Stress Analysis(1). FEM Analysis.

The paper describes the experimental tests of steel bearing elements, which were aimed at obtaining material, geometric and strength characteristics of the fillet welds. Preparation of experiment consisted in defining of numerical models of tested samples using FEM analysis and the commercial software ANSYS. Data obtained from described experimental tests are necessary for further numerical modelling of stress analysis of steel structural supporting elements.

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Stress Analysis for Shrink Fitting System Used for Ceramics Conveying Rollers

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.513 ◽

2008 ◽

Vol 385-387 ◽

pp. 513-516 ◽

Cited By ~ 1

Author(s):

Hendra ◽

Masakazu Tsuyunaru ◽

Naoaki Noda ◽

Yasushi Takase

Keyword(s):

Fracture Toughness ◽

Stress Analysis ◽

Maximum Stress ◽

Fem Analysis ◽

Maximum Tensile Stress ◽

Iron And Steel ◽

Rolling Mills ◽

Shrink Fitting ◽

New Type ◽

The Cost

Cast iron and steel conveying rollers used in hot rolling mills must be changed very frequently because conveyed strips with high temperature induces wear on the roller surface in short periods. This failure automatically stops the production line for repair and maintenance of conveying rollers. In this study a new type of roller is considered where a ceramics sleeve is connected with two short shafts at both ends by shrink fitting. Here, a ceramics sleeve provides longer life and therefore reduces the cost for the maintenance. However, for the hollow ceramics rollers, care should be taken for maximum tensile stresses appearing at both edges of the sleeve. In particular, because fracture toughness is extremely smaller compared with the value of steel, stress analysis for the roller is necessary for ceramics sleeve. In this study FEM analysis is applied to the structure, and the maximum stress has been investigated with varying the dimensions of the structure. It is found that the maximum tensile stress appearing at the end of sleeves takes a minimum value at a certain amount of shrink fitting ratio.

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FEM Stress Analysis and Sealing Performance in Pipe Flange Connections With Adhesive Subjected to Internal Pressure and External Bending Moments

Design Engineering, Parts A and B ◽

10.1115/imece2005-80621 ◽

2005 ◽

Author(s):

Masahide Katsuo ◽

Toshiyuki Sawa ◽

Yuki Kikuchi

Keyword(s):

Internal Pressure ◽

Stress Analysis ◽

Bending Moment ◽

Fem Analysis ◽

Bending Moments ◽

3 Dimensional ◽

Leakage Test ◽

Sealing Performance ◽

Flange Thickness ◽

Good Agreement

This study deals with the stress analysis and the estimation of sealing performance of the pipe flange connections with an adhesive under an internal pressure and an external bending moment are analyzed by using the 3-dimensional elastic finite element method (FEM). The experiment of the leakage test of the connections with an adhesive was carried out by applying the above loads to the connections. From the FEM analysis, the following results were obtained; (1) when an internal pressure is applied to the flange connections, the compressive stress at the interface between a flange and an adhesive increases proportionally from the inner side of the interface to outside, and (2) when an internal pressure and a bending moment apply to the flange connections, the stress distribution at the half part of the interface increases as the external bending moments increase and also Young’s modulus of the adhesive increases. From the experiments, the following results were obtained: (1) sealing performance of the pipe flange connections with an adhesive under an internal pressure and an external bending moment increases as the flange thickness and an initial clamping force of bolts increases and (2) the sealing performances were not found between the connections with an adhesive and that with a gasket combining an adhesive. Furthermore, the numerical results are in fairly good agreement with the experimental results.

