ANALISIS MODUS NORMAL DAN KEKUATAN STRUKTUR SIRIP ROKET-168 DARI BAHAN AL-PLATE

2010 ◽  
Vol 2 (1) ◽  
Author(s):  
Sugiarmadji ◽  
Setiadi
Keyword(s):  
Safety Factor ◽  
Structural Strength ◽  
Leading Edge ◽  
Von Mises Stress ◽  
Strength Analysis ◽  
Eigenvalues And Eigenvectors ◽  
Maximum Value ◽  
Von Mises

Structural strength analysis on Motor Rocket-168 fins was carried out to determine static stresses due to aerodynamic loadings. Here, 90 mm of the root chord area from leading edge was unclamp (free). The analysis results showed the maximum value of von Mises stress is Q von mises = 42.40 MPa. For 90 mm condition un clamp (free) we obtained the safety factor of the material for fins structures made of Al-Plate is SF=3.39. For 67.5 mm of 90 mm root chord area constrainted at 12456 directions, it was found Qvm equal 11,26 MPa and has higher safety factor. Eigenvalues and eigenvectors of the fins structures. The results showed that the eigenvalues of the fin structures are Q1 equal 198,47 Hz, Q2 equal 616,34 Hz, Q3 equal 1080,97 Hz, Q4 equal 1704,33 Hz, Q5 equal 2386,82 Hz, dan Q6 equal 2770,94 Hz.

Effects of Difference Leading Edge Shapes on Numerical Simulation of Centrifugal Compressor

2012 ◽  
Vol 455-456 ◽  
pp. 351-355
Author(s):  
Tao Sun ◽  
Xiao Fang Wang ◽  
Yi Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Centrifugal Compressor ◽  
Structural Strength ◽  
Leading Edge ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Reliability Improvement ◽  
Von Mises ◽  
Large Flow

In order to research the effects of leading edge shapes on the strength of centrifugal compressor compeller, the shrouded impellers of a large centrifugal compressor were introduced for finite element analysis. In the present study, the geometric models of 3 shrouded impellers were established in Solidworks 2007, and then numerical simulations were carried out using ANSYS. Through visualization of the computational result of the impellers with a square leading edge, a semi-circular leading edge and a elliptical leading edge, it was clarified by comparison that different leading edge shapes had significant influences on the compressor strength. According to the charts of the Von Mises stress versus leading edge shapes, it was indicated that approximately a 27% drop and a 32% drop in maximum Von Mises stress value occurred in the shrouded impellers of a semi-circular leading edge and a elliptical leading edge compared to a square leading edge respectively. That is, the semi-circular leading edge or elliptical leading edge employed in a centrifugal compressor would dramatically improve structural strength. This paper aims to provide the reference significance the structural optimization and reliability improvement of a large flow centrifugal compressor.

scholarly journals Analysis of Tube Design for Clean Water from Stainless Steel 304 and 201

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhammad Amin Putro ◽  
Prantasi Harmi Tjahjanti
Keyword(s):  
Stainless Steel ◽  
Safety Factor ◽  
Pure Water ◽  
Von Mises Stress ◽  
Maximum Displacement ◽  
Maximum Value ◽  
Stainless Steel 304 ◽  
Thickness Variations ◽  
Von Mises ◽  
Ss 304

This study aims to design the water tube for pure water namely a set of processing tools used to place the water using Autodesk Inventor 2016 software. The data which inputted is stainless steel SS 304 and SS 201, because both of them have the Cr and Ni elements, which will be used as tubes and the top and bottom caps. The results of running data are von mises stress, displacement, and safety factor. The output data were used to obtain the most efficient material and thickness variations between 1.5mm, 2mm, and 3mm. The most suitable and efficient result shown at 3mm thick SS 304 with the maximum value of von mises stress is 14.62 MPa, a maximum displacement of 0.013mm, and a safety factor of 15.

scholarly journals The effect of fillet radius and length of the thick-walled cylinder on Von Mises stress and safety factor for rocket motor case

2020 ◽  
Author(s):  
Lasinta Ari Nendra Wibawa ◽  
Kuncoro Diharjo ◽  
Wijang Wisnu Raharjo ◽  
Bagus Hayatul Jihad
Keyword(s):  
Safety Factor ◽  
Rocket Motor ◽  
Von Mises Stress ◽  
Fillet Radius ◽  
Von Mises ◽  
Walled Cylinder

Design improvement and fatigue analysis for a bicycle handlebar stem system using uniform design method and genetic algorithm

2020 ◽  
Vol 234 (11) ◽  
pp. 2266-2278
Author(s):  
Cho-Pei Jiang ◽  
Ching-Wei Wu ◽  
Yung-Chang Cheng
Keyword(s):  
Genetic Algorithm ◽  
Objective Function ◽  
Safety Factor ◽  
Uniform Design ◽  
Optimization Procedure ◽  
Bending Test ◽  
Von Mises Stress ◽  
Kriging Interpolation ◽  
Optimized Design ◽  
Von Mises

