VaRTM성형공법에 의해 제조된 첨단복합소재의 물리적,기계적 특성 평가 및 그 응용

Abstract

Composite materials are emerging as candidate materials for the industrial areas especially for the aerospace business due to the long fatigue life, their significant increase in elastic modulus and strength compared to conventional materials.

Especially, composites are expanding a using on transportation vehicles like automobiles, ships, and air crafts etc. The main factor of this expanding is high specific strength. It accords with object requiring high quality and efficient of energy. But manufacturing of element that was made of composite requires many raw materials and high tooling cost for special process, so we needs a reduction of these costs to make best efficient.

There are various process to fabricate the composites parts, such as autoclave process, RTM and SRIM, etc. These processes is not only cost so much for the metallic tools and the various equipments such as a hot press, an autoclave or a curing oven, but also to be very limited to their shape and size of the composites parts.

VaRTM (Vacuum assisted Resin Transfer Molding) process is introduced as the new process that can improve these problems as above. VaRTM process is adaptable enough for the aerospace industry because it can achieve the same or superior fiber volume fraction compared with autoclave process.

This study is conducted to show as follows.

1. The development of the processing method of VaRTM

2. The possibility with the evaluation of the properties of three kinds of candidates for high temperature resin which is using the composite part of air craft, will be used for this process to manufacture the composites parts of RIB boat with comparing the properties of hand lay-up process.

3. The evaluation of the physical properties and mechanical properties between VaRTM process and hand lay-up process

4. The adaption of the fabrication of RIB boat by using of VaRTM process.

In this experiment, we contrast strength between VaRTM and hand lay-up process. VaRTM process offers high quality the same as autoclave products, and applies with low cost like hand lay-up process. So, VaRTM process can practically apply for CFRP hull part of RIB boat.

VaRTM process can offer high quality and low cost. This paper shows that VaRTM process is one of the most suitable processes for composite part of CFRP boat.