论文部分内容阅读
高速飞机及飞航导弹在飞行过程中受到气动力的快速加热和快速加载.为了最充分地利用结构材料强度进行合理设计,必须研究金属结构材料在快速加载、快速加热下的力学性能.本文叙述了一种短时高温拉伸试验设备;这设备能以小于85 kg/s的速率对试件进行恒速加载,以小于80℃/s的速率进行快速升温;试件50mm标距内温度梯度小于5℃;整个加热控温过程和应力应变测量记录过程均系自动进行.在此设备上可进行高温快速拉伸和短时蠕变等实验,并已进行了低碳钢,等材料的短时拉伸、短时蠕变、恒裁等加热率的实验.文内列有图表,并对结果进行了初步讨论.
High-speed aircraft and flight-guided missiles are rapidly heated and rapidly loaded by aerodynamics during flight.In order to make full use of the strength of the structural materials for rational design, the mechanical properties of the metallic structural materials under rapid loading and rapid heating must be studied. A short-term high-temperature tensile testing equipment; the device can be loaded at a constant rate of less than 85 kg / s specimen at a rate of less than 80 ℃ / s rapid temperature; specimen 50mm gauge temperature gradient Less than 5 ℃, the whole process of heating temperature control and stress and strain measurement are automatically carried out in this device can be high temperature rapid tensile and short-term creep experiments, and has been a low-carbon steel, and other materials short When tensile, short-term creep, constant cutting and other heating rate experiment.Art listed in the chart, and the results of a preliminary discussion.