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Behavior of Adhesively Bonded Steel Double Hat-Section Components under Axial Quasi-Static and Impact Loading
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 05, 2016 by SAE International in United States
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An attractive strategy for joining metallic as well as non-metallic substrates through adhesive bonding. This technique of joining also offers the functionality for joining dissimilar materials. However, doubts are often expressed on the ability of such joints to perform on par with other mechanical fastening methodologies such as welding, riveting, etc. In the current study, adhesively-bonded single lap shear (SLS), double lap shear (DLS) and T-peel joints are studied initially under quasi-static loading using substrates made of a grade of mild steel and an epoxy-based adhesive of a renowned make (Huntsman). Additionally, single lap shear joints comprised of a single spot weld are tested under quasi-static loading. The shear strengths of adhesively-bonded SLS joints and spot-welded SLS joints are found to be similar. An important consideration in the deployment of adhesively bonded joints in automotive body structures would be the performance of such joints under impact loading. Due to the brittle nature of adhesively-bonded joints as compared to conventional joining techniques especially welding, the viability of such joints for meeting vehicle crashworthiness requirements has been suspect. In the current study, with the aid of the same steel sheet metal and adhesive used in the joint coupon tests, the performance of adhesively bonded double hat-sections components is compared with that of conventional spot-welded double hat-section components under axial quasi-static loading and impact loading in an instrumented drop-weight test set-up. It is noticed that although nearly complete separation of adhesively bonded flanges resulted in impact tests, these components never-the-less performed admirably well in terms of crash metrics such as mean load and energy-absorption capability. It is also shown that for a combination of discontinuous adhesive bonding and sparse spot-welds with double the pitch of conventional spot-welds, not only the crash performance in terms of the metrics mentioned is assured, but the fear of premature collapse due to complete separation of purely adhesively bonded flanges is avoided.
CitationDeb, A., Chou, C., Srinivas, G., Gowda, S. et al., "Behavior of Adhesively Bonded Steel Double Hat-Section Components under Axial Quasi-Static and Impact Loading," SAE Technical Paper 2016-01-0395, 2016, https://doi.org/10.4271/2016-01-0395.
- Hayashida S , Sugaya T , Kuramoto S , Sato C , Mihara A and Onuma T Impact strength of joints bonded with high-strength pressure-sensitive adhesive International Journal of Adhesion & Adhesives 56 2015 61 72
- Kadioglu F and Adams R D Flexible adhesives for automotive application under impact loading International Journal of Adhesion & Adhesives 56 2015 73 78
- Adachi T , Kataoka T and Higuchi M Predicting impact shear strength of phenolic resin adhesive blended with nitrile rubber International Journal of Adhesion & Adhesives 56 2015 53 60
- Deb A , Malvade I , Biswas P and Schroeder J T An experimental and analytical study of the mechanical behaviour of adhesively bonded joints for variable extension rates and temperatures International Journal of Adhesion and Adhesives 28 2008 1 15
- Peroni L , Avalle M and Belingardi G Comparison of the energy absorption capability of crash boxes assembled by spot-weld and continuous joining techniques International Journal of Impact Engineering 36 2009 498 511
- Huntsman structural adhesives Araldite AV 138M with Hardener HV 998 Two component adhesive Publication No. A 63 f GB
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