| Summary: | 碩士 === 大葉大學 === 工業工程與科技管理學系 === 99 === In this research, finite elements method such as a plane, and a solid are used to build a laminated composite model for analyzing various cracks therein for comparison with the literature to confirm the accuracy of the model. In the experiments are used manufacturing methods such as resin transfer molding (RTM) and the hand lay-up technique that carbon fiber prepreg of materials are used to produce differential types of cracks such of bilateral, central, and centrally perforated in composite laminate composites as well as in a patch test fragment for a tensile test. This study primarily used ANSYS finite element software to analyze the strain and stress intensity factors of composite laminates and the cracks in a patch test fragment to establish an accurate analytical model. Furthermore, ANSYS simulation to analyze the structure of cracks can be recommended.
In the optimal design, this research is used the Particle Swarm Optimization (PSO) method that the differential conditions (length -to- width ratio (b/a), layer angles of composite patch, boundary and force conditions) found optimal manufacturing process parameters of composite plate specimen with a crack patch. This research is achieved the goal of maximum stiffness in composite materials under the impact. Finally, this theory analysis values are compared experimental data to prove the correct of the theory analysis and optimal design.
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