工程水泥基复合材料动态力学性能及抗爆抗冲击能力研究进展

工程水泥基复合材料(ECC)是一种基于微观力学设计的新型纤维增强水泥基材料,它通过连续稳态开裂过程表现出超高延性和韧性,从而克服了普通水泥基材料抗拉能力弱、易开裂的缺点。本文综述了ECC设计机理、动态力学性能及其在抗爆抗冲击方面的研究现状,分析了材料组分设计、高应变率和高温环境对ECC性能的影响,对ECC材料在抗爆抗冲击领域的进一步研究和发展提出了建议。

Research Progress on Dynamic Mechanical Properties and Anti-Explosion and Impact Resistance Performance of Engineered Cementitious Composite

Common cement-based materials have weak tensile strength and easy to crack, however, these shortcomings have been overcome by a new type of fiber reinforced cement-based material—engineered cementitious composite (ECC). High ductility, high toughness and high energy dissipation capacity are the distinctive characteristics of ECC, which are attributed to the steady-state cracking process based on the micromechanical design. After the brief introduction of the development background and design mechanism of ECC, this paper reviewed the researches on dynamic mechanical properties and explosion/impact resistance of ECC. Meanwhile, the influences of high strain rate and high temperature on the performance of ECC were analyzed, and the problems that need to be solved in the application of ECC in protection engineering were also pointed out. Finally, suggestions for future researches and developments of ECC were put forward.