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1·So, it is doubtful to directly use the J -integral as a fracture criterion in heterogeneous welded joints.

因此，在非均质焊接接头中直接应用J积分作为断裂判据不合适。

2·The J-integral fracture criterion based on HRR theory has been widely used in the studies of elastic-plastic fracture of materials.

在弹塑性断裂研究中广泛地采用着J积分断裂判据，这种判据的基础是HRR理论。近些年来，一些研究者基于数值分析和试验研究对HRR理论的适用性进行了讨论。

3·The application of the maximum tensile criterion to V-notch and the size effect of the fracture criterion of mixed mode are also discussed.

讨论了最大拉应力理论在V形切口中的应用问题； 并探讨了复合型断裂准则的尺寸效应。

4·To accurately predict the forming limit in aluminum alloy sheet forming, ductile fracture criterion is introduced into numerical simulation.

为了准确地预测铝合金板材成形极限，将韧性断裂准则引入到数值模拟中。

5·Using the ductile fracture criterion as the reference for judging the limit height of the process to put the necessary simulation results into the criterion.

并利用韧性断裂准则作为胀形高度极限的判断依据，将模拟得到的必要数据代入到准则中。

6·This article establishes a fracture criterion of crack type I under quasi-state conditions and brings forward a new concept and an expression of surface energy.

本文建立了准静态情况下I型裂纹的断裂准则，提出了新的表面能概念及其表达式。

7·The findings indicate that the brittle fracture criterion for V-notches with single singularity is valid and simple, so it can be applied to engineering conveniently.

结果表明所给出的单奇异性V形切口的脆性断裂准则有效、简单且便于工程应用。

8·For the strip mill roll which has complex structure, stress and crack, based on the stress intensity factor to fracture criterion is an effective way to judge fracture.

对于结构、受力及裂纹形态比较复杂的板带轧机轧辊，采用基于应力强度因子的判据是判断断裂的有效方法。

9·As an example, the results for mild steel indicate that the complete-fracture criterion derived in this article could be better to explain the experimental results given by and Chen et al.

以软钢为算例，本断裂判据可以比较好地解释和陈大年等给出的实验结果。

10·They are mainly concerned with the tensile and compressive behavior, energy absorption, dynamic impact, failure criterion and constitutive relation, creep, fatigue and fracture of these materials.

这些工作主要讨论了金属泡沫材料的拉伸、压缩、能量吸收、动态冲击、失效准则、本构关系、蠕变、疲劳和断裂等力学性能。