The strain energy release rate of the crack propagation was calculated by using virtual crack closure technique, and fatigue life was forecasted.

采用虚拟裂纹闭合技术计算裂纹扩展的应变能释放率，并对裂纹扩展寿命进行计算。

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The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.

本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。

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Objective:To investigate the changes of right ventricular velocities, strain and strain rate in patients with atrial septal defect(ASD)after transcatheter closure.

目的：运用二维超声斑点追踪技术评价经皮房间隔封堵术前后患者右心室运动速度、应变及应变率的急性期变化。

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London has seen local authority maintained facilities falling from 486 in 2000 to 401 in 2011, which meant it had "a closure rate twice that of the country as a whole", the Health and Public Services Committee report said.

BBC: Call for London 2012 toilet map