Fatigue performance of bonded crack retarders in the presence of cold worked holes and interference-fit fasteners

A new model for stress analysis in pin–Plate interference fit joints under tension loading

“…10–21 Among them, interference fit is one of the most effective approaches in fatigue life enhancement and has been widely used in aircraft assembly. 8–11,13,19–20…”

“…[10][11][12] Therefore, to compensate the drawback in these joints, various methods and techniques including cold expansion, interference fitting, and bolted clamping have been proposed to enhance the fatigue life of such structures. [10][11][12][13][14][15][16][17][18][19][20][21] Among them, interference fit is one of the most effective approaches in fatigue life enhancement and has been widely used in aircraft assembly. [8][9][10][11]13,[19][20] Due to the extensive applications of interference fit, numerous investigations reported in literatures have been conducted to prove that this method contributes to beneficial effects in various kinds of structures, such as aluminum alloy single-holed joints, single shear lap joints, and double shear lap joints; 2,[8][9][10][11]13,19 moreover, even better static, dynamic, and fatigue response in composite and titanium alloy joints can be seen through induced by this technology.…”

“…[10][11][12][13][14][15][16][17][18][19][20][21] Among them, interference fit is one of the most effective approaches in fatigue life enhancement and has been widely used in aircraft assembly. [8][9][10][11]13,[19][20] Due to the extensive applications of interference fit, numerous investigations reported in literatures have been conducted to prove that this method contributes to beneficial effects in various kinds of structures, such as aluminum alloy single-holed joints, single shear lap joints, and double shear lap joints; 2,[8][9][10][11]13,19 moreover, even better static, dynamic, and fatigue response in composite and titanium alloy joints can be seen through induced by this technology. [22][23][24][25][26][27][28] The normal process of interference fit involves inserting an oversized fastener into a hole causing the hole to stretch radially, during which the residual tensile tangential stress is induced around the hole; thus, the fatigue life of the joints increases under cyclic loads.…”

Postfatigue Life Prediction of Glare Subjected to Low-Velocity Impact

“…These fibers create a load transfer pass over the crack and restrain crack opening. Therefore, less force is transferred around the crack tip in metal layers that this, in turn, reduces the stress concentration factor of the crack tip [9][10][11][12][13][14][15][16][17][18]. Considering the present metaheuristic algorithms, the multilayer perceptron neural network was selected for modeling due to their high performance in educability and the possibility of approximating non-linear results.…”

Energy-Resolved Neutron Imaging for Reconstruction of Strain Introduced by Cold Working

“…In addition, to increase the reliability and lifetime of these joints, not only are these holes treated by a cold expansion procedure, but reinforcement by special laminates is also being investigated at the present time. GLARE (glass-reinforced aluminium laminate) is one of the possible solutions being considered for fatigue resistance in critical areas for aerospace applications [25][26][27]. Such laminates typically consist of several thin layers of metal (typically aluminium) interspersed with bonded layers of glass fibers.…”