目前,Instron公司生产的电液伺服疲劳试验机在我国已较为普及。虽然机器的0～100％Transducer Full Range已能使机器的测力范围从满量程的100％分别扩展至50％,40％,25％,20％,10％,5％,但若只拥有一台Instron机,某些课题仍不能进行或...目前,Instron公司生产的电液伺服疲劳试验机在我国已较为普及。虽然机器的0～100％Transducer Full Range已能使机器的测力范围从满量程的100％分别扩展至50％,40％,25％,20％,10％,5％,但若只拥有一台Instron机,某些课题仍不能进行或达不到很高的精度。有的单位为了适合不同试验对测力范围的不同要求,用外汇购买了两台甚至多台荷载吨位不同而其他功能均相同的Instron试验机,以满足科研和生产的需要。展开更多
A boundary integral equation method is applied to the study of the interaction of plane elastic waves with a periodic array of collinear inplane cracks.Numerical results are presented for the dynamic stress in- tensit...A boundary integral equation method is applied to the study of the interaction of plane elastic waves with a periodic array of collinear inplane cracks.Numerical results are presented for the dynamic stress in- tensity factors.The effects of the wave type,wave frequency,wave incidence angle,and crack spacing on the dynamic stress intensity factors are analyzed in detail.展开更多
文摘目前,Instron公司生产的电液伺服疲劳试验机在我国已较为普及。虽然机器的0～100％Transducer Full Range已能使机器的测力范围从满量程的100％分别扩展至50％,40％,25％,20％,10％,5％,但若只拥有一台Instron机,某些课题仍不能进行或达不到很高的精度。有的单位为了适合不同试验对测力范围的不同要求,用外汇购买了两台甚至多台荷载吨位不同而其他功能均相同的Instron试验机,以满足科研和生产的需要。
基金The project supported bythe Committee of Science and Technology of Shanghai and Tongji University
文摘A boundary integral equation method is applied to the study of the interaction of plane elastic waves with a periodic array of collinear inplane cracks.Numerical results are presented for the dynamic stress in- tensity factors.The effects of the wave type,wave frequency,wave incidence angle,and crack spacing on the dynamic stress intensity factors are analyzed in detail.
