通过拉伸试验得到TC4钛合金载荷-位移曲线,研究反向标定法确定GTN孔洞损伤模型参数.通过有限元模拟,研究GTN模型6个待定参数对模拟结果的影响.结果表明,参数fo和fN需要通过反向标定法确定,εn可由拉伸试验确定,Sn可通过计算确定,fc和fF可由模拟结果直接给出;TC4钛合金的孔洞损伤随颈缩过程的产生迅速发展,直至断裂.
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