简易机械式蠕变测试结构的开发

Development of a simple mechanical creep testing equipment

设计了一款机械式蠕变测试结构,用于搜集金属和非金属样条的蠕变力学行为。首先,采用盒型有导轨可伸长测试工装,可以保证测试方向不变,减少测试过程中样品的扭曲;其次,通过设计较小的空间和可实时反馈的温控系统,以及使用重锤形成的恒定的拉力,实现了稳定高精度的测试条件;再次,通过将标距设置为100 mm,采集位移的分辨率为0.5 mm,可得到精确到每0.5%的蠕变应变。此外,设计了保护装置,降低潜在的安全风险。所设计的结构为蠕变测试提供了一个简易、低成本的设备方案。

This paper describes the design of a mechanical creep testing equipment for collecting the creep mechanical behavior of both metallic and non-metallic specimens.Firstly,a box-type test fixture with guide rails and extendable features is employed to ensure that the testing direction remains constant,minimizing distortion of the specimen during the testing process.Secondly,stable and high-precision testing conditions are achieved through the design of a real-time feedback temperature control system in a compact space,and the application of a constant tensile force generated by a heavy object composed of various weights.Furthermore,by setting the gauge length of specimen to 100mm and collecting displacement data with a resolution of 0.5mm,creep strain with accuracy of every 0.5%can be obtained.Additionally,protective measures have been incorporated to reduce potential safety risks.The equipment designed in this article provides a simple and low-cost device solution for creep testing.