Damage simulation via tensile and shear failure modes in quasi‐brittle material like concrete is computationally challenging. Multidimensional virtual internal bond (MVIB) method is one of the promising method developed to capture shear failure in materials like concrete. It assumes continuum as an assemblage of material points joined by normal and shear bonds possessing harmonic potential and bond density evolution function, which degrades with deformation to yield at macroscopic level, stress–strain law with inbuilt feature of failure via Cauchy–Born rule. The degradation of bond‐density in MVIB method originally based solely on compressive failure is extended to include tensile failure synonymous with tension and compression asymmetry in concrete. The modified MVIB model is applied to a variety of problems, and the effect of inclusion of both tensile and compressive failure is thoroughly assessed. Through the example of two notches in a square plate subjected to biaxial loading, a systematic study of damage evolution vis‐à‐vis biaxial loading ratio is presented. Capture of crack closure and formation of crack retarding protective shield are unique outcomes of the present work.

中文翻译：

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多维虚拟内键法在混凝土中进行性损伤建模

在像混凝土这样的准脆性材料中，通过拉伸和剪切破坏模式进行的损伤模拟在计算上具有挑战性。多维虚拟内部键合（MVIB）方法是为捕捉混凝土等材料中的剪切破坏而开发的有前途的方法之一。它假定连续体是由具有谐波势和键密度演化功能的法向键和剪切键连接的材料点的集合，其随着形变退化而在宏观水平上屈服，应力-应变定律具有柯西-伯恩定律的固有破坏特征。最初仅基于压缩破坏的MVIB方法中粘结密度的降低被扩展到包括混凝土中的拉伸破坏和压缩不对称性的拉伸破坏。修改后的MVIB模型适用于各种问题，并全面评估了同时包含拉伸和压缩破坏的影响。通过在承受双轴载荷的方形板上的两个槽口的示例，介绍了相对于双轴载荷比的损伤演化系统研究。捕获裂缝闭合和形成抗裂防护罩是当前工作的独特成果。