在蠕变试验中使用了各种方法测量应变。不论用什么方法,不论直接测量或间接测量,它都是假定所测量的应变是在试样标距内产生的伸长。最简单的方法是,在高温和低温下测量总负荷系。如果由于适当的试样与负荷系的设计,在试样标距以外产生的变形很小,这种方法倒是最方便和最合乎需要 Various methods are used in creep tests to measure strain. Regardless of the method used, whether direct or indirect, it assumes that the strain measured is the elongation produced within the gauge length of the specimen. The easiest way is to measure the total load at high and low temperatures. This method is the most convenient and most suitable if the deformation outside the sample gauge is small due to the proper design of the sample and load system