Also,the atoms' displacements and bond stretching strain indicate that the scale effect and the material damage exist around the tip of a crack before crack extension.
另外,所得的原子位移和键长应变也表明,不但裂纹尖端断裂性质的研究必须考虑从宏观描述到微观描述相互转化的尺度效应,而且在裂纹扩展之前的裂纹尖端附近存在宏观连续介质力学所关注的损伤区。
参考来源 - 石墨层σ键与裂纹扩展的关系研究和预测The crack extension is simulated, and the stress distribution of the tip of cracks is determined. Furthermore, the size of critical cracks is calculated, the fatigue life is calculated and the safety capability is evaluated.
应用有限元软件ANSYS来模拟裂纹扩展,得到裂纹尖端应力分布情况等,进而确定临界裂纹的大小,最后计算嫩江钢桥的剩余寿命以及对其使用安全进行评估。
参考来源 - 公路钢桁桥安全性能评估研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The stress field near crack tip is an important factor to effect crack extension.
裂纹缺陷周围的应力变形场是影响裂纹扩展的重要因素。
This treatment has an effect on delaying the crack extension and hence suppressing its cracking.
这一处理方法起到延缓裂纹扩展、抑制起裂的效果。
Change of section appearance is related to stress concentration of glass fiber on the base resin and on hindering of crack extension.
断面形貌的变化与玻纤在基体树脂中的应力集中作用及对裂纹扩展的阻碍作用有关。
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