冰的弹塑性断裂韧性测定方法的研究

提出了一种测定冰的弹塑性断裂韧性Ｊ积分的实验方法。分别用光弹法及散斑法测出试件的应力场及位移场，然后通过回路Ｊ积分得到冰的断裂声望生实测值。通过淡水冰试件进行的实例，两条积分回路的Ｊ积分值相对误差小于６％。．

Method for Determining Elasto-plastic Fracture Toughness of Lce

An experimental method for measuring elasto-plastic fracture toughness J-Integral of ice is presented. The photoelastic method and the speckle technique are sued for measuring the stress and displacement field respectively. The fracture toughness value of ice is obtained by the round-path defined J-Integral, A group of speciments made of fresh water have been measured. The J-Integral values by two difforent pathes are rather closed, their relative error is less than 6%.