在数值流形法中采用三维接触算法进行结构冲击模拟

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Qiumeng Ouyang , Xiaoying Zhuang , Timon Rabczuk , Youjun Ning , Ge Kang , Pengwan Chen
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引用次数: 0

摘要

结构冲击往往伴随着大量接触,并导致复杂的力学现象。在固体力学中,提出了数值流形法(NMM),通过利用包含数学和物理覆盖的双重覆盖系统来解决具有连续-非连续转换特征的问题。本研究基于基于覆盖的接触理论,为 3DNMM 设计了一种惩罚接触算法,并将其应用于冲击力学问题。首先通过自由落体块和碰撞块校准了所开发的接触算法的精度。系统研究了接触参数对接触收敛性的影响,并初步提出了如何设置接触参数的三个标准。通过在块碰撞过程中保持系统动量,验证了接触算法的有效性。随后,将接触算法应用于泰勒杆和汽车-路灯碰撞模拟,进一步证实了其在模拟高速碰撞、大位移和大变形结构时的有效性。通过比较 3DNMM 与 Abaqus 的结果,本研究开发的接触算法在解决碰撞问题方面表现优异,其结果与商业软件一致。本研究成果验证了所提出的接触算法在解决结构动态碰撞问题中的适用性和准确性。本研究还为碰撞问题中的接触参数设置提供了指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Implementation of three-dimensional contact algorithm in numerical manifold method for the structural impact simulation

Structural impact often accompanies large amounts of contacts and leads to complex mechanical phenomena. In solid mechanics, the numerical manifold method (NMM) is proposed to address problems featuring continuous-discontinuous transitions by utilizing a dual coverage system encompassing both mathematical and physical covers. In the present work, a penalty contact algorithm for 3DNMM based on cover-based contact theory is programmed and applied to impact mechanics problems. The accuracy of the developed contact algorithm is firstly calibrated through free-falling blocks and collision blocks. The influence of contact parameters on contact convergence is systematically studied, and three preliminary criteria for how to set contact parameters are provided. The effectiveness of the contact algorithm is verified by conserving system momentum during block collisions. Subsequently, the contact algorithm is applied to Taylor rod and car-streetlight impact simulation, further confirming its effectiveness in modeling high-speed collisions, large displacements, and large deformations of structures. By comparing the 3DNMM results with those from Abaqus, the contact algorithm developed here performs exceptionally well in solving collision problems and produces results consistent with commercial software. The research results in the present work verify the applicability and accuracy of the proposed contact algorithm in solving structural dynamic impact problems. The present work also provides guidance for contact parameter setting in impact problems.

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来源期刊
International Journal of Impact Engineering
International Journal of Impact Engineering 工程技术-工程:机械
CiteScore
8.70
自引率
13.70%
发文量
241
审稿时长
52 days
期刊介绍: The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications
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