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Finite Element Stress Analysis and Evaluation of the Sealing Performance in Pipe Fittings With Adhesive for Threaded Connections Under Internal Pressure and Bending Moment

Design Engineering, Parts A and B ◽

10.1115/imece2005-80659 ◽

2005 ◽

Author(s):

Mitsutoshi Ishimura ◽

Masahide Katsuo ◽

Toshiyuki Sawa ◽

Masamichi Serizawa

Keyword(s):

Finite Element ◽

Internal Pressure ◽

Stress Analysis ◽

Compressive Stress ◽

Bending Moment ◽

Fem Analysis ◽

Pipe Fitting ◽

3 Dimensional ◽

Threaded Connections ◽

Sealing Performance

In practice, PTFE tape is being used for sealing of a pipe fitting. However, the efficiency, the decrease in work time, and the sealing performance can be improved by using adhesive instead of the tape. When such a pipe fitting is under an internal pressure and external bending moment by an internal fluid and others, however, an influence in the sealing performance is taken by how to use an adhesion. This study deals with the stress analysis and the evaluation of the sealing performance of the pipe fitting with an adhesive under an internal pressure and an external bending moment analyzed by using the 3-dimensional elastic finite element method. Furthermore, the experiment of the leakage test of the pipe fitting with an adhesive was carried out when the above loads were applied to the pipe fitting. From 3-D FEM analysis, the following results were obtained: (1) the stress distribution at the interface between thread and adhesive on the side of the internal pressure is tensile stress, and stress on the opposite side is compressive, (2) the stresses at the area of the clearance between the valley of the screw and the mountain increase as the numbers of turns of the thread in fittings increase, and (3) the compressive stress at the side of the tensile part in the fittings decrease as the external bending moments increase. However, the sealing performance will not change when the bending moment is not so great because the compressive stress at the side of the compressive part in the fitting increases. From the leakage tests, the following results of the sealing performance were obtained: (1) the sealing performance of a fittings with adhesive under an internal pressure and a bending moment didn’t decrease when bending moment was not so great, and (2) when it exceeds fixed pressure, rapid leakage from the fitting with adhesive occurred by the exfoliation of the adhesive. Furthermore, the numerical results are in fairly good agreement with the experimental results.

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Evaluation of Fatigue Endurance Foran Ultra Lightweight Inline Skate Frame

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.739.431 ◽

2013 ◽

Vol 739 ◽

pp. 431-436

Author(s):

Ho Kyung Kim

Keyword(s):

Stress Analysis ◽

Tensile Properties ◽

Fatigue Limit ◽

Endurance Limit ◽

Fem Analysis ◽

Fatigue Tests ◽

Von Mises Stress ◽

Al 7075 ◽

Von Mises ◽

Fatigue Endurance

In order to evaluate the fatigue endurance for an ultra lightweight inline skate frame, FEM analyses was performed. The tensile properties and an S-N curve were determined through tensile and fatigue tests on a modified Al-7075+Sc alloy. The yield and ultimate tensile strengths were 553.3 MPa and 705.5 MPa, respectively. The fatigue endurance limit of this alloy was 201.2 MPa. To evaluate the fatigue endurance of the inline skate frame, the S-N data were compared with the stress analysis results through FEM analyses of the frame. The maximum von Mises stress of the frame was determined to be 106 MPa through FEM analysis of the frame, assuming that the skater weight is 75 kg. Conclusively, on the basis of the fatigue limit, the inline skate frame has a safety factor of approximately 2.0.

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Comparison between 3D FEM and Standard ISO Tooth Root Stresses

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.488-489.85 ◽

2011 ◽

Vol 488-489 ◽

pp. 85-88

Author(s):

Gordana Marunić ◽

Goran Gregov ◽

Vladimir Glažar

Keyword(s):

Stress Analysis ◽

Practical Interest ◽

Fem Analysis ◽

Geometrical Parameters ◽

Tooth Root ◽

3D Fem ◽

Stress Calculation ◽

Stress Behaviour ◽

Root Stress ◽

The Web

The paper deals with the discussion how nominal spur tooth root stress of thin-rimmed gear determined in accordance with the standard ISO 6336-3:2006, method B, agrees with the results of the 3D FEM stress analysis. The procedure proposed by standard ISO for the tooth root stress calculation doesn’t identify the stress behaviour related to mutual affects of characteristic thin-rimmed gear geometrical parameters. Therefore, the 3D FEM analysis of tooth root stress has been performed for gear structures with middle and offset web with various rim and web thickness. The rim thickness has covered and slightly overcome the backup ratio defined by ISO procedure, while the web thickness has covered the range of practical interest.

