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Crack-tip force method for computing energy release rate in delaminated plates

机译:裂纹尖端力计算分层板中能量释放率的方法

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摘要

A new method called the crack-tip force method (CTFM) is derived for computing the energy release rate in delaminated beams and plates. In this method the delaminated plate is divided into two laminates on either side of the plane of delamination. The interaction forces, called crack-tip forces, between the sub-laminates at the crack-tip are computed. The energy release rate is ex- pressed as a quadratic function of the crack-tip forces and the plate compliance coefficients. The CTFM is compared to the virtual crack closure technique (VCCT) as well as to a previously derived method called the strain energy density method using double cantilevered beam specimens as examples.
机译:推导了一种称为裂纹尖端力法(CTFM)的新方法,用于计算分层梁和板中的能量释放率。在这种方法中,将分层的板在分层平面的任一侧分成两个层压板。计算在裂纹尖端的子层压板之间的相互作用力,称为裂纹尖端力。能量释放率表示为裂纹尖端力和板柔度系数的二次函数。将CTFM与虚拟裂纹闭合技术(VCCT)以及先前导出的称为应变能密度方法的方法进行了比较,该方法使用双悬臂梁样本作为示例。

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