通过快速裂纹扩展发生断裂，没有明显的宏观变形。
Brittle fracture. Fracture that occurs by rapid crack propagation and without appreciable macroscopic deformation.
前言： 通过分析2003版与1995版国家标准《燃气用埋地聚乙烯管材》，介绍了2003版标准中新增的耐快速裂纹扩展和耐慢速裂纹增长两项重要性能。
The national standard of GB 1555B. 1 "Buried Polyethylene (PE) Piping Systems for the Supply of Gaseous Fuels Part 1: Pipes" of version 2003 and version 1995 were compared in this paper.
得到了快速扩展裂纹的动态应力强度因子。
Finally, the dynamic stress intensity factors of the fast-propagating crack is obtained.
疲劳断口上存在典型的疲劳裂纹萌生区、缓慢扩展区、快速扩展区和最后瞬断区。
The fatigue fractography consists of several different zones, including fatigue crack initiation, slow, fast propagation and final fracture.
疲劳过程中主裂纹的形成消耗了大部分的疲劳寿命，一旦主裂纹形成就快速扩展瞬间断裂。
During the fatigue process, the formation of the main crack expends most of the whole fatigue life, and once the main crack forms, the crack propagates rapidly and fractures immediately.
主要进行了环氧及增韧环氧树脂的断裂韧性及裂纹快速扩展的试验研究。
Fracture toughness and the rapid crack propagation are studied on epoxy and toughed epoxy.
即裂纹源产生于快速加热过程并在随后的快速冷却中得以扩展。
It is pointed out that the source of crack is formed during the fast heating process and expanded following the fast cooling process.
片层组织绝热剪切带与基体的界面塑性流变特征不明显，并且在该区域观察到了呈快速扩展特征的长裂纹。
Investigation indicated that plastic flow characteristic is not obvious at the interface between ASBs and matrix, which observed long crack in lamellar microstructure.
片层组织绝热剪切带与基体的界面塑性流变特征不明显，并且在该区域观察到了呈快速扩展特征的长裂纹。
Investigation indicated that plastic flow characteristic is not obvious at the interface between ASBs and matrix, which observed long crack in lamellar microstructure.
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