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一、前言所谓材料试验机的万能性一般只有三种功能:单向拉伸、单向压缩和抗弯试验.我所用于断裂力学试验研究的600吨万能材料试验机(以下简称600吨试验机)也不例外。考虑到实际工程使用的压力容器壳体是双向应力状态,若能利用600吨试验机施位大、夹头宽度大的特点,对该机的功能加以扩充,使之能进行双向拉伸试验。那么,试验时的应力状态就更加符合压力容器壳体的应力状态,以便有效地研究含裂纹构件的破坏规律。
I. Introduction The so-called material testing machine versatility generally has only three functions: one-way stretch, one-way compression and bending test. I used for fracture mechanics test 600 tons of universal testing machine (hereinafter referred to 600 tons testing machine )No exception. Taking into account the actual project of the pressure vessel shell is a two-way stress state, if we can use 600 tons of test machine Shi Shi large, wide chuck width of the function of the aircraft to be expanded so that the biaxial tensile test. Then, the stress state of the test is more in line with the stress state of the pressure vessel shell in order to effectively study the failure of cracked components.