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

研究启动：高性能水泥基复合材料制造加工技术评估

• 批准号: 9211063
• 负责人: Barzin Mobasher
• 金额: $ 9.92万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9211063&HistoricalAwards=false
• 关键词: Research; Initiation; Evaluation; Processing; Techniques

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.

开展了一项高纤维体积分数水泥基复合材料的加工与表征研究。这项研究集中在基于纤维、基质、界面和所采用的加工技术之间的关系的制造技术和本构关系。这些复合材料的机械性能将作为纤维长度、界面特性、基质特性和加工技术的函数进行测量。响应，如完整的应力-应变曲线，实验R曲线，以及峰值后的应力-裂缝宽度关系，将使用数字控制的闭环试验进行测量。采用图像分析技术的In Quantity光学显微镜将被用来测量应力诱导的微裂纹。将开发一种R曲线方法来研究纤维的拉拔响应。这种方法将在复合断裂模型中实现，以预测最优的材料性能。