STRUCTURAL STRESS ANALYSIS ON THE RUBBER DIAPHRAGM OF AIR-OPERATED VALVE

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4565-4570 ◽  
Author(s):  
YOUNG-SHIN LEE ◽  
TAIK-DONG CHO ◽  
SUNG-HO KO ◽  
HYUN-SEUNG LEE ◽  
SUNG-KY SHIN
Keyword(s):  
Stress Analysis ◽  
Maximum Stress ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Thickness Change ◽  
Damage Rate ◽  
Section Area ◽  
Edge Part ◽  
Edge Side ◽  
Spring Support

Air-operated valves are used extensively in the power-generation industry for process control and system isolation functions. A study on the prevention of damage of an air operated valve is very important. Specially, diaphragm in an actuator of an air-operated valve has the highest damage rate. In this study, the stress of diaphragm with thickness change is analyzed. For this analysis, four experiments were conducted to obtain material properties of rubber. A stress analysis is carried out by commercial FEM code, ANSYS 8.0. It is compared with tension test to verify finite element analysis. From the result of analysis, the maximum stress happened at flange edge part, and the maximum displacement happened between flange edge and spring support. This study also finds out effect of the thickness about variable thickness. Even if a section area is same, the maximum stress is varied with the thickness of edge side.

scholarly journals An Investigation into a Gear-Based Knee Joint Designed for Lower Limb Prosthesis

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
M. S. H. Bhuiyan ◽  
I. A. Choudhury ◽  
M. Dahari ◽  
Y. Nukman ◽  
S. Z. Dawal
Keyword(s):  
Knee Joint ◽  
Motion Analysis ◽  
Maximum Stress ◽  
Real Data ◽  
Fe Analysis ◽  
Knee Prostheses ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Lower Limb Prosthesis ◽  
Limb Prosthesis

A gear-based knee joint is designed to improve the performance of mechanical-type above-knee prostheses. The gear set with the help of some bracing, and bracket arrangement, is used to enable the prosthesis to follow the residual limb movement. The motion analysis and finite-element analysis (FEA) of knee joint components are carried out to assess the feasibility of the design. The maximum stress of 29.74 MPa and maximum strain of 2.393e−004 are obtained in the gear, whereas the maximum displacement of 7.975 mm occurred in the stopper of the knee arrangement. The factor of safety of 3.5 obtained from the FE analysis indicated no possibility of design failure. The results obtained from the FE analysis are then compared with the real data obtained from the literature for a similar subject. The pattern of motion analysis results has shown a great resemblance with the gait cycle of a healthy biological limb.

scholarly journals Nonlinear Finite Element Analysis of the Fluted Corrugated Sheet in the Corrugated Cardboard

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Zhiguo Zhang ◽  
Tao Qiu ◽  
Riheng Song ◽  
Yaoyu Sun
Keyword(s):  
Finite Element Analysis ◽  
Maximum Stress ◽  
Static Pressure ◽  
Nonlinear Finite Element ◽  
Drop Test ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Corrugated Board ◽  
Pressure Test ◽  
Corrugated Cardboard

The choice of corrugated medium, flute size, combining adhesive, and linerboards can be varied to design a corrugated board with specific properties. In this paper, the nonlinear finite element analysis of the fluted corrugated sheet in the corrugated cardboard based on software SolidWorks2008 was investigated. The model of corrugated board with three or more flutes is reliable for stress and displacement measurement to eliminate the influence of the number of flutes in models. According to the static pressure test, with the increase of flute heightHor arc radius of flute, the maximum stress in the models decreased and the maximum displacement increased. However the maximum stress and maximum displacement in the models increase nonlinearly in the static pressure test with the increase of the flute angleθ. According to the drop test, with the increase of flute heightH, the maximum stress of goods on the upper board in the drop test decreased. The maximum stress of the model in the drop test decreases firstly and then increases with the increase of flute angle, and the optimal flute angleθcould be 60° for corrugated board. All the conclusions are consistent with experimental data or product standards.

