基于广义损伤张量正则化的有限应变各向异性脆性损伤模型

IF 4 2区 工程技术 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Tim van der Velden, Stefanie Reese, Hagen Holthusen, Tim Brepols
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引用次数: 0

摘要

本文建立了有限应变下各向异性损伤非局部建模的通用框架。通过结合最近的两项工作,新的框架允许将不同的已建立的超弹性有限应变材料配方灵活地结合到各向异性损伤中,同时通过采用一组通用的微形态梯度扩展来确保网格无关的结果。首先,研究了一般满足损伤增长准则的各向异性损伤模型在单单元上的新hookean材料的具体选择。接下来,将该模型与不同的梯度扩展应用于非对称缺口试件的结构模拟中,以确定体积偏差正则化形式的有效选择。因此,本文所提出的具有体积偏差梯度扩展的新hookean材料的通用框架,成功地应用于压力加载转子叶片的复杂模拟。主要子程序的代码可在https://doi.org/10.5281/zenodo.11171630上获得。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An anisotropic, brittle damage model for finite strains with a generic damage tensor regularization
This paper establishes a generic framework for the nonlocal modeling of anisotropic damage at finite strains. By the combination of two recent works, the new framework allows for the flexible incorporation of different established hyperelastic finite strain material formulations into anisotropic damage whilst ensuring mesh-independent results by employing a generic set of micromorphic gradient-extensions. First, the anisotropic damage model, generally satisfying the damage growth criterion, is investigated for the specific choice of a neo-Hookean material on a single element. Next, the model is applied with different gradient-extensions in structural simulations of an asymmetrically notched specimen to identify an efficient choice in the form of a volumetric–deviatoric regularization. Thereafter, the generic framework, which is without loss of generality here specified for a neo-Hookean material with a volumetric–deviatoric gradient-extension, successfully serves for the complex simulation of a pressure-loaded rotor blade. The codes of the material subroutines are accessible to the public at https://doi.org/10.5281/zenodo.11171630 .
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来源期刊
International Journal of Damage Mechanics
International Journal of Damage Mechanics 工程技术-材料科学:综合
CiteScore
8.70
自引率
26.20%
发文量
48
审稿时长
5.4 months
期刊介绍: Featuring original, peer-reviewed papers by leading specialists from around the world, the International Journal of Damage Mechanics covers new developments in the science and engineering of fracture and damage mechanics. Devoted to the prompt publication of original papers reporting the results of experimental or theoretical work on any aspect of research in the mechanics of fracture and damage assessment, the journal provides an effective mechanism to disseminate information not only within the research community but also between the reseach laboratory and industrial design department. The journal also promotes and contributes to development of the concept of damage mechanics. This journal is a member of the Committee on Publication Ethics (COPE).
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