1、范围1.1粘贴式电阻应变片和引伸计不同之处在于前者是测量名义基长上的平均单位伸长(△L/L)而不是测量指定的测点之间的总伸长。因之,ASTM 方法 E—83,引伸计的校验和分类,对这种应变片并不适用。1.2当这种应变片得到更广泛的应用以后,尤其当承受的温度范围增加后,对其性能有影响的一些附加因素就开始变得重要起来。本方 1, Scope 1.1 The difference between a gaged resistive strain gage and an extensometer is that the former measures the average unit elongation (ΔL / L) on the nominal base length rather than measuring the total elongation between specified test points. Therefore, the ASTM method E-83, extensometer checksum classification, for such strain gages does not apply. 1.2 When such strain gages are more widely used, and especially when the temperature range to which they are subjected increases, some additional factors that affect their performance become more important. This side