Dynamic strength of single lap joints with similar and dissimilar adherends

Sankar, H. Ravi; Adamvalli, M.; Kulkarni, Purushottam; Parameswaran, Venkitanarayanan

doi:10.1016/j.ijadhadh.2014.07.014

Cited by 37 publications

(11 citation statements)

References 19 publications

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“…The mechanical properties of polymer adhesives were sensitive to the loading rates. The mechanical properties of the neat adhesive 2–12 and nanocomposite adhesive 13,14 at high loading rates were higher compared to that of adhesive at static load. In recent years, the reinforcement of nanoparticles in polymer adhesive became a process to enhance the mechanical properties 15–23 .…”

Section: Introductionmentioning

confidence: 86%

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles

Gupta

2020

Polymer Composites

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The failure load of single‐lap steel joints (subjected to compressive force) with epoxy/nano‐Al2O3 adhesives containing 0.5, 1.0, 1.5, and 2.0 wt% of sphere and rod nano‐Al2O3 was analyzed at quasi‐static loading. At optimum wt% (1.5 wt%) of nano‐Al2O3, the failure load of epoxy/nano‐Al2O3 adhesive was determined at high strain rates using Kolsky bar. Critical stress intensity factor of the adhesive layer at the corner of single‐lap joints was calculated from the experimentally obtained failure load. A substantial improvement in the failure load and critical stress intensity factor of epoxy/nano‐Al2O3 adhesives was achieved compared to the base adhesive at quasi‐static and high shear strain rates. Whereas, the failure load of epoxy/nano‐Al2O3 adhesives containing 1.5 wt% of sphere and rod nano‐Al2O3 at high shear strain rates were 3 to 5 times more than the static failure load of adhesives. The reinforcement of sphere nano‐Al2O3 in epoxy had better performance on failure load and critical stress intensity factor of joints compared to rod nano‐Al2O3 under the compressive mode of loading.

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Section: Introductionmentioning

confidence: 86%

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles

Gupta

2020

Polymer Composites

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“…Further Sankar et al. 15 investigated the strength of adhesive lap joint with similar and dissimilar adherents. Kadioglu and Adams 16 had studied the behavior of flexible adhesive under impact loading of the lap joint.…”

Section: Introductionmentioning

confidence: 99%

“…Gonc¸alves et al 14 had investigated the advantages of weld bonding against alternative spot welding and adhesive bonding technology. Further Sankar et al 15 investigated the strength of adhesive lap joint with similar and dissimilar adherents. Kadioglu and Adams 16 had studied the behavior of flexible adhesive under impact loading of the lap joint.…”

Section: Introductionmentioning

confidence: 99%

Weld bonding process analysis for tensile shear strength and peel strength of weld bonded joints of dissimilar steel sheets

Boriwal

Sarviya

Mahapatra

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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Evaluating the strength performance of resistance spot welded joints in dissimilar material is critical for their continued integration into the automobile and aerospace industries. The effect of joint strength is an important consideration in the design of welded structures. The aim of this paper is to evaluate the effect of the welding process parameters (welding current, weld time, and electrode pressure) on the mechanical performance of dissimilar weld bonds between austenitic stainless steel 304L and low carbon steel sheets. Mechanical properties of weld bonds are described in terms of bond strength, failure mode, and hardness of the joint. Weld bonding experiments were planned on the basis of full factorial design matrix. Weld bonded joint strength tests showed that the maximum tensile shear strength and peel strength were achieved at 6.4 kA, eight-cycle weld time with 3 kg/cm2 electrode pressure. The hardness value across the weld bonded fusion zone was not affected much with respect to varying the welding current. Pullout failure and tearing failure modes were observed during the tensile shear strength test of weld bonded joints. Application of adhesive layer at faying surfaces resulted not only in strengthening but also distributing the stress in weld bonded joints.

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“…Adhesive bonded joints generally show significant rate dependence, which has to be accounted for in structures where crash and impact may take place [10][11][12][13]. Similarly to the mechanical joints, also adhesive joints have to be considered as structures in testing.…”

Section: Introductionmentioning

confidence: 99%

High rate loading of hybrid joints in a Split Hopkinson Tension Bar

2018

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Bonded joints are nowadays seen as one of the preferred joining methods in aerospace applications. However, the difficulty in certifying bond strength and the relatively low energy absorption capability of the joint are barriers to widespread adoption. The use of a hybrid joint, that is, the combination of a mechanical and a bonded joint, allows for a fail-safe design and offers improved performance of the joint. The quasi-static properties of hybrid joints have been investigated by a number of researchers. In contrast, the high rate loading regime has been only sparsely investigated. In this work, hybrid joints are tested in quasi-static and high rate loading in order to analyze their loading rate dependence. The hybrid joint studied is a composite-aluminum double lap shear joint with Sikaforce 7752 adhesive and Hi-Lite-315 countersunk titanium bolts. In order to quantitatively analyze the high rate behavior of the hybrid joints and their respective sub-components, additional tests are carried out on simply bonded and simply bolted specimens. The high rate characterization was performed with a Split Hopkinson Tension Bar. The main challenges for these tests are the relatively large specimen size and complex specimen geometry needed to properly characterize the joint behavior, which both are in contradiction with the assumptions of the classical Split Hopkinson Bar-analysis. In this paper we describe an approach to solve these challenges based on an elastic wave analysis of the system.

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Dynamic strength of single lap joints with similar and dissimilar adherends

Cited by 37 publications

References 19 publications

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles

Weld bonding process analysis for tensile shear strength and peel strength of weld bonded joints of dissimilar steel sheets

High rate loading of hybrid joints in a Split Hopkinson Tension Bar

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Dynamic strength of single lap joints with similar and dissimilar adherends

Cited by 37 publications

References 19 publications

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al2O3 sphere and rod particles

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al2O3 sphere and rod particles

Weld bonding process analysis for tensile shear strength and peel strength of weld bonded joints of dissimilar steel sheets

High rate loading of hybrid joints in a Split Hopkinson Tension Bar

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Product

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Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles

Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al₂O₃ sphere and rod particles