ISO 12110-2:2013介绍了变幅疲劳试验中使用的循环计数技术和数据简化方法。对于每个测试或测试系列，循环计数是强制性的，而数据简化方法是可选的。 ISO 12110-2:2013支持ISO 12110-1，其中包含了一般原则，并描述了变幅疲劳试验的常见要求。ISO 12110-2:2013，术语“载荷”指的是力、应力或应变，因为此处给出的方法适用于所有情况。 以下问题不在本文件的范围内，因此不涉及:隔离过载或欠载的恒幅试验；大型组件或结构；与温度/时间相互作用相关的环境效应，如腐蚀、蠕变等，导致频率和波形效应；多轴加载。

ISO 12110-2:2013 presents cycle counting techniques and data reduction methods which are used in variable amplitude fatigue testing. For each test or test series, cycle counting is mandatory whereas data reduction methods are optional. ISO 12110-2:2013 supports ISO 12110-1 which contains the general principles and describes the common requirements about variable amplitude fatigue testing. ISO 12110-2:2013, the term "loading" refers either to force, stress, or strain since the methods presented here are valid for all. The following issues are not within the scope of this document and therefore are not addressed: constant amplitude tests with isolated overloads or underloads; large components or structures; environmental effects like corrosion, creep, etc. linked to temperature/time interactions leading to frequency and waveform effects; multiaxial loading.