An Experimental Study to Evaluate the Mechanical Properties and Durability of Frozen Car Body Walls Using Composite Polyester - Fiberglass with Sandwich Structure

This paper focuses on presenting the results obtained from theoretical calculations, practical tests, and simulations. The calculations using mathematical models have been published in related documents. The process is performed according to this sequence: structures analyzing, selecting mathematical models, and proceeding with Matlab software. Verifying studies are conducted by experimental methods of the above factors. Random sampling, testing, empirical analysis of results. Mechanical behavior including bending, tension, and bending deformation of the wall structure is achieved through simulation. The results obtained show a good correlation between the calculated and determined by experiment and simulation. Specifically, the wall strength parameters of tensile stresses are 93.05 MPa for calculation and 99.73 MPa for experiments, similar, the elastic modulus is 1769.4 MPa and 2830.33 MPa, respectively. The compressive stress is 2.54 MPa and the bending strain obtained from the calculation is 19.51mm. In this paper, the author has calculated the tensile stress σk, compressive stress σn, elastic modulus E, and bending strain ∆. At the same time, the general formula for such factors is also given to help enterprises be more flexible in changing and modifying components to suit the requirements of the given durability.