A novel stress distribution analytical model of O-ring seals under different properties of materials

2017 ◽  
Vol 31 (1) ◽  
pp. 289-296 ◽  
Author(s):  
Di Wu ◽  
Shaoping Wang ◽  
Xingjian Wang
Keyword(s):  
Stress Distribution ◽  
Analytical Model ◽  
Properties Of Materials

Effect of Damping Constants and Stress Distribution on the Resonance Response of Members

1953 ◽  
Vol 20 (2) ◽  
pp. 201-209
Author(s):  
B. J. Lazan
Keyword(s):  
Stress Distribution ◽  
Amplification Factor ◽  
Engineering Practice ◽  
Distribution Factor ◽  
Mathematical Relationship ◽  
Cross Sectional ◽  
Resonance Response ◽  
Properties Of Materials ◽  
Material Factor ◽  
Sectional Shape

Abstract The amplitude of vibration of a member at resonance, as defined by its resonance amplification factor, is analyzed in relationship to the damping properties of materials. Data are presented on damping energy to indicate the effect of stress magnitude, stress history, and temperature. Based on the mathematical relationship found to exist between damping and stress magnitude the resonance amplification factors are determined for a variety of direct stress members and beams. It is shown that the amplification in vibration caused by resonance may be considered to be the product of three basic factors, i.e., (a) the material factor, (b) the cross-sectional shape factor, and (c) the longitudinal stress-distribution factor. The first of these factors may be calculated from the damping and dynamic modulus properties of the material and the last two from the shape and loading characteristics of the member. Diagrams are presented to show these basic factors as functions of the damping exponent and other variables for members commonly encountered in engineering practice. Experimental data are presented to confirm the equations derived for resonance amplification factor of members having various shapes and stress distribution.

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

2005 ◽  
Vol 237-240 ◽  
pp. 145-150 ◽  
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.

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

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.

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

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
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.

A Micromechanical Bending Stage for Studying Mechanical Properties of Materials Using Nanoindenter

2015 ◽  
Vol 82 (12) ◽  
Author(s):  
Mohamed Elhebeary ◽  
M. Taher A. Saif
Keyword(s):  
Analytical Model ◽  
Small Volume ◽  
Bending Test ◽  
Bending Stress ◽  
Entire Volume ◽  
Premature Failure ◽  
State Of Stress ◽  
3D Printed ◽  
Properties Of Materials ◽  
Good Agreement

An analytical and computational model of a novel bending stage is presented. The stage applies bending moments on micro/nanoscale beam specimens using a nanoindenter. In uniaxial tests, any flaw within the entire volume of the specimen may lead to fracture before material yields. The new stage minimizes the volume of material under a uniaxial state of stress in the specimen, but maximizes bending stress over a small volume such that high stresses can be reached within a small volume on the specimen without a premature failure by fracture. The analytical model of the stage accounts for the geometric nonlinearity of the sample, but assumes simplified boundary conditions. It predicts the deflection and stresses in the specimen beam upon loading. The numerical model of the stage and the specimen employing a finite element (FE) package tests the validity of the analytical model. Good agreement between analytical and numerical results shows that the assumptions in the analytical model are reasonable. Therefore, the analytical model can be used to optimize the design of the stage and the specimen. A design of the stage is presented that results in axial/bending stress < 2% in the sample. In order to test the feasibility of the proposed design, a 3D printed stage and a sample are fabricated using the Polyamide PA2200. Bending test is then carried out employing an indenter. Elastic modulus of PA2200 is extracted from the load-deflection data. The value matches closely with that reported in the literature.

An Analytical Model for Investigations on the Stress Distribution in Planar Solid Oxide Fuel Cells

2017 ◽  
Vol 78 (1) ◽  
pp. 2293-2307
Author(s):  
Vinzenz Guski ◽  
Keita Iritsuki ◽  
Motohisa Kamijo ◽  
Siegfried Schmauder
Keyword(s):  
Fuel Cells ◽  
Stress Distribution ◽  
Solid Oxide Fuel Cells ◽  
Analytical Model ◽  
Solid Oxide ◽  
Oxide Fuel

Analytical model and application of stress distribution on mining coal floor

2008 ◽  
Vol 18 (1) ◽  
pp. 13-17 ◽  
Author(s):  
Shu-yun ZHU ◽  
Zhen-quan JIAN ◽  
Hong-liang HOU ◽  
Wei-guo XIAO ◽  
Pu YAO
Keyword(s):  
Stress Distribution ◽  
Analytical Model ◽  
Mining Coal

An Analytical Model for Predicting Contact Stress and Sliding Wear of a Three-Dimensional Textured Surface

2009 ◽  
Author(s):  
Elon J. Terrell ◽  
C. Fred Higgs
Keyword(s):  
Stress Distribution ◽  
Stress Analysis ◽  
Analytical Model ◽  
Contact Stress ◽  
Sliding Wear ◽  
Flat Surface ◽  
Three Dimensional ◽  
Textured Surface ◽  
Two Dimensional ◽  
Contact Stress Distribution

In this paper, an analytical model for predicting the contact stress and wear distribution between a textured surface and a compliant flat is presented. The modeling formulation is based upon a two-dimensional stress analysis of the flat, and it allows the contact stress distribution to be found from the distribution of the sample deflection into the flat surface. The wear evolution was calculated from the contact stress.

Sign in / Sign up

Export Citation Format

Share Document