Scholarlink

<p>The structural integrity of composite multi-bolt joints is inherently compromised by uneven load and strain distributions, which pose significant challenges for structural design and assembly. This study innovatively investigates a double-lap laminate three-bolt joint to explore the effects of non-uniform preload on the tensile strength and failure mechanisms of composite bolt joints through a synergistic approach of experiments and ABAQUS based numerical simulations. Strain gauges were employed to capture real-time strain evolution during loading. Key findings reveal a nonlinear gradient increase in bypass strain along the loading direction, coupled with a “high–low–high” bolt load distribution pattern. Notably, introducing deliberate preload inconsistencies across bolts is found to: mitigate internal stress concentrations by redistributing loads to underutilized bolts, and delay damage initiation in composite laminates. The findings demonstrate that optimized preload non-uniformity can improve load-sharing efficiency without compromising ultimate strength.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis of bypass strain and bolt load distribution in composite multi-bolt joints under inconsistent preload

  • 期刊论文

  • 发表日期：

    2025年7月8日

查看全文
  • Yang Yang,
  • Luling An,
  • Cong Zhao,
  • Wenguang Liu

摘要

The structural integrity of composite multi-bolt joints is inherently compromised by uneven load and strain distributions, which pose significant challenges for structural design and assembly. This study innovatively investigates a double-lap laminate three-bolt joint to explore the effects of non-uniform preload on the tensile strength and failure mechanisms of composite bolt joints through a synergistic approach of experiments and ABAQUS based numerical simulations. Strain gauges were employed to capture real-time strain evolution during loading. Key findings reveal a nonlinear gradient increase in bypass strain along the loading direction, coupled with a “high–low–high” bolt load distribution pattern. Notably, introducing deliberate preload inconsistencies across bolts is found to: mitigate internal stress concentrations by redistributing loads to underutilized bolts, and delay damage initiation in composite laminates. The findings demonstrate that optimized preload non-uniformity can improve load-sharing efficiency without compromising ultimate strength.