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聚焦于干涉量这一核心工艺参数,系统探究了其对CFRP单搭螺栓连接静力与疲劳性能的双重影响规律。通过开展涵盖4种干涉水平的准静态拉伸与拉-拉疲劳试验,量化分析了干涉量对连接结构屈服载荷、失效模式及疲劳寿命的调控作用。试验结果表明,结构的静强度随干涉量增加呈单调递增趋势,疲劳寿命则呈现先增后降的非线性响应规律,并在0.6%的干涉量下达到峰值。此外,构建了考虑干涉装配效应的三维渐进损伤有限元模型,该模型耦合了三维Hashin失效准则、剩余刚度/强度退化模型及等寿命方程。仿真结果与试验数据高度吻合,精确预测了全工况下的疲劳寿命,最大误差小于3.6%,成功复现了孔周基体损伤等关键失效形貌。
Abstract：Focusing on interference amount as the core process parameter, its dual influence on both the static and fatigue performance of CFRP single-lap bolted joints was systematically explored. Through conducting quasi-static tension and tension-tension fatigue tests across four interference levels, the regulatory effects of interference amount on the yield load, failure mode and fatigue life of the joint structures were quantitatively analyzed. Test results indicate that the static strength increases monotonically with the increase of interference amount,while the fatigue life exhibits nonlinear response laws of increasing first and then decreasing, and reaches peak value with interference amount of 0. 6%. Furthermore, a three-dimensional progressive damage finite element model incorporating the interference assembly effect was developed. This model couples 3D Hashin failure criterion with residual stiffness/strength degradation models and constant life equation. The simulation results align well with test data, the fatigue life across all working conditions is accurately predicted, with the maximum error below 3. 6%, and the key failure morphologies such as matrix damage around the hole are successfully replicated.
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基本信息:
中图分类号:V215;TH131.3
引用信息:
[1]张金煜,王盟圣,杨永泰.干涉量对CFRP螺栓连接力学性能的影响分析与数值仿真[J].塑性工程学报().
基金信息:
福建省科技计划-STS院省合作项目(2024T3052)
2025-12-31
2025-12-31
2025-12-31