设计了一个紧固系统，以监测铸态试件作为螺母构件的夹紧力保持情况。开发该系统是为了模拟热循环汽车紧固系统中遇到的应力和应变条件。在这些条件下测试了两种镁合金和一种铝合金。本文描述了实验室测试程序和评估方法。

A fastening system was designed to monitor clamp load retention by as cast coupons as nut members. The system was developed to simulate stress and strain conditions as encountered in thermo-cycled automotive fastening systems. Two magnesium alloys and an aluminum alloy were tested under these conditions. A description of the laboratory test procedure and evaluation methodology are reported in this paper.