Force Analysis and Optimal Design of Propeller for Garbage Powder Mixer

2011 ◽  
Vol 422 ◽  
pp. 438-442
Author(s):  
Mei Fa Huang ◽  
Wei Zhao Luo ◽  
Guang Qian
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Stress Analysis ◽  
Maximum Stress ◽  
Working Condition ◽  
Force Analysis ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Simulation Results

Propeller is one of the critical parts in garbage powder mixer and affect significantly to the performance. In order to obtain a more reasonable structure, force analysis and stress analysis is carrier out for the propeller based on the actual working condition. Optimal design for the propeller is implemented by the results of stress analysis. To verify the rationality and feasibility of this mechanism, the finite element analysis for the propeller is performed by using the ANASYS software. The simulation results show that the maximum stress of the propeller is on the joint of blade and rod. The optimized propeller is satisfied with the strength requirements.

Finite Element Analysis and Optimal Design for Mold Shelf of Powder Molding Press

2010 ◽  
Vol 34-35 ◽  
pp. 1559-1562
Author(s):  
Jun Liu ◽  
Xiao Zhou ◽  
Gang Yi Zhou ◽  
Xin Long Dong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Load Distribution ◽  
Maximum Stress ◽  
Ansys Software ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Load Component ◽  
Main Support

Mold shelf of powder molding press(PMP) is the main load component. Control the deformation of mold shelf is a key problem. In this paper, based on the basic theory of finite element analysis(FEA), the constraints and load conditions of main support parts of mold shelf were simulated and analyzed . ANSYS software optimized the structure of mold shelf. Top width of the stress part increased to 15mm, its height from 80mm down to 50mm. The results showed that the maximum displacement of mold shelf reduced to 0.4740mm, the maximum stress reduced 843.44MPa to 742.38MPa. Load distribution of the mold is more uniform, deformation and displacement also improved. It provides a new method and theoretical basis for optimal design of powder molding shelf.

Finite Element Analysis of Failure in Cu Interconnect Megasonic Cleaning

2013 ◽  
Vol 562-565 ◽  
pp. 1471-1476 ◽  
Author(s):  
Ya Ting Huang ◽  
Chun Ling Meng ◽  
Nian Peng Wu ◽  
Xiu Ping Dong ◽  
Xin Chun Lu
Keyword(s):  
Finite Element ◽  
Line Width ◽  
Maximum Stress ◽  
Structural Deformation ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Megasonic Cleaning ◽  
Cu Interconnect ◽  
Bubble Collision ◽  
Low K

Megasonic cleaning has been one of the most successful techniques for Cu/low-k interconnects post-CMP cleaning. The structural deformation and stress of Cu and low-k materials in megasonic cleaning are examined with finite element method (FEM). The maximum stress is concentrated in the binding area between Cu and low-k. With decrease of Cu line width, the maximum stress increases and the max value exceeds the yield strength of Cu which results in the plastic deformation. The increasing frequency will change the bubble collision times. Therefore the fatigue is potential. The maximum displacement moves from center to the sides of top surface with increase of line width. When the line width is 25nm, the deformation is the largest.

Optimization of Translational Flexure Joints Using Corrugated Units Under Stress Constraints

2021 ◽  
pp. 1-12
Author(s):  
Canran Li ◽  
Nianfeng Wang ◽  
Fan Yue ◽  
Xianmin Zhang
Keyword(s):  
Natural Frequency ◽  
Stiffness Matrix ◽  
Maximum Stress ◽  
Stress Constraints ◽  
Axial Stiffness ◽  
Stiffness Ratio ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Different Types ◽  
Flexure Joints

Abstract When optimizing 2-DOF corrugated flexure stages, most approaches for calculating the maximum stress on the corrugated flexure (CF) beam depend on finite element analysis (FEA). The current paper introduces the design optimization for stages using CF units under stress constraints. The stress state is solved; then, based on that, the maximum displacement under stress constraints is deduced. The natural frequency formula of the micropositioning stage is further derived from the results of the stiffness matrix. The stage configurations corresponding to the maximum displacement are optimized by restricting the off-axis/axial stiffness ratio and natural frequency of the stage. The optimal results of different types are validated by FEA and experiments.

