A carregar...
Publicação
Hot forming thermal cycle and material exposure effect on prepreg materials properties
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 13.43 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Since its first use on Edison’s incandescent lamp, carbon fiber has been studied and
developed into an important resource in industry. This material is used in many forms
but mainly in fiber rolls or tapes and is usually impregnated with resin (prepregs). As
such, using ATL (Automated Tape Layup), AFP (Automatic Fiber Placement) or Hand
Layup, these are laminated in molds and then may go through hot forming process and/or autoclave process curing. As this material has a time interval which can be used until it degrades its mechanical and processability properties, since the curing process starts when the CFRP is impregnated and the curing process never ceases. Hot forming is being focused since temperature is a major factor for curing speed. Therefore, a test proposal was made to evaluate the effect of hot forming thermal cycle and material exposure in the characteristic and function of the cured laminates. The work developed in this thesis should clear out that ATL material is not suited for exposure conditions while AFP material is capable of tolerate the exposure conditions proposed and be processed through hot forming.
Descrição
Palavras-chave
hot forming carbon fiber exposure conditions aeronautics prepregs ageing