Analytical Model for Predicting Stress Distribution and Load Transfer of Tension-Type Anchor Cable with Borehole Deviation

In an implant-supported overdenture, the optimal stress distribution on the implants and least denture displacement is desirable. This study compares the load transfer characteristics to the implant and the movement of overdenture among 3 different types of attachments (ball-ring, bar-clip, and magnetic). Stress on the implant surface was measured using the strain-gauge technique and denture displacement by dial gauge. The ball/O-ring produces the optimal stress on the implant body and promotes denture stability.

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Determination of the Stress Distribution at the Interface Metal-Oxide: Numerical and Theoretical Considerations

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.237-240.145 ◽

2005 ◽

Vol 237-240 ◽

pp. 145-150 ◽

Cited By ~ 1

Author(s):

Sébastien Garruchet ◽

A. Hasnaoui ◽

Olivier Politano ◽

Tony Montesin ◽

J. Marcos Salazar ◽

...

Keyword(s):

Molecular Dynamics ◽

Stress Distribution ◽

Oxide Film ◽

Metal Oxide ◽

Reaction Kinetics ◽

Analytical Model ◽

Equilibrium Thermodynamics ◽

Theoretical Considerations ◽

Molecular Dynamics Results

In this paper we give a brief presentation of the approaches we have recently developed on the oxidation of metals. Firstly, we present an analytical model based on non-equilibrium thermodynamics to describe the reaction kinetics present during the oxidation of a metal. Secondly, we present the molecular dynamics results obtained with a code specially tailored to study the oxidation and growth of an oxide film of aluminium. Our simulations present an excellent agreement with experimental results.

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Study of Pullout Performance of Self-Tapping Screws for Human Bone

ASME 2011 Pressure Vessels and Piping Conference: Volume 2 ◽

10.1115/pvp2011-57594 ◽

2011 ◽

Author(s):

Zhijun Wu ◽

Sayed A. Nassar ◽

Xianjie Yang

Keyword(s):

Finite Element ◽

Stress Distribution ◽

Analytical Model ◽

Material Properties ◽

Pedicle Screws ◽

Pullout Strength ◽

Bone Material ◽

Synthetic Bone ◽

Failure Propagation ◽

Device Applications

The study investigates the pullout strength of self-tapping pedicle screws using analytical, finite element, and experimental methodologies with focus on medical device applications. The stress distribution and failure propagation around implant threads in the synthetic bone during the pullout process, as well as the pullout strength of pedicle screws, are explored. Based on the FEA results, an analytical model for the pullout strength of the pedicle screw is constructed in terms of the synthetic bone material properties, screw size, and implant depth. The characteristics of pullout behavior of self-tapping pedicle screws are discussed. Both the analytical model and finite element results are validated using experimental techniques.

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Mechanical Features of Cable-Girder Anchorage for Long-Span Railway Cable-Stayed Bridge with Steel Box Girders

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.587-589.1391 ◽

2014 ◽

Vol 587-589 ◽

pp. 1391-1394 ◽

Cited By ~ 3

Author(s):

Chao Yi Yao ◽

Qian Hui Pu ◽

Ya Dong Yao

Keyword(s):

Stress Distribution ◽

Rational Design ◽

Load Transfer ◽

Rapid Development ◽

Transfer Mechanism ◽

Complex Load ◽

Cable Stayed Bridge ◽

Long Span ◽

Load Transfer Mechanism ◽

Cable Stayed Bridges

The cable-stayed bridge got rapid development in recent years. And for long-span cable-stayed bridges, the cable-girder anchorage structure is a key component in designing. The function of the cable-girder anchorage structure is to transfer the load between cables and the main girder. With the complex load transfer mechanism and stress concentration induced by large cable force, rational design of cable-girder anchorage structure is critical to long-span cable-stayed bridges. Take a certain long-span railway cable-stayed bridge in Zhejiang Province as the investigation, the load transfer mechanism and the stress distribution state was studied by finite element model. The research indicated that the design of this anchor box was rational. The stress distribution on each plate of the anchor box was relatively uniform. And the load transfer path and mechanisms of the main components of this anchor box were clear.

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Analytical Model to Determine the Strength of Form-Fit Connection Joined by Die-Less Hydroforming

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4030878 ◽

2015 ◽

Vol 137 (5) ◽

Cited By ~ 2

Author(s):

Christian Weddeling ◽

Soeren Gies ◽

Nooman Ben Khalifa ◽

A. Erman Tekkaya

Keyword(s):

Analytical Model ◽

Load Transfer ◽

Dissimilar Materials ◽

Experimental Investigations ◽

Mean Deviation ◽

Material Parameters ◽

Load Transfer Mechanism ◽

Fundamental Understanding ◽

Increasing Demand ◽

Tube Geometry

Modern lightweight concept structures are increasingly composed of several dissimilar materials. Due to the different material properties of the joining partners, conventional and widely used joining techniques often reach their technological limits when applied in the manufacturing of such multimaterial structures. This leads to an increasing demand for appropriate joining technologies, like joining by die-less hydroforming (DHF) for connecting tubular workpieces. The present work introduces an analytical model to determine the achievable strength of form-fit connections. This approach, taking into account the material parameters as well as the groove and tube geometry, is based on a membrane analysis assuming constant wall thicknesses. Besides a fundamental understanding of the load transfer mechanism, this analytic approach allows a reliable joining zone design. To validate the model, experimental investigations using aluminum specimens are performed. A mean deviation between the calculated and the measured joint strength of about 19% was found. This denotes a good suitability of the analytical approach for the design process of the joining zone.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.4599 ◽

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.

