high closed porosiy cell PMI foam core for racing car spoiler

Car spoilers are generally used to increase the grip of the tires of high-speed vehicles to improve fuel efficiency. However, the spoiler will vibrate under the influence of the high-speed airflow brought by the driving of the vehicle, resulting in noise. Therefore, the rear spoiler of the car needs to be light in weight and have better shock absorption performance. PMI foam core sandwich composite material generally uses polymer foam quilt for the core layer, and heterogeneous materials on both sides of the skin, such as carbon fiber reinforced plastic and glass fiber reinforced plastic, which are composited by bonding. The sandwich layer composite material has the characteristics of light specific gravity and good shock absorption.

Therefore, in order to meet the requirements of light weight and shock absorption performance of the rear spoiler, a sandwich-layer composite spoiler was designed and developed using polymethacrylimide foam as the core material and carbon fiber reinforced composite material as the skin. The material is called a carbon fiber reinforced sandwich composite. In order to meet the requirements of light weight and shock absorption of automobile rear spoiler, this study applied polymethacrylimide foam material and CFRP sandwich composite material to the spoiler, and designed a structurally safe PMI foam core CFRP Sandwich composite spoiler.

Much lighter than conventional ABS/PC spoilers, the carbon fiber laminate design was derived using reverse engineering and finite element analysis. The PMI-FCCSC spoiler was 28.9% lighter than the ABS/PC spoiler when five-ply carbon fiber braid prepreg was used, 36.2% lighter when four-layer carbon fiber braid prepreg was used, and 36.2% lighter when three-layer carbon fiber braid prepreg was used When carbon fiber prepreg is used, it is 43.6% lighter.