ISO 4965-1:2012 金属材料 单轴向疲劳测试的动态力校准 第1部分：测试系统
标准编号：ISO 4965-1:2012
中文名称：金属材料 单轴向疲劳测试的动态力校准 第1部分：测试系统
英文名称：Metallic materials — Dynamic force calibration for uniaxial fatigue testing — Part 1: Testing systems
发布日期：2012-07
标准范围
ISO 4965-1:20 12描述了两种方法，用于确定在单轴、正弦、恒定振幅测试中施加到测试件的动态力范围与测试系统指示的力范围之间的关系。这些方法适用于远离系统谐振频率运行的动态测试系统，并且与动态力测量误差未知或预期超过所施加力范围1%的测试系统相关。动态力测量误差通过将动态测试系统指示的峰值力与应变动态校准装置（DCD）测量的峰值力进行比较来确定。该DCD之前已根据测试系统指示器进行了静态校准。对于方法A（重复试验-件法），动态校准仅适用于该类型试件的经验证频率范围。频率相关校正因子适用于校正高达动态力范围10%的动态力测量误差。通过使用这样的校正因子，实际试样动态力测量误差将减小到动态力范围的1%以下。对于方法B（柔度包络法），动态校准适用于柔度介于两个DCD之间的试件验证的测试频率范围。不适用校正系数，因为方法B不允许动态力测量误差超过动态力范围的1%。
ISO 4965-1:2012 describes two methods for determining the relationship between the dynamic force range applied to a test-piece in a uniaxial, sinusoidal, constant amplitude test and the force range indicated by the testing system.These methods are applicable to dynamic testing systems operating away from system resonant frequencies and are relevant to testing systems where the dynamic force measurement errors are either unknown or where they are expected to exceed 1 % of the applied force range.The dynamic force measurement errors are determined by comparison of the peak forces indicated by the dynamic testing system with those measured by the strain gauged dynamic calibration device (DCD). This DCD has previously undergone static calibration against the testing system indicator.For Method A (Replica test-piece method), the dynamic calibration is applicable over the validated range of frequencies for that type of test-piece only. A frequency-dependent correction factor is applicable for the correction of dynamic force measurement errors of up to 10 % of dynamic force range. By using such a correction factor, the actual test specimen dynamic force measurement error will be reduced to less than 1 % of the dynamic force range.For Method B (Compliance envelope method), the dynamic calibration is applicable over the range of test frequencies validated for test-pieces whose compliance lies between those of the two DCDs. No correction factor is applicable, as Method B does not permit dynamic force measurement errors above 1 % of the dynamic force range.
标准预览图
