Since the carbon fiber has a high strength, low density, low X-ray absorption characteristics, in medical radiology equipment, the use of carbon fiber composite material as the panel, in the middle of the foam sandwich "sandwich" structure as supporting a patient and radiopaque deck, the X-ray transmission performance, image clarity, strength and stiffness were significantly better than polycarbonate, phenolic resin panels and other traditional deck to improve overall performance of equipment plays an important role. Therefore, the medical device manufacturers have been gradually replaced traditional materials bed panels, sandwich structure of the carbon fiber composite panels have broad market prospects and development in the medical device field.

To ensure medical accuracy requirements of many deck in a suitable aluminum equivalent, it is also required to have excellent rigidity and strength to ensure that medical bed deformation at work sufficiently small. Carbon fiber is an anisotropic material and the foam core layer and also the performance of carbon fiber composite panel surface is inconsistent, so the design of medical beds, we can not simply load deformation FORMULA isotropic material to simulate this deformation medical bed complex structure.

This study focuses on the theory of foam core structure of the carbon fiber composite material measured load deformation and deformation load is compared to the development of medical deck provide a theoretical basis.

Foam sandwich structure of the carbon fiber composite material testing and material selection program

1 pilot program

Development of foam sandwich structure, the upper and lower surfaces of the carbon fiber composite panels, the middle of the foam core, the "sandwich" structure.

Test program: the use of carbon fiber / epoxy prepreg, according to the prepreg plies paving design, and after curing with a combination of foam core, using simple metal mold thermoforming.

Molding process: preparing a mold prepreg Stones cut a prepreg with a foam core in combination thermoforming.

2 material selection

Prepreg specification used was 150 g / m; carbon fiber Toray T700, temperature curing systems, the curing process is simple. 

Foam core selection ROHACELL 51IG-F foam, the foam has good mechanical properties, and the advantages of 100% closed cell.