CFRP布/树脂胶复合条带的抗拉力学性能  

Tensile Properties of CFRP/Epoxy Gel Composite Strip

作　　者：郑康 陈力[1] 方秦[1] 高飞[1] ZHENG Kang;CHEN Li;FANG Qin;GAO Fei(State Key Laboratory of Disaster Prevention ~ Mitigation of Explosion ＆ Impact, PLA University of Science and Technology ,Nanjing 210007 ,China)

机构地区：[1]解放军理工大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007

出　　处：《高压物理学报》2017年第6期794-802,共9页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金优秀青年基金(51622812);国家重点基础研究发展计划课题(2015CB058003)

摘　　要：碳纤维聚合物(CFRP)编织布和环氧树脂胶已被广泛应用于工程结构的外贴抗爆加固。为了了解CFRP布/树脂胶复合成型材料的基本力学性能,系统开展了标准复合条带试件的准静态拉伸力学试验,得到了拉伸应力-应变全过程曲线,并基于试验结果标定了有限元模型的关键材料参数。研究结果表明:CFRP布/树脂胶复合成型材料呈现明显的弹脆性特点,抗拉强度能够达到4 100MPa,外贴树脂胶能够显著降低CFRP布力学性能指标的离散性,保证CFRP布材料特性的充分发挥;初始树脂粘贴缺陷对条带试件的破坏形态和抗拉性能有显著影响,外贴树脂胶的施工均匀度对加固工程结构的抗爆性能至关重要。Carbon fiber reinforced polymer （CFRP） laminates and epoxy gels have been extensively applied to externally strengthen engineering structures to resist blast loading. In order to understand the mechanical properties of CFRP/epoxy gel composites,we carried out a series of quasi-static tensile tests and obtained the entire tensile stress-strain curve. Based on the test results, we calibrated the material parameters of the finite element model developed in LS-DYNA software. It is found that CFRP/epoxy gel composites exhibit an obvious elastic-brittle characteristic, and the mean value of the tensile strength obtained in the test is up to 4 100 MPa. Being externally attached with resin gel, the disadvantage of discrete characteristics of CFRP laminates was significantly improved, which makes the externally bonded CFRP fully effective. The initial defects of the pasted epoxy gels significantly affect the failure modes and tensile properties of the tested specimen, and the uniformity of the sprayed layer of epoxy gels is of great importance to improving the blast resistance of the retrofitted engineering structures.

关 键 词：碳纤维聚合物 树脂胶 应力-应变全曲线 拉伸试验 

分 类 号：O347[理学—固体力学] TB332[理学—力学]