scholarly journals STRESS ANALYSIS OF TURBINE COMPONENTS UNDER SPIN RIG THERMOMECHANICAL CONDITION

Aviation ◽  
2004 ◽  
Vol 8 (4) ◽  
pp. 21-26 ◽  
Author(s):  
Lucjan Witek
Keyword(s):  
Stress Analysis ◽  
Maximum Stress ◽  
Fatigue Cracks ◽  
High Stress ◽  
Thermal Conditions ◽  
Physical Nonlinearity ◽  
Geometrical Model ◽  
Element Analysis ◽  
Second Stage ◽  
The Finite Element Analysis

This paper presents the stress analysis of a second stage turbine disc, subjected to spin rig test. To solve the problem, the finite element analysis of complex geometrical model of the disc/blade segment with much physical nonlinearity such as contact and plasticity was carried out. The adequate mechanical and thermal conditions for the spin rig test were next defined to determine the stress state of the disc/blade segment. High stress zones were found at the regions of the turbine where the first fatigue cracks are expected to appear. The results of this study are useful during the laboratory spin rig test of turbine. The zones of maximum stress indicated in this analysis will be in detail inspected under laboratory crack initiation and crack growth tests of turbine. For better understanding the phenomena occurring in spin rig test of turbine, the test details were also described.

Finite Element Analysis of Assembly Body of Conical Pick

2013 ◽  
Vol 397-400 ◽  
pp. 573-576
Author(s):  
Xin Zheng Pu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Maximum Stress ◽  
Rock Cutting ◽  
The Finite Element Method ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Conical Pick ◽  
Mechanics Performance

In order to improve the structure mechanics performance of assembly body of conical pick, the finite element method was taken to analyse assembly body of conical pick based on rock cutting theory, and the distortion law of stress and displacement of carbide tip, pick arbor and pick holder were obtained. The results show that the maximum stress appearing in pick carbide tip and its weld site is 371MPa, maximum stress of pick holder appearing in its weld site is 157MPa. Consequently, the quality of the weld should be ensured in processing and manufacturing or welding installation to reduce the performance of carbide tip and pick holder drop. The maximum displacement of assembly body of conical pick is 1.14mm, which has little influence on the structure mechanics performance of assembly body. The research results could provide some guidance for designing, manufacturing or welding the assembly body of conical pick.

The Stress Distortion Analysis of Coiler Mandrel Based on Pro/E-MECHANICAL

2011 ◽  
Vol 80-81 ◽  
pp. 975-979
Author(s):  
Yun Cai Zhao ◽  
Fang Ping Hu ◽  
De Lang Guo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
External Diameter ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Steel Rolling ◽  
Distortion Analysis ◽  
The Finite Element Analysis ◽  
The Relationship

Basing on material mechaanics and the finte element method,the interrelated analysis modules of Pro/E-MECHANICAL is used to analysis the stress and distortion of the coiler mandrel,getting the weakness of the coiler mandrel and getting the location of the maximum stress and the relationship between steel rolling external diameter and stress distortion, Obtaining the maximum stress is 82.8 Ma,the maximum displacement is 0.56 mm and getting the main reason for coiler mandrel published.Basing on the finite element analysis to improve its structure, to make its service life prolong greatly.

Finite Element Analysis of Bullet Penetration Circular Sandwich Plate

2013 ◽  
Vol 364 ◽  
pp. 149-153
Author(s):  
Pei Long Zhao ◽  
Fang Zhen Song ◽  
Nai Jian Chen ◽  
Bo Song
Keyword(s):  
Finite Element ◽  
Maximum Stress ◽  
Sandwich Plate ◽  
Time History ◽  
Von Mises Stress ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Circular Sandwich Plate ◽  
Force Time ◽  
Von Mises

A nonlinear dynamic finite element method based on ANSYS/LS-DYNA is used to simulate the physical process of a bullet penetrating circular sandwich plate at a speed of about 400 m/s. In the simulation, Lagrange algorithm, Johnson-Cook and Crushable-foam constitutive model are choosed. Energy time history curve, impact force time history curve, Von-Mises stress nephogram and displacement nephogram are obtained. At the same time, stress time history curve of the maximum stress element and displacement time history curve of the maximum displacement node are obtained. Compared with the non-sandwich plate, it is found that the use of sandwich plate can reduce the total mass, inner plate stress and displacement, and can protect inner plate well.

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