用虚拟裂纹模型分析普通断裂力学方法对胶结材料的可用性

Applicability of the Ordinary Approaches of Fracture Mechanics for Cementitious Materials Is Analysed with the Fictitious Crack Model

线弹性断裂力学、J积分、COD和R曲线分析方法可用来分析混凝土这类胶结材料,但在这些普通断裂力学分析方法上得到的试验数据常有矛盾之处.本文论述了与试验较为吻合的虚拟裂纹模型,并以此模型为基础,讨论了普通断裂力学分析方法对胶结材料的适用性.

This kind of Cemantitious material such as concrete is freguently analysed by liner elastic fracture,the J-integral, the COD-apprpach and R-curves.But the test data concerning Kc, Gc, Jc, COD, and R-Curves are often contradictory.This paper presents the Fictitious Crack Model in good agreement with experimental results, and the applicability of the ordinary approaches of fracture mechanics of cementitious materials is discussed with this model.