The average strain energy density (ASED) criterion applied to design of notched mechanical components has been achieved a considerable success over the years thanks to its numerous advantages including the need for a relatively coarse mesh, the use of a scalar rather than vector quantity and the ability to compare the strength of parts with different notch angles. It is known that adhesively bonded joints mechanical strength is governed by the stress singularity arising near the intersection between the adhesive‐substrate interface and the free surface of the bonded joint, even without notches. This is due to the different elastic material properties of the adhesive compared to those of the substrate that induces a constitutive stress singularity. This phenomenon makes the strain energy density criterion particularly suitable for the design of bonded joints, as well. This contribution is aimed at applying the ASED criterion to the static strength assessment of bonded joints. Experimental results taken from literature were found in good agreement with those predicted by the ASED approach.

中文翻译：

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通过平均应变能密度标准评估胶粘接头的脆性断裂

多年来，由于其众多优点，包括需要相对粗糙的网格，使用标量而不是矢量数量，以及使用带隙机械部件的设计，平均应变能密度（ASED）准则已获得了相当大的成功。比较具有不同缺口角度的零件强度的能力。众所周知，胶粘接头的机械强度是由胶粘剂-基材界面和胶粘接头的自由表面之间的交点附近产生的应力奇异性决定的，即使没有缺口也是如此。这是由于与导致本构应力奇异性的基底相比，粘合剂的弹性材料性质不同。这种现象也使应变能密度准则也特别适用于粘结接头的设计。该贡献旨在将ASED标准应用于粘合接头的静态强度评估。从文献中获得的实验结果与ASED方法所预测的结果非常吻合。