An integrating optimization procedure is presented to improve the von Mises stress and fatigue safety factor for a handlebar stem system in a bicycle system. The optimization procedure involves uniform design of experiment, Kriging interpolation, genetic algorithm, and nonlinear programming method. Using ANSYS/Workbench software and the ISO 4210 bicycle handlebar stem testing standard, the von Mises stress for the lateral bending test simulation and the fatigue safety factor for the fatigue test simulation is calculated. The von Mises stress and fatigue safety factor are combined into a single and integrated objective function, and Kriging interpolation is then used to create the surrogate model of the integrated objective function. When the integrating optimization procedure is used, the integrated objective function demonstrates that the von Mises stress for the optimized handlebar stem is reduced to 225 MPa and the fatigue safety factor increases to 1.796. This shows that the optimized design increases the strength of the handlebar stem. The proposed technique yields a handlebar stem with an optimized shape.

scholarly journals Numerical Analysis of the Crack Inspections Using Hybrid Approach for the Application the Circular Cantilever Rods

2021 ◽  
Vol 29 (2) ◽  
Author(s):  
Saddam Hussein Raheemah ◽  
Kareem Idan Fadheel ◽  
Qais Hussein Hassan ◽  
Ashham Mohammed Aned ◽  
Alaa Abdulazeez Turki Al-Taie ◽  
...  
Keyword(s):  
Structural Design ◽  
Hybrid Approach ◽  
Von Mises Stress ◽  
Whole Body ◽  
Total Deformation ◽  
Motion Equations ◽  
Maximum Deformation ◽  
Simulation Process ◽  
Maximum Value ◽  
Von Mises

The present study aims to investigate crack presence in a rigid steel beam so that it can be considered in structural design. A finite element method (FEM) had been used with the Ansys 16.1 software to simulate the whole steel body with three different forces and moments with a magnitude force subjected at the free end of the beam. The steel rod had been considered as simple cantilever to be modelled by the software. Von Mises stress had been considered in the simulation process where the maximum value of stress due to applied load and moment was 1.9 MPa. Total deformation of the whole body had also been considered to instigate the maximum deformation (4.3mm) due to applied loads and moments. Furthermore, MATLAB and through fuzzy logic had been used to assist in the investigation of cracks. Both approaches had been governed by the Euler-Bernoulli theory for free vibration of motion equations. The other aim of this study is to evaluate results received from the Ansys with MATLAB for the same boundary conditions as the case.

New Triaxial Connection Safety Factor for Tubular Design

2021 ◽  
Author(s):  
Malcolm A Goodman
Keyword(s):  
Hydrostatic Pressure ◽  
Normal Stress ◽  
Safety Factor ◽  
Drill Pipe ◽  
Von Mises Stress ◽  
Threaded Connections ◽  
Shear Component ◽  
Physical Tests ◽  
The Mean ◽  
Von Mises

Abstract The API equation for internal leak of API connections is uniaxial since it ignores axial force and external backup pressure. ISO 13679 for qualification of premium connections is biaxial at best. It includes tension/compression but ignores backup pressure for both internal and external leak tests. For tubular design, this paper introduces a new fully triaxial safety factor for threaded connections with dependence on thread shear and hydrostatic pressure. Hydrostatic behavior is modelled with the Mean Normal Stress, and thread shear behavior is modelled with the shear component of the von Mises Stress. A Leak Line for use like the pipe body ellipse is proposed for quick leak assessment. Leak ratings are presented for an example case of 7-in. 35-ppf N80 LTC. The new triaxial safety factor with two connection constants applies to all types of threaded connections, including tubing, casing, and drill pipe, so long as the two constants are evaluated with appropriate but simple physical tests.

New Triaxial Connection Safety Factor for Tubular Design

2021 ◽  
pp. 1-11
Author(s):  
Malcolm A. Goodman
Keyword(s):  
Finite Element Analysis ◽  
Safety Factor ◽  
American Petroleum Institute ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Threaded Connections ◽  
Shear Component ◽  
Physical Tests ◽  
The Mean ◽  
Von Mises

Summary The American Petroleum Institute (API) equation for internal leak of API connections is uniaxial because it ignores axial force and external backup pressure. The ISO 13679 (2002) standard for qualification of premium connections is biaxial at best. It includes tension/compression but ignores backup pressure for both internal and external leak tests. For tubular design, this paper introduces a new fully triaxial safety factor for threaded connections with dependence on thread shear and hydrostatic pressure. Triaxial hydrostatic behavior is modeled with the mean normal stress, and thread shear behavior is modeled with the shear component of the von Mises stress. A leak line for use like the pipe body ellipse is proposed for quick leak assessment. Leak ratings and correlation with finite element analysis (FEA) results are presented for an example case of a 7-in.35-ppf N80 long-thread-casing (LTC) connection. The new triaxial safety factor with two connection constants applies to all types of threaded connections, including tubing, casing, and drillpipe, so long as the two constants are evaluated with appropriate but simple physical tests.

