Effect of clamping force and friction coefficient on stress intensity factor of cracked lapped joints

Sallam, Hossam El-Din M.; El-Sisi, Alaa; Matar, Ehab B.; El-Hussieny, Osama M.

doi:10.1016/j.engfailanal.2011.05.015

Cited by 30 publications

(12 citation statements)

References 18 publications

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“…Many researchers [15][16][17][18][19][20] studied the effect of friction, clamping force, and clearance between the hole and bolt on the stress intensity factor (SIF) for the cracks at the hole-edge. Sallam et al [2] concluded that, clamping force with rough surface has a significant effect on decreasing SIF in cracked lapped joints due to the decrease in the bearing load in addition to the resistance of the contact surface of bolt head or washer to open the surfaces of the crack beneath it. It is found that, the amount of clearance between the hole and the bolt has a significant influence on the SIF for mode I (K I ) [15].…”

Section: Introductionmentioning

confidence: 98%

“…Net-tension (mode I) and shear-out (mode II) modes are catastrophic and result from excessive tensile and shear stresses. Bearing failure mode is a progressive and non-catastrophic compressive failure mode that occurs due to contact between the bolt and the plate, and is a desired failure mode in aerospace applications due to its nature [1][2][3][4][5][6]. Cracks often exist at the joints because of stress concentration, contact interaction between the hole and the bolt, or the manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Crack sensitivity of bolted metallic and polymeric joints

Abd-Elhady

Sallam

2015

Engineering Fracture Mechanics

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Crack sensitivity of bolted metallic and polymeric joints

Abd-Elhady

Sallam

2015

Engineering Fracture Mechanics

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“…The bolted joints investigated either simple bolted or hybrid (bolted-bonded) joints [15][16][17][18]. Results of these investigations were concluded through experimental and FEM numerical techniques [19][20][21][22][23]. These investigations showed that increasing the tightening torque or clamping force on the joint had led to improve the fatigue life [15].…”

Section: Introductionmentioning

confidence: 99%

The failure stages of bolted double-lap metallic joints: experimental study

Abu-Sinna

Abd-Elhady

Atta

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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In this study, the effect of clamping force on the bolted double-lap joints has been investigated experimentally. The mechanical behavior of the present joint has been divided into several stages based on the sequence of failure. The commencement failure occurred in such joint is the sticking failure, i.e., loose of clamping effect. One of the main objectives of present investigation is to study the effect of tightening torque value (T = 0-30 Nm) on the sticking failure load, i.e., initiation of the relative sliding. Three different geometries (e/D = 1, 2, and 3) have been adopted to get different modes of failure, namely bearing, shear, and tensile. A steel sheet AISI 1006 with fixed width 30 mm and thickness 3 mm was used. The present experimental results showed six different stages identifying the mechanical behavior of the doublelap joint namely; sticking failure, bearing failure, shearing failure, ultimate strength, tensile/shear crack initiation (depending on the value of e/D), and lastly final failure. For e/D = 2 and 3, the maximum value of sticking failure load is obtained at T = 25 Nm, while T = 30 Nm for e/D = 1. Furthermore, for all values of e/D, the values of sticking failure load are approximately the same at T = 30 Nm. In the case of small values of tightening torque (T \ 25 Nm), the stiffness of the joint before sticking failure increased by increasing the value of e/D and T. The difference between the stiffness of joints with different values of e/D, e/D = 1-3, decreased by increasing the tightening torque.

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“…As is already known, the composite adhesive/bolted joints are potentially sources of weakness and additional weight in engineering structures and mechanical components, El-Emam et al (2016, 2017; ElSisi et al (2014); Sallam et al (2011). The stress concentrations due to the presence of the fastener hole cause delamination or other types of damage modes and final failure, Sallam et al (2011).. Intra-laminar damage (matrix cracking and tension/compression fiber breakage) and delamination damage (inter-laminar damage) are the main types of damages in composite structures. Progressive damage models (PDMs) focus on failure criterion and the material degradation rule, Hashin (1980.…”

Section: Introductionmentioning

confidence: 99%

Progressive failure prediction of pinned joint in quasi-isotropic laminates used in pipelines

Abd-Elhady

Mubaraki

Sallam

2018

Lat. Am. j. solids struct.

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To simulate the progressive failure of pinned joint in quasi-isotropic [0/45/-45/90]s glass fiber reinforced polymer (GFRP) composite laminates used in pipeline, 3-D finite element model is employed in the present work. Hashin failure criterion as a progressive damage model associated with Virtual-CrackClosing-Technique (VCCT) delamination model has been adopted to predicate the failure due to fiber breakage, matrix cracking and delamination in composite pinned joint. This technique may be an innovation for this paper. W/D has been changed to get different modes of failure, i.e. tension, shear-out and bearing failures, in composite pinned joint,. The failure mode for GFRP composite pinned joint has been predicted finally after prediction the failure at each ply laminate of stacking sequence [0/45/-45/90]s. An experimental work of pinned joint in quasi-isotropic GFRP composite laminates has been conducted to validate the present numerical results. The numerical and experimental results showed an agreement between them. Therefore, the present 3D finite element model can be considered as a good candidate to expect the progressive damage in composite pinned joints. KeywordsComposite pinned joint, quasi-isotropic glass fiber reinforced polymer, 3-D finite element analysis, Hashin failure criteria, Virtual-Crack-Closing-Technique, delamination damage model.

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Effect of clamping force and friction coefficient on stress intensity factor of cracked lapped joints

Cited by 30 publications

References 18 publications

Crack sensitivity of bolted metallic and polymeric joints

Crack sensitivity of bolted metallic and polymeric joints

The failure stages of bolted double-lap metallic joints: experimental study

Progressive failure prediction of pinned joint in quasi-isotropic laminates used in pipelines

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