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金属电学针尖杨氏模量高温特性研究
Study of High Temperature Young’s Modulus Properties of Electrical Metal Probes

DOI: 10.12677/APP.2023.1311046, PP. 430-438

Keywords: 金属探针,温度场,杨氏模量,有限元法
Metal Probes
, Temperature Field, Young’s Modulus, Finite Element Method

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Abstract:

在航天航空等极端条件中部分电学器件需要在高温段工作,器件材料需要通过高温探针台进行性能测试,金属电学探针在高温下的物理性能变化对测试结果可能会有显著影响。因此,掌握金属探针的高温物理特性很重要。本文基于通过有限元法计算了金属探针的杨氏模量在高温情况下的变化特性。研究结果表明金属针尖的温度随时间变化呈非线性上升关系,并逐渐趋于饱和。针尖的杨氏模量随着温度的升高而近似线性下降。同时发现,杨氏模量的下降与针尖的位置有关系。杨氏模量下降代表金属探针越易发生形变。因此,在高温测试前期的准备中,需要对探针进行预加热来减少探针的伸长的影响,最终需寻找一个探针位置的平衡点以降低探针形变对实验结果的影响。
In extreme conditions such as aerospace, some electrical devices need to work in the high-temperature range, and the material of the device needs to be tested through a high-temperature probe platform. The physical performance changes of metal electrical probes at high temperatures may have a significant impact on the test results. Therefore, it is important to master the high-temperature physical properties of metal probes. This article is based on the calculation of the variation characteristics of Young’s modulus of metal probes under high-temperature conditions using the finite element method. The research results indicate that the temperature of the metal needle tip exhibits a nonlinear upward relationship with time and gradually approaches saturation. The Young’s modulus of the needle tip decreases approximately linearly with increasing temperature. It was also found that the decrease in Young’s modulus is related to the position of the needle tip. The decrease in Young’s modulus indicates that the metal probe is more prone to deformation. Therefore, in the preparation for high-temperature testing, it is necessary to preheat the probe to reduce the impact of probe elongation, and ultimately find a balance point for the probe position to reduce the impact of probe deformation on the experimental results.

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