Superposition integral method for deriving stress intensity factor under impact loading

作者：Dai Feng; Wang Qizhi^*

来源：Journal of Vibration and Shock, 2005, 24(3): 89-95.

• Convolution integral
• Cracked structure
• CSTBD specimen
• Duhamel integral
• Dynamic stress intensity factor
• Superposition integral
• Time independent system

The superposition integral method used for getting response of linear time-independent system to solve the dynamic stress intensity factor for the cracked structure is introduced. The procedure may be first to get the unit impulse response of structure, then to make convolution integral convolution integral with the differential coefficient of load. The accuracy of the superposition integral method is proved theoretically and numerically. In the test of dynamic initiation-fracture toughness, especially in the experimental-numerical method dealing with the test data for the same set of specimens, the superposition integral method can avoid repeated numerical calculations efficiently and reduce the computational work.

• 出版日期2005
• 单位四川大学