phase of cooling down, is a slow paced, slowly changing process that does not result in dramatic changes in the material behavior. In this project, explicit time integration was used for the thermo-mechanical analysis of welding and implicit time integration was proposed for the subsequent cooling phase. This paper presents examples based on the conventional fully implicit solution and the proposed explicit integration solution using the finite element codes ABAQUS/Standard and ABAQUS/Explicit, respectively.
机译：本文提出了使用混合时间积分来提高焊接仿真效率的方法。将类似于钣金成型中常用的一种技术应用于钢板的焊接。焊接过程可以分为两个非常不同的部分，它们具有明显不同的特性。第一部分是实际焊接的阶段，它是一个节奏快，变化快的过程，涉及高度非线性的材料行为。第二部分是冷却阶段，是一个缓慢的节奏，缓慢变化的过程，不会导致材料性能的急剧变化。在该项目中，显式时间积分用于焊接的热机械分析，而隐式时间积分则用于后续的冷却阶段。本文分别介绍了基于常规完全隐式解决方案和使用有限元代码ABAQUS / Standard和ABAQUS / Explicit提出的显式集成解决方案的示例。

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