用电阻量测方法研究蠕变状态下的金属损伤

本文建议一种量测蠕变下金属损伤的方法。与其它方法相比,这个方法可用于进行在蠕变试验过程中的损伤测量,而无需使试件卸载或冷却。用此方法对试验数据进行加工就可得到在蠕变过程中的试验损伤曲线。对这些曲线的分析导致结论:材料破坏时的损伤是所加应力的递减函数。这一结论是以前所得理论结果的试验验证。

THE INVESTIGATION OF THE METAL DAMAGE AT THE CREEP BY THE METHOD OF ELECTRICAL RESISTANCEMEASURING

In this paper the method of damage measurement of metal structure atthe creep is proposed. In contrast to other methods, it allows to carry out the measurement of this damage in the process of creep test without unloading and cooling of specifens. Experimental damage curves during creep are obtained as a result of test data processing by the suggested method. The analysis of these curves leads to a conclusion that the material damage at rupture is monotonically decreasing function of applied stress. This conclusion is experimental verification of the theoretical results obtained earlier.