Effect of tightening torque on the mechanical performance and damage form of hybrid bonded/bolted joints

SHEN Jinyi; HU Weixin; ZHANG Tianyu; HU Junshan; LIAO Wenhe; TIAN Wei; SHEN Ye

doi:10.16579/j.issn.1001.9669.2025.07.003

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Effect of tightening torque on the mechanical performance and damage form of hybrid bonded/bolted joints

·Fatigue·Damage·Fracture·Failure Analysis· | 更新时间：2025-07-10

- Effect of tightening torque on the mechanical performance and damage form of hybrid bonded/bolted joints
- Journal of Mechanical Strength Vol. 47, Issue 7, Pages: 24-32(2025)
- 作者机构：
  
  1.南京航空航天大学机电学院，南京 210016
  2.中航西安飞机工业集团股份有限公司，西安 710089
  3.南京理工大学机械工程学院，南京 210094
  4.上海航天电子技术研究所，上海 201109
- 作者简介：
  
  HU Junshan, E-mail: hujunshan@nuaa.edu.cn
- 基金信息：
  
  Anhui Province Key Research and Development Program(202203a05020039);China Postdoctoral Science Foundation(2022M720939);Natural Science Fund for Jiangsu Province(BK20231444);National Natural Science Foundation of China(52005259)
- DOI：10.16579/j.issn.1001.9669.2025.07.003
  CLC： TB332
- Received：24 October 2023，
  
  Revised：09 January 2024，
  
  Published：15 July 2025
- 稿件说明：
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沈金屹，胡卫鑫，张天宇，等. 拧紧力矩对胶螺混合连接力学性能与损伤形式的影响［J］.机械强度，2025，47（7）：24-32.

SHEN Jinyi，HU Weixin，ZHANG Tianyu，et al. Effect of tightening torque on the mechanical performance and damage form of hybrid bonded/bolted joints［J］. Journal of Mechanical Strength，2025，47（7）：24-32.
沈金屹，胡卫鑫，张天宇，等. 拧紧力矩对胶螺混合连接力学性能与损伤形式的影响［J］.机械强度，2025，47（7）：24-32. DOI： 10.16579/j.issn.1001.9669.2025.07.003.

SHEN Jinyi，HU Weixin，ZHANG Tianyu，et al. Effect of tightening torque on the mechanical performance and damage form of hybrid bonded/bolted joints［J］. Journal of Mechanical Strength，2025，47（7）：24-32. DOI： 10.16579/j.issn.1001.9669.2025.07.003.

摘要

为研究编织型复合材料胶螺混合连接接头的力学性能，构建基于三维渐进损伤模型和内聚力模型的胶螺混合连接接头力学失效模型，模拟连接接头的力学行为与损伤演化。基于Abaqus有限元软件，建立编织型复合材料胶螺混合连接有限元仿真模型，通过三维Linde准则判断复合材料的损伤萌生与扩展，采用内聚力模型模拟胶层的损伤失效过程，在试验验证模型准确性的基础上，分析不同拧紧力矩下连接结构强度和损伤失效过程。试验结果与仿真模拟结果表明，随着拧紧力矩的增加，胶层损伤扩展得到有效抑制，而胶螺混合连接结构的胶层剪切强度先增加后减小。这是因为增大拧紧力矩可以减小连接结构中胶层的剥离应力，但过大的拧紧力矩会增大胶层孔周应力，导致胶层剪切强度减小，降低了连接结构的强度。数值模拟的载荷-位移曲线与试验结果吻合，所预测的胶层断裂载荷与试验结果相当；同时层合板上的纤维损伤、基体损伤以及分层损伤在数值模型中也能很好地体现，与连接件试验后的损伤形式相近，验证了损伤预测模型的有效性。

Abstract

To investigate the mechanical properties of woven composite hybrid bonded/bolted joints

a mechanical failure model for hybrid bonded/bolted joints based on 3D progressive damage model and cohesive force model was developed to simulate the mechanical behavior and damage evolution of the joints.Based on the Abaqus finite element software

a finite element simulation model for hybrid bonded/bolted joints woven composites was established. The damage initiation and propagation of the composite material were judged using the three-dimensional Linde criterion. The cohesive force model was used to simulate the damage failure process of the adhesive layer. On the basis of test verification of the model accuracy

the strength and damage failure process of the joints were analyzed under different tightening torques. The test and simulation results indicate that as the tightening torque increases

the extension of adhesive layer damage can be effectively suppressed. However

the shear strength of the adhesive layer in the hybrid bonded/bolted joints firstly increases and then decreases

because increasing the tightening torque can reduce the peeling stress of the adhesive layer in the joints. However

the excessive tightening torque will strengthen the stress around the adhesive layer hole

leading to a decrease in the shear srength of the adhesive layer and a decrease in the strength of the connection structure. The load-displacement curve of the numerical simulation is consistent with the test results

and the predicted adhesive layer fracture load is equivalent to the test results. At the same time

the fiber damage

matrix damage

and delamination damage on the laminated plate can also be well reflected in the numerical model

which is similar to the damage form after the connection test

verifying the effectiveness of the damage prediction model.

关键词

Keywords

references

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