Open AccessEffect of interference-fit percentage and preload on the mechanical behaviour of single-shear lap composite joint
Author(s) -
Peng Zou,
Hui Cheng
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/531/1/012074
Subject(s) - interference fit , preload , finite element method , structural engineering , composite number , bolted joint , torque , joint (building) , materials science , mechanism (biology) , composite material , engineering , physics , medicine , hemodynamics , quantum mechanics , thermodynamics
The mechanical behaviour of composite interference-fit structure is affected by both interference-fit percentage and bolt preload. These two factors combine and interact with each other, leading to a complex joint behaviour. In this paper, the effect of interference-fit percentage and bolt preload on load and damage of single-lap bolted joint is studied from both experiment and finite-element model (FEM). Firstly, an interference-fit preload applying experiment was made. Preloads on both nut and bolt head were measured for different percentages and torques, and the torque coefficient was calibrated. A scanning electron microscope (SEM) analysis on the experimental joint was also conducted to research damages around the hole. Then, the relationship between torque and multi-layer preloads and a composite preload FEM based on progressive damage mechanism were built. The multi-layer preloads were obtained and compared with the experimental measured ones, which verified the reliability of the FEM. In addition, the damage mechanism of different percentages and torques were also analysed and discussed with the simulation results.