Deformation and load transfer analysis of staggered composite-steel lap joints subjected to progressive damage

2020 ◽  
Vol 215 ◽  
pp. 110690 ◽  
Author(s):  
Alaa El-Din A. El-Sisi ◽  
Hesham M. El-Emam ◽  
Hani A. Salim ◽  
Hossam El-Din M. Sallam
Keyword(s):  
Load Transfer ◽  
Lap Joints ◽  
Progressive Damage ◽  
Load Transfer Analysis ◽  
Composite Steel

Effect of Autoclave Cure Time and Surface Preparation on Film Adhesive Bond in Lightweight Material Joints

2018 ◽  
Author(s):  
Isotta Morfini ◽  
Luca Goglio ◽  
Giovanni Belingardi ◽  
Sayed A. Nassar
Keyword(s):  
Failure Mode ◽  
Load Transfer ◽  
Mechanical Performance ◽  
Surface Preparation ◽  
Adhesive Bond ◽  
Lap Joints ◽  
Mode Analysis ◽  
Bonding Parameters ◽  
Film Adhesive ◽  
Cure Time

This study investigates the effect of cure time and surface roughness on mechanical performance of single lap joints (SLJ). Test joints are made of aluminum/aluminum or aluminum/magnesium adherends that are autoclave-bonded using a commercially available film adhesive. Joint mechanical performance is assessed in terms of the static load transfer capacity (LTC), fatigue life and failure mode. Except for the cure time, all the rates of the other autoclave-bonding parameters are kept constant; namely, the level of cure temperature and pressure, as well as the rates of autoclave heating, cooling, pressurization and depressurization. Test data, failure mode analysis, discussion, observations and conclusions are provided.

Winkler load-transfer analysis for pipelines subjected to surface load

2019 ◽  
Vol 111 ◽  
pp. 147-156
Author(s):  
Chenrong Zhang ◽  
Jinru Zhu ◽  
Maosong Huang ◽  
Jian Yu
Keyword(s):  
Load Transfer ◽  
Surface Load ◽  
Load Transfer Analysis

Effect of preload and shim types on the mechanical properties of composite-aluminium bolted joints

2021 ◽  
pp. 095440622110071
Author(s):  
Xuande Yue ◽  
Luling An ◽  
Zengtao Chen ◽  
Yuebo Cai ◽  
Chufan Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Laminates ◽  
Damage Model ◽  
Peak Load ◽  
Lap Joints ◽  
Surface Strain ◽  
Displacement Curve ◽  
Progressive Damage ◽  
Single Lap Joints ◽  
Tensile Stiffness

The influence of both preload and the presence of shim types on the mechanical properties of composite-aluminium single-bolt, single-lap joints were studied in this paper. The load-displacement curve and surface strain field of joints in different shim types and preloads were obtained through tensile experiments. A progressive damage model was established using the UMAT subroutine in ABAQUS. A hybrid failure criterion and a linear continuous degradation model were used to describe the progressive damage of composite laminates. The results show that for joints with no shim and for those with various types of shims, the tensile stiffness, peak load and initial damage load could be reduced when the preload is insufficient or too large. Compared with joints with no shims or with peelable fibreglass shims, joints with liquid shims required a larger preload to achieve the best mechanical properties. As the proportion of peelable fibreglass shim increased, the tensile stiffness and peak load continued to increase in joints with a mixed shim of liquid and peelable fiberglass shim. Shims can serve as tension bearings, but have little effect on the initiation and development of bearing failure.

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