【摘要】 为实现视频引伸计在应变硬化指数n值测试过程中的应用,以弥补短行程接触式引伸计测量范围的不足,依据GB/T 5028—2008中有关薄板拉伸应变硬化指数的测试方法,采用INSTRON5985视频引伸计,通过软件Bluehill 3的自动测量及人工测量方式在规定回归区间进行了n5~15值的测定,并采用简化公式进行了验证。结果表明,n5~15值均为0.18,满足能力比对试验结果的测试要求。更多还原

【Abstract】 In order to realize application of the video extensometer in the strain hardening exponent n value testing process, to make up for the measurement range shortage of the short stroke contact extensometer. Based on the related test method of metal sheet tensile strain hardening exponent in GB/T 5028—2008, using INSTRON 5985 video extensometer to measure n5~15value, by means of the software Bluehill 3 automatic measurement and manual measurement methods in the specified regression interval, and the simplified formula was used to verify the methods. The results showed that the n5~15value is 0.18,which meets the requirements of the ability comparison test results.更多还原