Analytic formulas of energy release rates for delamination using a global-local method

作者：Luo Quantian; Tong Liyong^*

来源：International Journal of Solids and Structures, 2012, 49(23-24): 3335-3344.

DOI：10.1016/j.ijsolstr.2012.07.005

• Delamination
• Mode partition
• Energy release rate
• Analytic solution

This article presents analytic solutions of energy release rates of a cracked laminate by using a global-local method. Deformations of a cracked laminate subjected to pure bending moments are analyzed and then a new mode partition equation is proposed. By using this partition equation, closed-form solutions of energy release rates G(I) and G(II) are derived by using a global method. For a cracked laminate subjected to axial forces and bending moments, a local method based on the crack-tip force model is used and the unknown coefficient is solved by combining the present analytic solutions for the bending moment loading case. Numerical results of the mode mixity predicted by the present closed-form formulations correlate well with those numerically calibrated on the basis of the singular field and crack-tip force models.

• 出版日期2012-11-15