复合型脆断的应变能判据

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The Strain Energy Criterion of Mixed-Mode Brittle Fracture

摘要: 本文提出一个十分简单的复合型脆断判据,即应变能判据。该判据可以表示成:(K_Ⅰ/K_Ⅰc)²+(K_Ⅱ/K_ⅡC)²+(K_Ⅲ/K_ⅢC)²=1,它与文献中的实验数据非常一致,是一个实用的判据。本文还提出一个经验判据:(K_Ⅰ/K_Ⅰc)^m+(K_Ⅱ/K_ⅡC)ⁿ=1,1≤≤2。

Abstract: In this paper, we proposed a new cr tenon or mixea-moae brittle fracture, i.e., the strain energy criterion, which can be stated as (K_Ⅰ/K_Ⅰc)² +(K_Ⅱ/K_Ⅱc)²+(K_Ⅲ/K_Ⅲc)²=1. This criterion is shown to be in good agreement with known experimental data.In this paper, an experimental criterion:(K_Ⅰ/K_Ⅰc)^m+(K_Ⅱ/K_Ⅱc)ⁿ=1, 1≤≤2.is also proposed.

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