Failure Safety Analysis of Composite Bolt Joint Under Influence of Clamping Force

贾宝惠; 方嘉晨; 武涛; 任鹏

doi:10.13433/j.cnki.1003-8728.20230261

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Failure Safety Analysis of Composite Bolt Joint Under Influence of Clamping Force

更新时间：2026-04-23

- Failure Safety Analysis of Composite Bolt Joint Under Influence of Clamping Force
- Mechanical Science and Technology for Aerospace Engineering Vol. 44, Issue 7, Pages: 1290-1300(2025)
- 作者机构：
  
  1. 中国民航大学机构交通科学与工程学院,天津,300300
  2. 中国民航大学航空工程学院,天津,300300
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20230261
  CLC：
- Published：2025
- 稿件说明：
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贾宝惠, 方嘉晨, 武涛, et al. Failure Safety Analysis of Composite Bolt Joint Under Influence of Clamping Force[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(7): 1290-1300.
DOI：

贾宝惠, 方嘉晨, 武涛, et al. Failure Safety Analysis of Composite Bolt Joint Under Influence of Clamping Force[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(7): 1290-1300. DOI： 10.13433/j.cnki.1003-8728.20230261.

摘要

为了研究预紧力对复合材料连接件拉伸性能的影响，通过试验和仿真分析对碳纤维复合材料连接结构展开失效强度安全性分析。通过复合材料连接件拉伸实验分析研究了预紧力(1~6 kN)对连接件拉伸性能的影响。搭建了参数化随机仿真模型模拟拉伸过程中工艺参数的分散性，并对复合材料连接件拉伸失效进行仿真。对连接件拉伸破坏和极限强度进行统计分析，利用基于威布尔分布的双可靠性指标安全强度评估方法，估计了特征强度、下限强度和不同可靠度置信度等级下的安全设计强度。结果表明：在1~6 kN内随着预紧力的递增，破坏载荷和极限载荷增加，较预紧力为1 kN时分别提高了18.7%和12.9%；比较双可靠性指标方法下的安全承载强度评估结果与安全系数法下的评估结果，不同预紧力下破坏安全承载强度和极限安全承载强度的平均值分别提高7.35%和20.51%，在保证安全的前提下减少了安全冗余设计，提高了材料利用率。

Abstract

To study the effect of the clamping force(1~6 kN) on the properties of composite bolt joint

a series of static tensile tests were conducted. The parameterized stochastic simulation model involving the scatter of the assembly parameters was constructed to simulate the tensile failure of the composite bolt joint. Analyzing the simulation strengths statistically

Weibull function was used to analyze the scatter in the simulation results and estimate the characteristic strengths. Safety design strengths under different reliability levels were estimated by using the dual reliability index method. The results showed that compared to a clamping force of 1 kN

the limit load and ultimate load were

respectively

increased by 18.7% and 12.9% with the increasing of clamping force within the range of 1-6 kN. Comparing the evaluation results under the traditional safety factor method and the dual reliability index method

the average limit and ultimate safety strength increased by 7.35% and 20.51%

respectively

which reduced reliability design redundancy when ensuring safety.

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