Optimisation of the shear stress transfer in structural bonded assemblies using a curved bonded joint geometry

2011 ◽  
Vol 25 (2) ◽  
pp. 442-451 ◽  
Author(s):  
Sylvain Chataigner ◽  
Jean-Francois Caron
Keyword(s):  
Shear Stress ◽  
Stress Transfer ◽  
Joint Geometry ◽  
Bonded Joint

Research of Stress Transfer Area and its Length Prediction of Single-Lap Adhesive Joint

2010 ◽  
Vol 129-131 ◽  
pp. 680-685
Author(s):  
Wei Ping Ouyang ◽  
Jian Ping Lin ◽  
Zhi Guo Lu
Keyword(s):  
Shear Stress ◽  
Adhesive Joint ◽  
Stress Transfer ◽  
Uniaxial Tensile ◽  
Stress And Strain ◽  
Significant Implication ◽  
Transfer Length ◽  
Fem Model ◽  
Strain Fracture ◽  
Stress And Strain Distribution

obtaining the law of stress and strain distribution of loaded adhesive joint has significant implication for joint design and its strength prediction. The dynamic FEM model of uniaxial tensile adhesive joint was established, in which strain fracture criteria is adopted. It can be observed from the FEM results that: lapped area of the joint bears shear stress primarily, the adherend areas located away from the lapped area bear steady tensile stress mainly and the adherend areas adjacent to lapped area endure tensile and shear stress simultaneously. Based on stress distribution characters, the joint was divided into three areas (lapped area, stress transfer area and uniform stress area) and an analytical model predicting the length of stress transfer areas was developed. DIC technology was applied to measure the whole field strain of the joint. It can be seen from the DIC results that the joints area division and the model of predicting the length of stress transfer length are feasible.

On modification of shear stress transfer in bubbly liquids

2003 ◽  
Vol 2003 (0) ◽  
pp. 187
Author(s):  
Yuichi Murai ◽  
Hiroshi Oiwa ◽  
Fujio Yamamoto
Keyword(s):  
Shear Stress ◽  
Stress Transfer ◽  
Bubbly Liquids

Three-dimensional centrifuge and numerical modeling of the interaction between perpendicularly crossing tunnels

2013 ◽  
Vol 50 (9) ◽  
pp. 935-946 ◽  
Author(s):  
Charles W.W. Ng ◽  
Thayanan Boonyarak ◽  
David Mašín
Keyword(s):  
Shear Stress ◽  
Tensile Strain ◽  
Control Volume ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Stress Transfer ◽  
American Concrete Institute ◽  
Overburden Pressure ◽  
Novel Technique ◽  
Centrifuge Tests

Tunnel driving inevitably induces changes in stress and deformation in the ground, which could cause ultimate and serviceability problems to an adjacent tunnel. The effects of induced stress on an existing tunnel and crossing-tunnel interaction are still not fully understood. In this study, a series of three-dimensional centrifuge tests were carried out to investigate the responses of an existing tunnel in sand to the excavation of a new tunnel perpendicularly below it. Three-dimensional tunnel advancement was simulated using a novel technique that considers the effects of both volume and weight losses. This novel technique involves using a “donut” to control volume loss and mimic soil removal in-flight. To improve fundamental understanding of the stress transfer mechanism during the new tunnel advancement, measured results were back-analyzed three-dimensionally using the finite element method. The maximum measured settlement of the existing tunnel induced by the new tunnel constructed underneath was about 0.3% of tunnel diameter, which may be large enough to cause serviceability problems. The observed large settlement of the existing tunnel was caused not only by a sharp reduction in vertical stress at the invert, but also by substantial stress transfer of overburden pressure at the crown. The section of the existing tunnel directly above the new tunnel was compressed vertically because the incremental normal stress on the existing tunnel was larger in the vertical direction than in the horizontal direction. The tensile strain and shear stress induced in the existing tunnel exceeded the cracking tensile strain and allowable shear stress limit given by the American Concrete Institute.

An Analytical Model of Stress-Transfer in the Nano-Composites with Debonding Interface

2010 ◽  
Vol 163-167 ◽  
pp. 4599-4603
Author(s):  
Wen Liang Zhu ◽  
Dong Mei Luo ◽  
Ying Long Zhou ◽  
Wen Xue Wang
Keyword(s):  
Shear Stress ◽  
Analytical Model ◽  
Load Transfer ◽  
Polymer Matrix Composites ◽  
Axial Stress ◽  
Interfacial Shear Stress ◽  
Stress Transfer ◽  
Matrix Composites ◽  
Load Transfer Efficiency ◽  
First Time

An improved shear-lag analytical model has been established to study stress transfer in carbon nanotube (CNT) reinforced polymer matrix composites with and without debonding interface. The Poisson’s effect and radial effect of matrix is considered in the model for the first time, and a simplified 2D representative volume element (RVE) is modeled using a four-phase composite composed of matrix, nanotube, bonded, and debonded interfaces in this analysis, and the axial stress for CNT and matrix and interfacial shear stress along the CNT is predicted. The results show that load transfer efficiency in CNT reinforced composites is affected by the debonding length, and the abrupt change of shear stress is existent at the tip of debonding interface.

scholarly journals Unveiling a new shear stress transfer mechanism in composites with helically wound hierarchical fibres

2021 ◽  
Vol 192 ◽  
pp. 106135
Author(s):  
A. Cutolo ◽  
A.R. Carotenuto ◽  
S. Palumbo ◽  
F. Bosia ◽  
N.M. Pugno ◽  
...  
Keyword(s):  
Shear Stress ◽  
Stress Transfer ◽  
Transfer Mechanism

Mechanical model of shear stress transfer of roughened concrete surface for R/C existing member

2018 ◽  
pp. 973-981 ◽  
Author(s):  
Tsubasa Isozaki ◽  
Ukyo Musya ◽  
Yuya Takase ◽  
Takahide Abe ◽  
Keita Sakamoto ◽  
...  
Keyword(s):  
Shear Stress ◽  
Mechanical Model ◽  
Stress Transfer ◽  
Concrete Surface

A Bonded Joint Analysis for Surface Mount Components

1992 ◽  
Vol 114 (1) ◽  
pp. 1-7 ◽  
Author(s):  
S. E. Yamada
Keyword(s):  
Shear Stress ◽  
Joint Analysis ◽  
Bonded Joints ◽  
Analysis Method ◽  
Hyperbolic Functions ◽  
General Belief ◽  
Surface Mount ◽  
Design Considerations ◽  
Bonded Joint ◽  
Peel Stress

To gain a better understanding of the stress state in surface mount joints and their design considerations, an analysis method of bonded joints is developed and consequently three parameters that govern the stress distribution are identified. The solutions are obtained in terms of trigonometric and hyperbolic functions, and then applied to a simplified surface mount device. Contrary to general belief that the surface mount joints are mainly subjected to shear, it is shown that a peel stress also exists in a joint. Especially in a short joint used to connect stiff members as in direct mounting of chips and chip carriers, the magnitude of the peel stress is far greater than the shear stress.

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