小弟需执行一拉伸实验，是有关於薄的薄膜拉伸， 参考他人测试的规范应该为ASTM D882， 问题是小弟经验不足研读过後小弟理解为其决定拉伸速率的规则有其特殊性， 想请问是否有人是否有针对此类的测试有深入探讨，可让我请益， 问题主要是为何此类的测试拉伸速率有特别的决定方式与 如何决定最後产品的拉伸速率? 这些拉伸速率的不同对测试结果与分析有何影响? 相关原文如下: 9. Speed of Testing 9.1 The speed of testing is the rate of separation of the two members (or grips) of the testing machine when running idle (under no load). This rate of separation shall be maintained within 5 % of the no-load value when running under fullcapacity load. 9.2 The speed of testing shall be calculated from the required initial strain rate as specified in Table 1. The rate of grip separation shall be determined for the purpose of these test methods from the initial strain rate as follows: The speed of testing shall be calculated from the required initial strain rate as specified in Table 1. The rate of grip separation shall be determined for the purpose of these test methods from the initial strain rate as follows: A=BC A = rate of grip separation, mm (or in.)/min, B = initial distance between grips, mm (or in.), and C = initial strain rate, mm/mm·min (or in./in.·min). In cases where conflicting material classification, as determined by percent elongation at break values, results in a choice of strain rates, the lower rate shall be used If modulus values are being determined, separate specimens shall be used whenever strain rates and specimen dimensions are not the same as those employed in the test for other tensile properties 希望有高手可以让我请益，甚至若嫌打字太麻烦我拨电话请较亦可，谢谢 --

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