摘要
用岩石破坏过程分析数值软件(FRPA),对三点弯曲、圆环劈裂和圆环水压致裂3种间接拉伸试验进行数值模拟,通过不同试验条件下得到的试验结果,对各试验方法相对应的抗拉强度求解公式的使用条件给出建议。结果表明:求解抗拉强度的每个计算公式都有其相对应的应用条件,有明显的尺寸效应;影响三点弯曲法求解抗拉强度的因素较多,但计算公式本身并未完全体现出来;圆环水压致裂法影响因素少,适用性强,准确性高。
The RFPA （Rock Failure Process Analysis） code was used to make the numerical simulation of indirect tensile tests of three points bend, cirque crack and cirque hydraulic pressure crack. Suggestion was made on the application conditions of the tensile strength formula for each test method based on the obtained test results under different test conditions. The test results show that each formula for tensile strength has its own corresponding application conditions and has evident dimensional effect. The factors influencing the solution of the tensile strength in three-point bend method are many and are not all embodied in the calculation formula while the cirque hydraulic pressure crack method has few influencing factors, strong applicability and high accuracy.
出处
《金属矿山》
CAS
北大核心
2007年第4期12-15,共4页
Metal Mine
基金
国家自然科学基金项目(编号:40638040
10672028)。
关键词
FRPA
抗拉强度
三点弯曲
圆环劈裂
圆环水压致裂
FRPA, Tensile strength, Three-point bend, Cirque crack, Cirque hydraulic pressure crack
作者简介
段东（1979-），男，东北大学，博士，116622辽宁省大连市大连大学材料破坏与力学数值实验研究中心。
