中文摘要：

绝热条件下,通过红外热像技术对A3钢试样弹性阶段循环加载实验进行表面温度变化的实时观测。结果发现,试件表面温度在循环加载过程中出现相应的周期性变化,而且随着荷载增大,整体温度变化越大,在相同的加载频率情况下应力、应变与温度变化成正比。通过热弹性理论与实验结果对比,表明在绝热条件下试件受拉时表面温度会降低,试件受压时表面温度会升高。红外热像技术具有非接触式测量、实时同步观测、不影响设备运行等特点,为研究复杂构件材料应力分布问题提供了新的实验测量手段。

英文摘要：

As fast development of many fields referred to aerospace,automotive industry,electronic industry,nuclear energy application and rocket technology,there are a lot of urgent problems to be solved. These problems are difficult to be settled through elementary method of material mechanics in measurement of the complex components stress distribution. Method of infrared thermal imaging technology was adopted by cyclic loading experiments,obtaining temperature changes of the sample surface in situ observation adiabatically. Results found that specimen surface temperature periodically changes in corresponding process of cyclic loading. As load increasing,temperature change also enlarges. The stress and strain are proportional to temperature difference under the same loading frequency. Comparing with the thermal elasticity theory,experimental results found that specimen temperature decreases during the tensile loadings,and it rises during the compressive loading under the adiabatic condition. The method with the characteristics of non-contact measuring,real-time analysis and no-effect to equipment operation is presented as a new experimental type in the study of complex components stress issues.