Numerical Investigations of the Long Blade Performance Using RANS Solution and FEA Method Coupled With One-Way and Two-Way Fluid-Structure Interaction Models

2017 ◽  
Author(s):  
Minyan Yin ◽  
Jun Li ◽  
Liming Song ◽  
Zhenping Feng
Keyword(s):  
Rotor Blade ◽  
Mechanical Performance ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Leading Edge ◽  
Von Mises Stress ◽  
Maximum Displacement ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Von Mises

The aerodynamic and mechanical performance of the last stage was numerically investigated using three-dimensional Reynolds-Averaged Navier-Stokes (RANS) solution and Finite Element Analysis (FEA) coupled with the one-way and two-way fluid-structure interaction models in this work. The part-span damping snubber and tip damping shroud of the rotor blade and aerodynamic pressure on rotor blade mechanical performance was considered in the one-way model. The two-way fluid-structure interaction model coupled with the mesh deformation technology was conducted to analyze the aerodynamic and mechanical performance of the last stage rotor blade. One-way fluid-structure interaction model numerical results show that the location of nodal maximum displacement moves from leading edge of 85% blade span to the trailing edge of 85% blade span. The position of nodal maximum Von Mises stress is still located at the first tooth upper surface near the leading edge at the blade root of pressure side. The two-way fluid-structure interaction model results show that the variation of static pressure distribution on long blade surface is mostly concentrated at upper region, absolute outflow angle of long blade between the 40% span and 95% span reduces, the location of nodal maximum displacement appears at the trailing edge of 85% blade span. Furthermore, the position of nodal maximum Von Mises stress remains the same and the value decreases compared to the oneway fluid-structure model results.

scholarly journals Influence of friction in a case of impact simulation

2020 ◽  
Vol 12 (4) ◽  
pp. 145-154
Author(s):  
George-Ghiocel OJOC ◽  
Viorel Totolici RUS ◽  
Christian POPESCU ◽  
Catalin PIRVU ◽  
Lorena DELEANU
Keyword(s):  
Experimental Data ◽  
Constitutive Model ◽  
Time Moment ◽  
Von Mises Stress ◽  
Rigid Plate ◽  
Impact Simulation ◽  
Maximum Value ◽  
Opposite Face ◽  
Von Mises ◽  
The Impact

This paper presents an analysis of two cases, simulating the impact of a cylindical projectile on a perfectly rigid plate. One case is run without friction, the second one is run taking into account a friction coeficient between the plate and the projectile. The authors used for the projectile the same material constitutive model for both cases, based on experimental data and model developed by Johnson and Cook. Here, the comparing criteria were the maximum value of von Mises stress, the velocity and acceleration of the central point on the opposite face to the contact face of the projectile. Introducing friction, the simulation is more realistic. Taking into account friction, the projectile is less deformed and there was no edge breakage, at the same time moment.

scholarly journals Static Strength Analysis of Meat Grinder Frame

2021 ◽  
Vol 2 (6) ◽  
pp. 2179-2186
Author(s):  
Abdul Rahman Agung Ramadhan ◽  
Eko Aprianto ◽  
Abdul Muchlis
Keyword(s):  
Safety Factor ◽  
Theoretical Calculations ◽  
Essential Amino Acids ◽  
Static Strength ◽  
Load Force ◽  
Percentage Error ◽  
Strength Analysis ◽  
Grinding Machine ◽  
Von Mises ◽  
Error Percentage

Meat is one of the agricultural commodities needed to meet protein needs, because meat contains high quality protein, which is able to contribute complete essential amino acids. The purpose of this paper is to design, analyze the static strength of the frame based on theoretical calculations and simulations on solidwork 2018 software. This machine consists of a frame, reservoir, grinding shaft, transmission, and electric motor. The results of the design obtained a Meat Grinding Machine with Length: 610 mm, Width: 500 mm and Height: 750 mm. The material used is 2024-O Alloy with a modulus of elasticity of 72,400 N/mm2. The load force obtained is 576.32 N. And the value from the analysis is the displacement value of 0.174 mm and for theoretical calculations, the displacement value is 0.176 mm. So, the value of the percentage error is 1.176%. For the von Mises value of 68,970 MPa, and for calculations based on the theory, the von Mises value is 52,499 MPa. So, the value of the error percentage is 0.238%. And for the value of the safety factor obtained a value of 1,087, and for calculations based on the theory, the value of the safety factor is 1.428. So, the value of the error percentage is 0.313%.

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