Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/4624
Title: Pre-stressed adhesive strap joints for thick composite sandwich structures
Authors: Canyurt, Olcay Ersel
Zhang, J.
Keywords: Adhesive strap joints
Pre-stressed joints
Thick composite laminates
Adhesive joints
Delamination
Finite element method
Laminated composites
Naval vessels
Steel structures
Structural design
Steel doublers
Composite structures
Abstract: A simple but effective design to improve the strength of thick adhesive composite strap joints is validated with experiment and finite element method. The strap joint under investigation, with a particular application to naval ship structures, consists of two thick woven E-glass/vinyl ester laminates joined together with two steel doublers. Longitudinal tensile loads are applied to the joints, resulting in large concentrated shear and peel stresses near the free edges of bondlines. The new design intends to reduce the adhesive peel stress by application of through-the-thickness compressive pre-stress along the bondline and thus leads to an increase of joint strength. Experiment results show that all the joint failures are delamination of the top layer of the laminated adherends. The test further confirms that joint strength increases significantly by applying the transverse pre-stress. Finite element analysis reveals that the pre-stress can effectively reduce the magnitude even reverse the sign of the peel stress in the adhesive layer and the adherends. Recessing the adhesive leading edge could magnify the pre-stress effect and reduce the adhesive peel stress, but would increase the shear stress. For those composite joints with low transverse interlaminar strength and susceptible to delamination, this simple design/technique can considerably improve their joint strength. © 2005 Elsevier Ltd. All rights reserved.
URI: https://hdl.handle.net/11499/4624
https://doi.org/10.1016/j.ijmecsci.2005.11.004
ISSN: 0020-7403
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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