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1)  creep crack growth rate (CCGR)
蠕变裂纹扩展率
1.
A theroretical equation for the calculation of creep crack growth rate (CCGR) has also been derived.
根据局部损伤理论和相似原理 ,给出了蠕变裂纹启裂前的孕育上下限时间并推导了蠕变裂纹扩展率方程。
2)  creep crack growth rate
蠕变裂纹扩展速率
3)  creep crack growth
蠕变裂纹扩展
1.
How to charcterize the creep crack growth with appropriate fracture mechanics parameters is rather challenging to the structural integrity assessment in the presence of weld interface.
为此建议对ASTME145 7推荐的C 计算式进行修正 ,以正确演绎焊接试样的蠕变裂纹扩展行为。
4)  creep-fatigue crack growth
疲劳-蠕变裂纹扩展
5)  Crack growth rate
裂纹扩展率
1.
Based on the theory of time dependent fracture mechanics, a method for calculating creep crack growth rate is presented, including the parameters at crack tip related to time dependent fracture mechanics.
介绍了时间相关断裂力学有关的裂纹尖端参数,指出用参数Ct,av作为衡量蠕变裂纹扩展的参数是适宜的;讨论了疲劳对蠕变裂纹扩展的影响,指出材料的疲劳屈服极限和抗蠕变能力是决定这种影响大小的主要因素;并给出了蠕变裂纹扩展率的计算公
6)  creep crack
蠕变裂纹
1.
Studies were made on the nucleation of creep cavities and propagation of creep cracks in steel 20Cr11MoVNbNB at 550-650℃.
研究了20Cr11MoVNbNB马氏体热强钢在550—65℃范围内蠕变孔洞的形成及蠕变裂纹的发展发现蠕变孔洞主要在原奥氏体晶界和原板条马氏体边界上的淬火未溶大颗粒Nb(C,N)及M23C6碳化物处形成,孔洞在原奥氏体晶界形成倾向不占优势:蠕变裂纹沿垂直应力方向横穿原奥氏体晶界及原板条马氏体边界向晶内扩展,最终导致穿晶断裂。
2.
Because the pendent reheater tubes were subjected to thermal shock of steam blown by a sootblower during service,the thermal fatigue crack on outside surface was caused,and the creep crack adjacent to inner surface subsequently appeared.
管材在运行中遭受吹灰蒸汽的热冲击,外壁因此出现热疲劳裂纹,随后内壁金属衍生出蠕变裂纹。
补充资料:裂纹失稳扩展
分子式:
CAS号:

性质:材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。

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