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1. 发明申请

WO2006052060A1 EVALUATING METHOD OF THE FRACTURE TOUGHNESS USING THE CONTINUOUS INDENTATION METHOD 审中-公开
标题翻译：使用连续灌注方法评估破裂韧性的方法
公开(公告)号：WO2006052060A1
公开(公告)日：2006-05-18
申请号：PCT/KR2005/003039
申请日：2005-09-14
申请人： FRONTICS, INC. , KIM, Kwang-Ho , LEE, Jung-Suk , SEO, Yang-Won , CHOI, Yeol
发明人： KIM, Kwang-Ho , LEE, Jung-Suk , SEO, Yang-Won , CHOI, Yeol
IPC分类号： G01N3/42
CPC分类号： G01N3/42 , G01N2203/0064 , G01N2203/0078
摘要： The present invention relates to a method of evaluating the fracture toughness of a material using the continuous indentation technique. In the method of this invention, the stress coefficient, strain hardening modulus and yield stress of the material are determined using the continuous indentation technique and, thereafter, the reduced elastic modulus (E r ) of the material is calculated. The effective elastic modulus and the initial elastic modulus are calculated and, thereafter, the damage parameter is calculated using the void volume fraction. The critical elastic modulus and the characteristic fracture initiation point of the indentation depth are determined using the damage parameter and, thereafter, the fracture toughness of the material is evaluated. The present invention is advantageous in that the fracture toughness of a brittle material can be evaluated precisely using a nondestructive evaluation technique.
摘要翻译：本发明涉及使用连续压痕技术评价材料的断裂韧性的方法。在本发明的方法中，使用连续压痕技术确定材料的应力系数，应变硬化模量和屈服应力，然后计算材料的弹性模量（E r）。计算有效弹性模量和初始弹性模量，此后，使用空隙体积分数计算损伤参数。使用损伤参数确定压痕深度的临界弹性模量和特征性断裂起始点，然后评估材料的断裂韧性。本发明的优点在于，可以使用非破坏性评价技术精确地评价脆性材料的断裂韧性。

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