Abstract
Abstract The angular deformation is key parameter in composite manufacturing for curvature surfaces. Process Induced Distortions (PID’s) are a major problem while manufacturing a composite part using autoclave process. Spring-back or spring-in is one of the PID in autoclave process. Spring-in effect either increase or decrease at angled section during curing of composite laminates. In this paper, L-shaped composite part has been manufactured using autoclave process. The material properties like glass transition temperature, heat reaction, crystallization temperature, Coefficient of Thermal Expansion have been measured for the cured component by using various testing techniques. Spring-in angle has been found for various number of layers and layup orientation. The simulation has been performed in ABAQUS software along with the COMPRO plug-in for each component. The variation of spring-in angle has been observed with changing material properties. The experimental results have been compared with simulation results. The percentage variation of spring-in deformation for experimental and simulation results has been found in the range of 5-7%.
Highlights
A composite material is a combination of two or more chemically different materials on a macroscopic scale to get the best properties out of its constituents which are not possible to obtain from any other materials
The properties of cured component like glass transition temperature, heat of reaction and coefficient of thermal expansion have been measured by using analysis techniques
The ABAQUS software along with the COMPRO plug-in has been selected for simulation
Summary
A composite material is a combination of two or more chemically different materials on a macroscopic scale to get the best properties out of its constituents which are not possible to obtain from any other materials. The properties of the cured component are very important and it depends on the selection of manufacturing processes. The important properties after curing are glass transition temperature, heat reaction, crystallization temperature, Coefficient of Thermal Expansion etc. Jonghyun Kim et al [14] has studied on the cure kinetics of prepreg laminates by using dynamic and isothermal DSC techniques. Shim et al [15] has performed the experiment by using different epoxy base prepreg for measurement of glass transition temperature. The spring-in angle has been measured for each component using universal bevel protector. The properties of material like glass transition temperature, heat of reaction and coefficient of thermal expansion have been measured for cured component. The variation of spring-in angle with respect to changing the value of material properties has been studied
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