경량 알루미늄 2겹 복합소재의 진동내구 특성 평가

The heat protector is part applied to the engine and under body to block the heat. Recently, heat protector has demanded to lightweight and high NVH performance like heat shield and vibration reduction. To meet requirements, material of heat protector part is changed to aluminum from SACD material. Also heat protector part is applying to composite panel made by two aluminum sheet. Composite panel made by two aluminum sheet has high performance in the heat shield and noise vibration reduction. However It is highly vulnerable to vibration from joint assembly with car body. So, we developed aluminum two composite panel has air pocket in the between sheet. also evaluated on the vibration fatigue for composite panel. Result of vibration fatigue performance test was used to concluding.