应变局部化的韧性破坏:高度非比例载荷历史条件下材料和结构的计算研究

IF 3.4 3区 工程技术 Q1 MECHANICS
Martin Kristoffersen, David Morin, Tore Børvik, Odd Sture Hopperstad
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引用次数: 0

摘要

本文利用应变局部化理论的不完善版本,研究了非比例载荷路径后应变局部化的韧性破坏。计算框架假定均质固体内部存在平面多孔缺陷带,用于研究由空洞成核、生长和凝聚引起的韧性破坏。根据单个单轴拉伸试验和有限元模拟对定位分析框架进行了校准。尽管校准略显节俭,但定位分析成功地再现了缺口拉伸试验和缺口压缩拉伸试验中实验测量的宏观断裂应变。随后,该方法被应用于一个涉及大变形和复杂载荷路径的结构问题,其结果显示了未来工作的巨大前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ductile failure by strain localisation: A computational study of materials and structures subjected to highly non-proportional load histories
Ductile failure by the onset of strain localisation after non-proportional load paths is investigated herein by using the imperfection version of the strain localisation theory. A computational framework assuming a planar, porous imperfection band inside a homogeneous solid was used to investigate ductile failure as caused by void nucleation, growth, and coalescence. The localisation analysis framework was calibrated based on a single uniaxial tension test and finite element simulations thereof. Despite the somewhat frugal calibration, the localisation analyses successfully reproduced experimentally measured macroscopic fracture strains from notched tension tests and notched compression–tension tests. The method was subsequently applied to a structural problem involving large deformations and complex load paths, and the results show great promise for future work.
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来源期刊
CiteScore
6.70
自引率
8.30%
发文量
405
审稿时长
70 days
期刊介绍: The International Journal of Solids and Structures has as its objective the publication and dissemination of original research in Mechanics of Solids and Structures as a field of Applied Science and Engineering. It fosters thus the exchange of ideas among workers in different parts of the world and also among workers who emphasize different aspects of the foundations and applications of the field. Standing as it does at the cross-roads of Materials Science, Life Sciences, Mathematics, Physics and Engineering Design, the Mechanics of Solids and Structures is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from the more classical problems of structural analysis to mechanics of solids continually interacting with other media and including fracture, flow, wave propagation, heat transfer, thermal effects in solids, optimum design methods, model analysis, structural topology and numerical techniques. Interest extends to both inorganic and organic solids and structures.
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