S460_Fatigue_Characterization

This dataset contains the raw and analyzed data for the fatigue characterization of the S460 steel. The characterization was achieved in four steps: (a) crack propagation tests were performed in 6 compact tension specimens and the crack tip position was registered by images of the specimens' surface taken periodically; (b) specimen geometry and crack length were used to generate numerical finite element models in Ansys software for each crack measurement instant and the displacements around the crack tip were extracted; (b) Williams' expansion series was used to calculate the KI stress intensity factor from the FE displacements, and (d) dK calculated from KI and crack propagation rate da/dN were used to generate the da/dN x dK curves for the crack propagation phase of Paris' law and to extract coefficients C and m.

本数据集包含S460钢疲劳特性表征的原始数据与分析后数据。本次表征共分为四个步骤：(a) 对6个紧凑拉伸（compact tension, CT）试样开展裂纹扩展试验，通过定期采集试样表面图像记录裂纹尖端位置；(b) 针对每一次裂纹测量时刻，利用试样几何参数与裂纹长度在Ansys软件中构建有限元（finite element, FE）数值模型，并提取裂纹尖端周围的位移场；(b) 采用Williams展开级数，从有限元位移场中计算KI型应力强度因子；(d) 基于由KI计算得到的ΔK以及裂纹扩展速率da/dN，生成Paris定律裂纹扩展阶段的da/dN-ΔK曲线，并提取系数C与m。