NUMERICAL AND EXPERIMENTAL STUDY ON THERMAL DEFORMATION OF AC7A AND AC4C CASTING MATERIAL

2012 ◽  
Vol 06 ◽  
pp. 570-575
Author(s):  
Hee-Sung Yoon ◽  
Ho-Dong Yang ◽  
Yool-Kwon Oh
Keyword(s):  
Finite Element Analysis ◽  
Experimental Study ◽  
Aluminum Alloy ◽  
Temperature Distribution ◽  
Numerical Analysis ◽  
Thermal Deformation ◽  
Cooling Process ◽  
Element Analysis ◽  
Automobile Tire ◽  
Temperature Distributions

The present study was numerically and experimentally investigated on thermal deformation of AC7A and AC4C aluminum alloy used as a casting material for manufacturing automobile tire mold. In this study, temperature distributions of AC7A and AC4C casting material were numerically calculated by finite element analysis (FEA). In order to compare and verify results calculated by numerical analysis, the experiment was carried out on the same condition of numerical analysis. The temperature distribution numerical analysis result revealed that the cooling patterns were predicted almost similar results during cooling process of two casting material. Also, the thermal deformation was calculated from the temperature distribution results. The thermal deformation was closely related to the temperature difference between the surface and inside of the casting.

Numerical Simulation on Thermal Strain Characteristics of Casting Mold for Automobile Tire

2007 ◽  
Vol 345-346 ◽  
pp. 893-896
Author(s):  
Yong Bum Kim ◽  
Ho Dong Yang ◽  
Yool Kwon Oh
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Thermal Strain ◽  
Cooling Process ◽  
Casting Mold ◽  
Aluminum Alloy Casting ◽  
Alloy Casting ◽  
Automobile Tire ◽  
Temperature Distributions ◽  
A New Technique

In the present study, aluminum alloy casting mold which consist of eight pieces is introduced as a new technique of tire manufacturing. For the numerical analysis, finite element method (FEM) was used to investigate the thermal strain of casting mold using aluminum alloy during the cooling process. In the concrete, the temperature distributions on the inside of each casting mold, the displacement and stress occurred by temperature variations are investigated to predict the accurate measurement variations of casting mold during the cooling process. In the end, numerical simulation results such as temperature distributions, displacement and stress are presented to help to make the effective and the best mold products. Moreover, the introduced technique of numerical simulation applying a FEM is very useful and important things in the mechanical behavior of materials, especially needs the accuracy improvement such as aluminum alloy casting mold products.

A Numerical Solution of the Inverse Problem for Thermoforming Processes Using Finite Element Analysis

2000 ◽  
Author(s):  
Chao-Hsin Wang ◽  
Herman F. Nied
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Initial Temperature ◽  
Initial Conditions ◽  
Heat Transfer Analysis ◽  
Element Analysis ◽  
Initial Temperature Distribution ◽  
Final Thickness ◽  
Temperature Distributions

Abstract Finite element analysis of thermoforming simulation based on isothermal as well as non-isothermal initial conditions has been applied successfully for predicating final thickness distributions. For these simulations, it is assumed that the initial sheet temperature is known and does not change significantly during forming at a rapid stretch rate. For a non-isothermal analysis, the temperature dependent material properties are necessary. In this paper sample results are presented for the so-called inverse thermoforming problem, where an initial temperature distribution is sought numerically that will result in a specific final thickness distribution. Thus, a finite element simulation is combined with an iterative algorithm to obtain inverse solutions for a thermoformed part. In this example, the required initial temperature distributions that result in a uniform final thickness are determined for a thermoformed part. It is shown that the calculated results are quite sensitive to perturbations in the specified initial temperature profile and thus the practical application of optimal temperature distributions may require high precision thermal sensors and controls. This initial temperature distribution can then be used for the determination of desired heating patterns on zone-controlled heaters of a thermoforming machine using transient heat transfer analysis.