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Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model

Energies ◽

10.3390/en14216881 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6881

Author(s):

Lichen Li ◽

Longlong Dong ◽

Chunhua Lu ◽

Wenbing Wu ◽

Minjie Wen ◽

...

Keyword(s):

Analytical Model ◽

Load Transfer ◽

Mechanical Response ◽

Field Tests ◽

Pile Group ◽

Exponential Model ◽

Heating Process ◽

Thermal Cycles ◽

Energy Pile ◽

The Cost

Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile group. In this paper, exponential model was applied to simulate the thermo-mechanical soil-pile interaction of energy pile group. Axial load transfer (τ-z) analysis was first performed to calculate the shear stress distribution in the soil, then matrix displacement method was introduced to determine the thermo-mechanical response of energy pile group. The validity of the analytical model was tested against field tests and numerical results. A case study was further performed to analyze the influence of thermal cycles and arrangement of thermally active piles on the bearing response of the whole pile group. Test results show that with the thermally activated pile in pile group, (1) differential settlement increases with thermal cycle numbers; (2) the axial force of thermally active pile increases during heating process and decreases during cooling process, and this trend varies for the surrounding nonthermal piles; (3) induced load on thermal pile increases with thermal cycles, but decreases for nonthermal piles. The proposed analytical model is expected to serve as a simple and convenient alternative for the preliminary analysis on the bearing characteristics of energy group pile.

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Research on Stress Analysis and Control of Surrounding Rock of Trapezoidal Roadways Based on Complex Variable Theory

Shock and Vibration ◽

10.1155/2021/6381785 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Zhiqiang Wang ◽

Chao Wu ◽

Jianqiao Luo ◽

Wenyu Lv ◽

Lei Shi ◽

...

Keyword(s):

Stress Concentration ◽

Stress Distribution ◽

Control Method ◽

Mapping Function ◽

Confining Pressure ◽

Field Application ◽

Surrounding Rock ◽

Wire Mesh ◽

Variable Theory ◽

Anchor Cable

Aiming at the problem of the serious deformation of the mining roadways in the trapezoidal section of the coal mine, the method of combining theoretical analysis and field application is used to study the surrounding rock control method of the trapezoidal roadways. The conformal mapping function of the trapezoidal roadways is calculated by the theory of complex change, and then from the analytical solution of the tangential stress distributed in the surrounding rock of trapezoidal roadways which is under the influence of the bidirectional unequal pressure, homogeneous, isotropic, and elastic rock mass is obtained. Research studies show that the roof-stress distribution of the trapezoidal roadways is uniform and the confining pressure is small, while the two sidewalls and the floor are opposite. The stress distribution of the two sidewalls and the floor varies greatly, and the stress concentration factor is large. The top corner of the trapezoidal roadways is basically not affected by stress concentration, but the stress concentration coefficient at the bottom corner is relatively large, and reinforcement measures are required in the roadway support. Based on the aforementioned research results, the multisupport scheme of “bolting with wire mesh and anchor cable + W-type steel belt + joist steel shed support + anchor cable grouting” was proposed to the surrounding rock of trapezoidal roadways with large stress caused by mining influence, thus solving the actual mining problem.

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Finite Element Analysis of Composite-Concrete Adhesion

Engineering Technology Conference on Energy, Parts A and B ◽

10.1115/etce2002/ot-29150 ◽

2002 ◽

Author(s):

Eyassu Woldesenbet ◽

Haftay Hailu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Load Transfer ◽

Composite Plates ◽

Alternative Methods ◽

Normal Operation ◽

Element Analysis ◽

The Finite Element Analysis ◽

The Cost

The need for the rehabilitation of bridges and structures is becoming more apparent as the number of deficient civil structure grows and the cost of replacement is becoming prohibitive. These leads to the search of alternative methods, such as rehabilitation, to put the deteriorated structures back to normal operation with the least possible cost. One such method is the use of composite plates adhesively bonded to concrete as reinforcement and to prevent the propagation of crack within the concrete structure. In this study the load transfer and the resulting stress distribution in the composite-concrete adhesion system is investigated using the finite element method. The effects of the different bond parameters are studied using the finite element. In addition, results of the finite element analysis are proved to be in agreement with the analytical solution of shear stress distribution in the adhesion layer that was developed in previous studies by the authors.

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An Analytical Model for Predicting the Stress Distributions within Single-Lap Adhesively Bonded Beams

Advances in Materials Science and Engineering ◽

10.1155/2014/346379 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Xiaocong He ◽

Yuqi Wang

Keyword(s):

Stress Distribution ◽

Boundary Conditions ◽

Plane Strain ◽

Analytical Model ◽

Longitudinal Direction ◽

Plane Strain Condition ◽

Strain Condition ◽

Stress Distributions ◽

Governing Equations ◽

Adhesively Bonded

An analytical model for predicting the stress distributions within single-lap adhesively bonded beams under tension is presented in this paper. By combining the governing equations of each adherend with the joint kinematics, the overall system of governing equations can be obtained. Both the adherends and the adhesive are assumed to be under plane strain condition. With suitable boundary conditions, the stress distribution of the adhesive in the longitudinal direction is determined.

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