Modelling complex cracks with finite elements: a kinematically enriched constitutive model

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• 作者：Vinh Phu Nguyen ; Giang Dinh Nguyen ; Chi Thanh Nguyen…
• 关键词：Cohesive crack ; Finite elements ; Kinematically enriched constitutive model ; Quasi ; brittle ; Cohesive interface elements
• 刊名：International Journal of Fracture
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：203
• 期：1-2
• 页码：21-39
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Characterization and Evaluation of Materials; Classical Mechanics; Civil Engineering; Automotive Engineering; Mechanical Engineering;
• 出版者：Springer Netherlands
• ISSN：1573-2673
• 卷排序：203

文摘

A continuum constitutive framework with embedded cohesive interface model is presented to describe the failure of quasi-brittle materials. Both cohesive behaviour for cracking inside the fracture process zone and elastic bulk behaviour are treated at integration points making implementation straightforward. In this sense, the proposed approach is simpler than existing ones that focus on element enrichments, such as the extended finite element method, while share similarities with smeared crack models, and offers the capability to correctly model quasi-brittle failure in post-peak regime at constitutive level. In this work, the formulation is introduced, numerical algorithms described and static and dynamic fracture simulations with complex crack patterns are conducted to demonstrate the capability and advantage of the proposed approach.