Research Initiation: Evaluation of Processing Techniques for Manufacturing High-Performance Cement Based Composites

一个关于加工和表征的研究项目， 水泥基复合材料含有高体积分数的 纤维是要做的。 研究集中在 制造技术和本构关系 纤维、基体、界面 以及所采用的加工技术。 机械 这些复合材料的性能作为纤维的函数 长度、界面性质、基质性质，以及 将测量处理技术。 应答 完整的应力-应变曲线，实验R曲线， 峰后应力-裂纹宽度关系为 使用数字控制闭环测试测量。 的 在使用图像分析的定量光学显微术中， 将开发技术来测量应力引起的 微裂纹将制定一种R曲线方法， 纤维的拔出响应。 这种方法将是 在复合裂缝模型中实现，以预测 最佳的材料性能。

A research project on the processing and characterization of cement-based composites containing high volume fraction of fibers is to be performed. The study concentrates on the manufacturing techniques and the constitutive laws based on the relationship among the fiber, matrix, interface, and the processing technique employed. The mechanical properties of these composites as a function of fiber lengths, interfacial properties, matrix properties, and the processing technique will be measured. Responses such as complete stress-strain curves, experimental R-curve, and post-peak stress-crack width relationship will be measured using digitally controlled closed loop tests. The in quantitative optical microscopy using image analysis techniques will be developed to measure stress induced microcracking. An R-Curve approach will be developed for the pull-out response of fibers. This approach will be implemented in a composite fracture model to predict the optimum material properties.