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The most remarkable aspect of adhesion testing is to see where the break occurs. If the break is in the rubber, this is thought to be good, and poor if the break is at the surface of the reinforcement material because in that case the bonding system is the weak link. In peeling tests, a curve is acquired similar to the one with trouser tear tests and it is assessed in the same way, but the result is given in N/mm test width. Adhesion testing of car tires. (Photo: Gran Spetz) Evaluation of tear test and adhesion test ISO 6133. Shear modulus is mostly an essential property when calculating rubber products. The most typical way ฤทธิยะ ประถม ep to establish the value is to conduct measurements on a so called quadruple shear test piece. The quadruple shear test piece consists of four rubber pieces measuring 4 mm thick, 20 mm broad and 25 mm long, glued together or cured between two plates as in the figure. After mechanical conditioning, the test piece is elongated to 30% deformation with a speed of 5 mm/minute. The shear modulus is calculated at a deformation of 25%. Many rubber products are used under dynamic conditions and for that reason it is interesting to be able to measure dynamic properties.
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