关键词: CFRP, 低温, 孔形, 拉伸, 应变

Abstract: Based on the damage mechanism study of carbon fiber composites, this article established a numerical simulation model and predicted the initial occurrence of damage and ultimate loads. Under dry state at room temperature (23±3) ℃ and dry state at low temperature (-60±3) ℃ , tensile damage experiments were conducted on three carbon fiber composite (CFRP) laminates with different hole shapes and diameters, and their tensile properties and damage mechanisms were analyzed. The result shows that the tensile strength of the laminate with circular holes is the highest in both environments, the tensile strength of the laminate with holes in low temperature environment is stronger than that in room temperature environment. Measurements of strains at different locations in the laminate showed that the maximum strain in the tensile test occurred near the tangent point of the hole tangent line parallel to the load, and the minimum strain occurred near the tangent point of the hole tangent line perpendicular to the load.

Key words: CFRP, low temperature, hole shape, tensile, strain