Peel and shear strength of spot-welded and weld-bonded dissimilar thickness joints

Darwish, S.M.; Al-Samhan, Ali M.

doi:10.1016/j.jmatprotec.2003.11.029

Cited by 46 publications

(32 citation statements)

References 15 publications

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“…Actually, in the work of Chang and Shi [22], a large variation of yield strength was found between the base metal and the weld-nugget, the latter having a yield strength of nearly 400% of the base metal. As a result of these property gradients, the weld-nugget parameters were estimated by fitting between the experimental and FEM P-d curves of the welded joints considering set 2 of welding properties, using a trial and error analysis, such that an empirical law can be established to accurately model the weld-nugget failure, equally allowing extrapolation for the simulation of the weldnugget periphery, as this is the primary region of plastic straining due to the sharp geometry change [23]; sy stresses (Fig. 7a) are relevant only at the weld-nugget, and are caused by the asymmetric transmission of loads.…”

Section: Welded Jointsmentioning

confidence: 99%

“…Compared to spot-welding, weld-bonded joints excel in improved fatigue characteristics, because of the reduction of stress concentrations at the weld-nugget periphery. Evaluated against bonded joints, weld-bonded unions result in a more uniform stress distribution than bonded joints, justifying for both situations the improved characteristics of these hybrid joints [22,23]. Thus, by combination of spot-welding and bonding, their individual disadvantages are eliminated.…”

Section: Introductionmentioning

confidence: 99%

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Optimization study of hybrid spot-welded/bonded single-lap joints

Campilho

Pinto²,

Banea

et al. 2012

International Journal of Adhesion and Adhesives

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Joining of components with structural adhesives is currently one of the most widespread techniques for advanced structures (e.g., aerospace or aeronautical). Adhesive bonding does not involve drilling operations and it distributes the load over a larger area than mechanical joints. However, peak stresses tend to develop near the overlap edges because of differential straining of the adherends and load asymmetry. As a result, premature failures can be expected, especially for brittle adhesives. Moreover, bonded joints are very sensitive to the surface treatment of the material, service temperature, humidity and ageing. To surpass these limitations, the combination of adhesive bonding with spot-welding is a choice to be considered, adding a few advantages like superior static strength and stiffness, higher peeling and fatigue strength and easier fabrication, as fixtures during the adhesive curing are not needed. The experimental and numerical study presented here evaluates hybrid spot-welded/bonded single-lap joints in comparison with the purely spot-welded and bonded equivalents. A parametric study on the overlap length (LO) allowed achieving different strength advantages, up to 58% compared to spot-welded joints and 24% over bonded joints. The Finite Element Method (FEM) and Cohesive Zone Models (CZM) for damage growth were also tested in Abaqus s to evaluate this technique for strength prediction, showing accurate estimations for all kinds of joints.

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Section: Welded Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization study of hybrid spot-welded/bonded single-lap joints

Campilho

Pinto²,

Banea

et al. 2012

International Journal of Adhesion and Adhesives

View full text Add to dashboard Cite

show abstract

“…Darwish and Samhan [11] also state that thinner part of joint have higher stress concentration than in thicker part.…”

Section: Introductionmentioning

confidence: 96%

Tensile Strength of Orbital Welded Mild Steel Tubes with Dissimilar Thickness

Hussein¹,

Ayof²,

Nordin³

2015

IJMMM

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Abstract-Lightweight trend leads to new trend of welding in which optimizing tubes or pipes thicknesses due to its respective workloads. Thinner tube can be used in parts with low working loads and thicker tube for high working loads parts. In order to obtain a good weld, controlling the process parameters such as welding current and welding speed become very crucial as it significantly influences the mechanical properties. Thus, the purpose of this study is to investigate the process-properties relationship of welded mild steel tube of dissimilar thickness by using Metal Inert Gas (MIG) orbital welding. The effects of weld current and jig rotational speed to the tensile properties of welded mild steel tubes were studied. MIG welding was used to weld 26.70 mm diameter of mild steel tubes, which has dissimilar inner diameter of 2.87 mm and 3.90 mm, respectively. The mechanical properties were tested using Universal Tensile Machine (UTM) Instron 8802 model. Design of Experiment (DoE) was used to design the experiment as well as to analyze the data. It was found out that, tensile properties of welded tubes increase with increasing of welding current between 60 and 80 A. On the other hand, increasing in jig rotational speed between 40 and 50 rpm decreases the tensile properties of the welded tubes. Empirical mathematical model was generated and verified.Index Terms-Mild steel, orbital welding, metal inert gas welding, tensile strength and empirical mathematical modeling.

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“…Although there has been a considerable amount of research on the single lap joints, only few studies have been carried out on the effect of the adherend thickness. [1][2][3]. Aydin et al [2] investigated the effect of adherend thickness on the failure of adhesivelybonded single-lap joints.…”

Section: Introductionmentioning

confidence: 99%

“…Aydin et al [2] investigated the effect of adherend thickness on the failure of adhesivelybonded single-lap joints. Darwish and Al-Samhan [3] analyzed the effect of adherend thickness dissimilarity on the peel and shear strength of spot-welded dissimilar thickness joints. The experimental study of the effect of adhesive thickness on the impact toughness of adhesively bonded steel butt-joints was carried out [4] and the effect of the adherend thickness with asymmetric rigidity as well as the nugget location on the stress distribution along the mid-bondline and adherend in weld-bonded aluminium single lap joints was investigated in author's work [5][6].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the adherends with similar thickness on weld-bonded single lap aluminium joint

Wang

You

2017

MATEC Web Conf.

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Abstract. The effect of the adherend with similar thickness varied from 1 mm to 3 mm on the stress distribution in weld-bonded single lap aluminium joint was investigated using elasto-plastic finite element method (FEM). The results from the numerical simulation show that all the values of the peak stresses along the mid-bondline at the points near the both ends of the lap zone as well as the ones in the region of the nugget are increased when the adherend thickness increased. It is suggested that the adherend thickness of 2 mm to 2.5 mm be appropriate to optimize the stress distribution in the weld-bonded single lap aluminium joint.

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Peel and shear strength of spot-welded and weld-bonded dissimilar thickness joints

Cited by 46 publications

References 15 publications

Optimization study of hybrid spot-welded/bonded single-lap joints

Optimization study of hybrid spot-welded/bonded single-lap joints

Tensile Strength of Orbital Welded Mild Steel Tubes with Dissimilar Thickness

Numerical analysis of the adherends with similar thickness on weld-bonded single lap aluminium joint

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