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Hydrostatic pressure loads for a tank using “CID Distributed Loads” fields in a PATRAN FEM model

INCAS BULLETIN ◽

10.13111/2066-8201.2021.13.4.16 ◽

2021 ◽

Vol 13 (4) ◽

pp. 197-204

Author(s):

Daniela BARAN ◽

Mihaela PETRE

Keyword(s):

Hydrostatic Pressure ◽

Critical Load ◽

Stress Analysis ◽

Fem Analysis ◽

Fem Model ◽

The Real ◽

Fuel Tanks

The purpose of this paper is to present a practical way to introduce distributed loads on the walls of a tank in order to perform a FEM analysis using PATRAN/NASTRAN programs. The problem is generated mainly by the fact that there are gravitational accelerations in the three directions of the moving airplane that produce a great number of combinations of inertial loads and consequently a great number of critical load cases. We compared the performed stress analysis with the loads obtained with this method in different cases for 𝑛𝑛=1. (Different forms of the fuel tanks and different placements of the tank inside the aircraft). The form and the density of the grid do not significantly affect the precision of the real inertia loads. Using the presented method one can reduce the volume of FEM files used in the analysis and can quite accurately reproduce the pressure loads on the fuel of a moving aircraft.

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FEM Analysis for Sealing Performance of Hydraulic Pressure Brake Hose Caulking Portion

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.169 ◽

2008 ◽

Vol 385-387 ◽

pp. 169-172 ◽

Cited By ~ 1

Author(s):

Hirofumi Kawahara ◽

Shinpei Yoshimura ◽

Naoaki Noda

Keyword(s):

Stress Analysis ◽

Radial Direction ◽

Permanent Deformation ◽

Fem Analysis ◽

Initial Deformation ◽

Hydraulic Pressure ◽

Normal Stresses ◽

Power Steering ◽

High Durability ◽

Sealing Performance

Usually, development of automobile brake hose and power steering hose has been realized through evaluating several actual prototype hoses experimentally. Recently, high durability and high development effect for brake hose has been required because periodic exchange for the brake hose has not been requested any more. In this study, therefore, stress analysis by FEM is performed to the crimped portion of hydraulic pressure brake hose in order to promote the development of the automobile hoses more efficiently. It is found that large normal stresses σr in the radial direction appear at the crimped portion between the nipple and inner rubber. The results suggest that several grooves on the nipple surface may be useful because they cause large σr, which may improve the sealing performance. The effect of permanent deformation of the rubber on the sealing performance is discussed by assuming initial deformation of the rubber at the crimped portion.

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Characteristic Analysis of High-Speed Permanent Magnet Synchronous Motor

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.34.18790 ◽

2018 ◽

Vol 7 (3.34) ◽

pp. 136

Author(s):

Tae Kyoung Bang ◽

Kyung Hun Shin ◽

Jeong In Lee ◽

Cheol Han ◽

Seong Kook Cho ◽

...

Keyword(s):

Stress Analysis ◽

Permanent Magnet ◽

Mechanical Stress ◽

Analytical Method ◽

High Speed ◽

Permanent Magnet Synchronous Motor ◽

Fem Analysis ◽

Characteristic Analysis ◽

Protective Tube

Background/Objectives: This paper presents characteristic analysis of High-SpeedPermanent Magnet Synchronous Machine (High-Speed PMSM) by using FEM (Finite Element Method) tools. The High-Speed PMSM need the protective tube with non-magnetic materials that protect the scattering of permanent magnet, it is necessary that analyzed about mechanical analysis.Methods/Statistical analysis: For preventing and improving, the fracture of the rotor of High-Speed PMSM, it is important that analyzed characteristic of mechanical stress, it should not be analyzed that occurred the fracture and decreased the performance, since the structure of rotor. However, structure analysis is usually performed by using FEM, which need the big amount of time consuming. Therefore, in this paper is derived the mechanical stress of rotor by using analytical method of stress.Findings: The results of the stress analysis are compared with the results of FEM analysis that validated the analytical method of stress analysis. Based on the results of the analysis, an analytical model was fabricated. Through the experiments, the presence of rotor breakage was examined and the performance was measured.Improvements/Applications: It can be applied to stress analysis and characterization of superhigh speed machine through the analysis methods presented in this paper.

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