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为研究新型喷射短切纤维聚合物(FRP)加固材料的受拉力学性能及计算方法,对13组喷射FRP复合材料试件进行了受拉试验研究,分析其破坏模式、应力-应变及抗拉强度、弹性模量、断裂伸长率等主要力学性能指标,并对纤维种类、树脂种类、纤维体积率、纤维长度、复合材料厚度及试件切割方向等影响因素展开了研究。然后在试验基础上,建立了喷射FRP复合材料的抗拉强度理论计算模型,并与试验结果进行了对比。研究表明:喷射FRP材料的受拉性能受上述因素影响较大;所建计算模型可以较好地反映上述因素影响,计算出的各种喷射FRP材料的抗拉强度具有一定的安全裕度,可以用于实际工程的设计。
In order to study the tensile mechanical properties and calculation methods of the new FRP composite, 13 groups of FRP composite specimens were subjected to tensile test and their failure mode, stress-strain and tensile strength Strength, modulus of elasticity and elongation at break. The influencing factors such as fiber type, resin type, fiber volume fraction, fiber length, composite thickness and specimen cutting direction were studied. Then, on the basis of experiments, the theoretical calculation model of tensile strength of FRP composites was established and compared with the experimental results. The results show that the tensile properties of sprayed FRP materials are greatly affected by the above factors. The calculation model can reflect the above factors and the calculated tensile strength of FRP materials has a certain safety margin. For the actual project design.