Selective Activation of Intrinsic Cohesive Elements
Selective Activation of Intrinsic Cohesive Elements作者机构：School of Civil Engineering Chungbuk National University Cheongju Chungbuk Korea Department of Mechanical & Industrial Engineering Montana State University Bozeman MT USA
出 版 物：《Journal of Applied Mathematics and Physics》 (应用数学与应用物理（英文）)
年 卷 期：2014年第2卷第12期
页 面：1061-1068页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Intrinsic CZM Arbitrary Crack Propagation Added Compliance Selective Activation Multi-Point Constraint
摘 要：In this paper, a selective activation strategy is studied in order to alleviate the issue of added compliance in the intrinsic cohesive zone model applied to arbitrary crack propagation. This strategy proceeds by first inserting cohesive elements between bulk elements and subsequently tying the duplicated nodes across the interface using controllable multi-point constraints before the analysis begins. Then, during the analysis, a part of the multi-point constraints are selectively released, thereby reactivating the corresponding cohesive elements and allowing cracks to initiate and propagate along the bulk element boundaries. The strategy is implemented in Abaqus/Standard using a user-defined multi-point constraint subroutine. Analysis results indicate that the strategy significantly alleviates the added compliance problem and reduces the computation time.
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