疲劳测试替补SCC.

恒定负荷 压力测试 电脑控制

高级仪器（AI）的SCC仪器是计算机控制，机电操作的装载装置。装载单元可以执行SSRT测试，恒定负载测试和循环疲劳测试。它是在不同环境条件下调查各种形式的应力腐蚀裂解（SCC）。该系统包括装载单元，基准采集单元，控制系统和测试容器。该设施设计用于恒定负载测试（CL），慢速应变速率测试（SSRT）和低循环疲劳测试（LCF）。计算机控制装有拉伸样品的电机。位移率由操作员的计算机软件指定。通过该软件将在计算机屏幕上显示来自称重传感器的测量值。计算机可自动保存位移和加载数据。数据将以ASCII格式提供进一步的管理。 The instrument fulfills the requirements presented in ASTM Practice G 129. When constant load feature is used, the response of the load cell is used as a feedback signal to control the displacement so that the load cell measurement value is equal to the load set by the operator. The loading device can perform low frequency cyclic fatigue tests. The cyclic loading can be performed either under load or strain control. The shape of the loading can be either of trapeze (a special case: saw tooth) or sinusoidal type. The maximum frequency depends on the amplitude. The basic design of the unit includes a compact non-backlash ball screw driver actuator, with the motor, and a load cell with a digital force indicator.