Abstract A comprehensive model for simulating a constant indentation strain rate test with continuous stiffness measurement (CSM) has been developed in a previous work [ 20 ]. A procedure for correcting errors associated with plasticity during CSM based testing is also developed. Furthermore, a new method that uses a fixed ratio of the amplitude of the sinusoidally varying portion of the instantaneous load to the load's mean value (AC to DC) during CSM testing is proposed that can reduce the plasticity error and improve the signal-to-noise ratio (SNR) in stiffness. In this work, experimental results are presented to assess the accuracy of the simulation results in terms of the displacement waveforms in response to the imposed load oscillations, the functional dependence of the plasticity error and the SNR. A comparison of the experimental results between the new and the traditional CSM methods is also presented and the advantages of the new method are demonstrated. Furthermore, recommendations for performing indentation testing using CSM with improved precision and accuracy are provided.

中文翻译：

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通过连续刚度测量减轻纳​​米压痕过程中塑性误差的方法的实验评估

摘要 在先前的工作中，已经开发了一种用于模拟具有连续刚度测量 (CSM) 的恒定压痕应变率测试的综合模型 [20]。还开发了在基于 CSM 的测试过程中纠正与塑性相关的错误的程序。此外，提出了一种新方法，该方法在 CSM 测试期间使用瞬时负载的正弦变化部分的幅度与负载平均值（AC 到 DC）的固定比率，该方法可以减少可塑性误差并提高信号对 -刚度中的噪声比 (SNR)。在这项工作中，提出了实验结果，以评估模拟结果的准确性，即响应于施加的载荷振荡的位移波形、塑性误差和 SNR 的函数依赖性。还介绍了新方法和传统 CSM 方法之间的实验结果的比较，并证明了新方法的优点。此外，还提供了使用 CSM 进行压痕测试以提高精度和准确度的建议。