在此基础上，建立了腐蚀环境下疲劳裂纹扩展速率试验中裂纹长度的自动检测技术。
On the basis of this, an automatic measurement technique of fatigue crack length in fatigue crack growth rate test under corrosive circumstance is established.
理论分析和试验结果均表明：燃烧室增压速率、脱粘面尺寸、边界条件等因素对脱粘面扩展均有较强的影响。
Theoretical analysis and experiment results prove that the chamber pressurization rate, the debond dimension and the boundary condition have strong effects on the propagation of the debond.
试验结果表明，随着循环温度的增高，裂纹形核孕育期缩短， 裂纹扩展速率增大；
The results have shown that the incubation period of crack nucleation decreases and the propagation rate of crack increases with increasing the cyclic temperature.
根据试验测定的焊缝各区冲击韧性、断裂韧性、疲劳裂纹扩展速率和疲劳裂纹扩展门槛值，对焊缝力学性能作出综合评价。
The mechanical properties of the butt welded joints have been evaluated according to the impulsive and fracture toughness as well as the rate and threshold values of fatigue crack propagation.
结果表明，循环载荷下的裂纹扩展速率对试验频率、载荷比、温度及橡胶夹层厚度反映较敏感。
It was shown that crack growth rate increased as the temperature or limit load rate increased. It was also that crack growth rate decreased as rubber thickness and loading rate increased.
结果表明，循环载荷下的裂纹扩展速率对试验频率、载荷比、温度及橡胶夹层厚度反映较敏感。
It was shown that crack growth rate increased as the temperature or limit load rate increased. It was also that crack growth rate decreased as rubber thickness and loading rate increased.
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