Appearance Quality: The appearance quality of the fender is inspected visually. Requirements: The fender surface should be uniform in texture, free from impurities, bubbles, cracks, visible scars, and missing adhesive, which would affect performance. Exposed steel plates are not permitted.
Tensile Test: The specimen is symmetrically clamped on the upper and lower grips of the tensile testing machine and stretched at a rate of (500±50) mm/min. Record the force and elongation required during continuous stretching and at breakage as required.
Fender Mechanical Performance Test: The fender is fixed to the base plate of the testing machine according to the compression direction, and the standard height of the fender is verified. The testing machine is turned on, and the fender is compressed at a rate of (70±5) mm/min to 10%, 20%, 30%,... up to the designed compression deformation amount. The pressure value corresponding to each compression amount is recorded. The compression is repeated twice at 30-minute intervals. The average of the last two data points is used to plot the reaction force-deformation curve. The energy absorption is then calculated based on the reaction force-deformation curve.
Compression permanent deformation test: Under standard laboratory temperature, a specimen of known height is compressed to a specified height according to the required compression ratio. The compression is carried out for a certain time under standard laboratory temperature or high temperature conditions. Then, the compression is removed under a certain temperature condition, and the specimen is allowed to recover in a free state for a specified time. The height of the specimen is then measured.