CAREER: New Methods for Predicting Fatigue Failures in Extrinsically Toughened Materials

摘要：外增韧材料疲劳失效预测新方法[j]。J. KruzicAn方法将用于结构材料的疲劳可靠性预测，这些结构材料利用外部增韧机制来实现抗裂纹扩展。这将通过使用疲劳阈值r曲线（类似于断裂韧性r曲线）将疲劳行为表征为裂纹尺寸的函数来实现，该曲线可用于基于初始最小可检测缺陷尺寸预测疲劳耐力强度。此外，还将开发通过外部增韧过程的定量评价来预测r曲线的方法。最后，本项目将构建为从高中到研究生阶段的学生创建一个协同金字塔式的指导，这将作为吸引高中生进入科学和工程领域的重要招聘工具，同时也作为保持本科生和研究生从事这些领域的重要保留工具。

AbstractCAREER: New methods for predicting fatigue failures in extrinsically toughened materialsJ. J. KruzicAn approach will be developed for making fatigue reliability predictions in structural materials that utilize extrinsic toughening mechanisms to achieve their crack propagation resistance. This will be achieved by characterizing the fatigue behavior as a function of crack size using a fatigue threshold R-curve, analogous to a fracture toughness R-curve, which may then be used for predicting fatigue endurance strengths based on the initial minimum detectable flaw size. Additionally, methods will be developed for predicting such R-curves by quantitative evaluation of the extrinsic toughening processes. Finally, this project will be structured to create a synergistic pyramid of mentoring for the students involved from the high school to graduate level which will act as an important recruiting tool for attracting high school students to science and engineering, while also acting as an important retention tool for keeping the undergraduate and graduate students engaged in those fields.