Engineering Research Equipment Grant: 600 K Testing System

将为具有以下特点的标准压缩试验框架购买设备：600K压缩能力、闭环载荷和应变控制能力、液压执行器、数字函数发生器、70GPM液压电源、电子控制器和x-y记录器。该设备的主要目的是研究高强度、高性能的纤维增强水泥基复合材料(混凝土、砂浆、浆体)。高强度意味着延性(或韧性)比未增强的母材大一到两个数量级。本研究的主要目的是了解这些复合材料的纤维增强机理，并建立本构模型来预测它们在单调和循环载荷作用下的应力-应变响应。该实验方案需要使用具有反馈控制能力的大容量(600Kips)压缩试验机。

Equipment will be acquired for a standard compression test frame with the following features: 600 K compression capacity, closed-loop load and strain control capability, hydraulic actuator, digital function generator, 70 gpm hydraulic power supply, and electronic controllers and x-y recorder. The research for which this equipment is primarily intended deals with high strength, high performance fiber-reinforced cementitious composites (concrete, mortar, slurry paste). High strength implies a ductility (or toughness) one to two orders of magnitude larger than that of the unreinforced matrix. The main objective of this research is to understand the fiber reinforcing mechanisms of these composites and develop constitutive models to predict their stress-strain response under monotonic and cyclic loadings. The experimental program necessitates the use of a large capacity (600 kips) compression testing machine with feedback control capablity.