Lifetime Prediction of Tires with Regard to Oxidative Aging5

2008 ◽  
Vol 36 (1) ◽  
pp. 63-79 ◽  
Author(s):  
L. Nasdala ◽  
Y. Wei ◽  
H. Rothert ◽  
M. Kaliske
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Superposition Principle ◽  
Accelerated Aging ◽  
Material Model ◽  
Aging Behavior ◽  
Element Analysis ◽  
Material Parameters ◽  
Reaction Processes

Abstract It is a challenging task in the design of automobile tires to predict lifetime and performance on the basis of numerical simulations. Several factors have to be taken into account to correctly estimate the aging behavior. This paper focuses on oxygen reaction processes which, apart from mechanical and thermal aspects, effect the tire durability. The material parameters needed to describe the temperature-dependent oxygen diffusion and reaction processes are derived by means of the time–temperature–superposition principle from modulus profiling tests. These experiments are designed to examine the diffusion-limited oxidation (DLO) effect which occurs when accelerated aging tests are performed. For the cord-reinforced rubber composites, homogenization techniques are adopted to obtain effective material parameters (diffusivities and reaction constants). The selection and arrangement of rubber components influence the temperature distribution and the oxygen penetration depth which impact tire durability. The goal of this paper is to establish a finite element analysis based criterion to predict lifetime with respect to oxidative aging. The finite element analysis is carried out in three stages. First the heat generation rate distribution is calculated using a viscoelastic material model. Then the temperature distribution can be determined. In the third step we evaluate the oxygen distribution or rather the oxygen consumption rate, which is a measure for the tire lifetime. Thus, the aging behavior of different kinds of tires can be compared. Numerical examples show how diffusivities, reaction coefficients, and temperature influence the durability of different tire parts. It is found that due to the DLO effect, some interior parts may age slower even if the temperature is increased.

Failure analysis of simple overlap bonding joints and numerical investigation of the adhered tip geometry effect on the joint strength

2021 ◽  
Vol 63 (11) ◽  
pp. 1007-1011
Author(s):  
İsmail Saraç
Keyword(s):  
Finite Element Analysis ◽  
Experimental Study ◽  
Finite Element ◽  
Reference Model ◽  
Lap Joints ◽  
Shear Stresses ◽  
Element Analysis ◽  
Single Lap Joints ◽  
Failure Loads ◽  
Previous Experimental Study

Abstract This study was carried out in two stages. In the first step, a numerical study was performed to verify the previous experimental study. In accordance with the previous experimental study data, single lap joints models were created using the ANSYS finite element analysis program. Then, nonlinear stress and failure analyses were performed by applying the failure loads obtained in the experimental study. The maximum stress theory was used to find finite element failure loads of the single lap joints models. As a result of the finite element analysis, an approximate 80 % agreement was found between experimental and numerical results. In the second step of the study, in order to increase the bond strength, different overlap end geometry models were produced and peel and shear stresses in the adhesive layer were compared according to the reference model. As a result of the analyses, significant strength increases were calculated according to the reference model. The strength increase in model 3 and model 5 was found to be 80 % and 67 %, respectively, relative to the reference model.

Forging Process Analysis of 6061 Aluminum Alloy Motorcycle Brake Parts

2021 ◽  
Vol 901 ◽  
pp. 176-181
Author(s):  
Tung Sheng Yang ◽  
Chieh Chang ◽  
Ting Fu Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Metal Forming ◽  
Process Analysis ◽  
Surface Hardness ◽  
Dimensional Accuracy ◽  
Die Design ◽  
Element Analysis ◽  
Forging Process

This paper used finite element analysis of metal forming to study the forging process and die design of aluminum alloy brake parts. According to the process parameters and die design, the brake parts were forged by experiment. First, the die design is based on the product size and considering parting line, draft angle, forging tolerance, shrinkage and scrap. Secondly, the finite element analysis of metal forming is used to simulate the forging process of aluminum alloy brake parts. Finally, the aluminum alloy brake levers with dimensional accuracy and surface hardness were forged.

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