论文部分内容阅读
为了使不能使用焊接应变片的大型结构精确地测量其温度应变,日本 KoichiEgawa 研制了一种正反两面都可以粘贴的聚酰亚胺应变片。这种应变片在高温炉内作了要求的视应变测量以后,可以剥下并反过来再在试件上粘贴使用。作者对这种应变片的温度特性——视应变的可重复性,灵敏系数变化、蠕变、漂移和对给定的机械应变输出都进行过试验研究。在250℃时新研制的100片应变片的视应变的可重复性差异在60με以内。经过2—3个热循环以后,进行剥离和反过来再粘贴,应变片的机械应变输出与未使用过的应变片的应变输出几乎是一致的。
In order to make large structures that can not be welded using strain gages accurately measure their temperature strain, Japan KoichiEgawa developed a polyimide strain gauge can be pasted on both sides. After the strain gauge has been subjected to the required visual strain measurements in a high temperature furnace, it can be peeled off and then applied to the test piece. The authors have investigated the temperature characteristics of such strain gages - the strain-rate-dependent reproducibility, sensitivity factor variation, creep, drift, and output for a given mechanical strain. The difference in the visual-strain repeatability of the 100 strain gauges newly developed at 250 ° C is within 60με. After 2-3 thermal cycles, peeled and then glued back, the mechanical strain output of the strain gauge is nearly identical to the strain output of the unused strain gage.