Since the carbon fiber has a high strength, low density, very low X-ray absorption characteristics, in medical radiology equipment, the use of carbon fiber composite material of the panel, an intermediate 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, in many deck requires a suitable aluminum equivalent, it is also required to have excellent rigidity and strength to ensure that the medical bed deformation at work sufficiently small. Carbon fiber is an anisotropic material and the foam core layer also with a carbon fiber composite material performance of the panel surface is inconsistent, so in the design of medical beds, we can not simply load deformation FORMULA isotropic material to simulate medical bed deformation of this complex structure.

"Sandwich" structure there is a critical point concentrated load. When the deformation concentrated load does not exceed the critical point, you can use DIAB classic "sandwich" structure deformation theory to explain. In the critical point load and deformation substantially linear.

Although the results of theoretical calculations than the measured results to be big, but the critical point before the load - deformation curve slope similar to that from the side confirmed the accuracy of the structural deformation calculating formula of "sandwich" DIAB classic. Use this formula to design foam sandwich structures are reliable medical bed, also have a certain margin of safety protection.

As a typical foam sandwich structure of medical beds, also there must be a critical point concentrated load. And because reliability wearing platinum formula, we calculated a theoretical simple conclusion: concentrated load deformation medical bed shear, bending result of the role, which is a small sample to shear deformation in a great distinction.