EXPERIMENTAL AND THEORETICAL STUDY IN RUBBER REINFORCED WITH CARBON FILLERS UNDER TENSION?CYCLIC LOAD

The main goal of this study is the selection of the best rubber reinforced with carbon black fillers stock to resist the tension, tear and crack growth due to cyclic stresses. The mechanical properties of this rubber is determined, the test specimens are prepared and manufactured in Babylon Tires Factory locate in Al-Najaf Al-Ashraf city in Iraq. In this work, the objectives are achieved experimentally about 80% and theoretically about 20%, the experimental works consisting tear and cyclic crack growth tests to find the crack growth length with number of cycles. The theoretical analysis is applied in special Paris law equations to calculate the crack growth length with number of cycle. The comparison between experimental and theoretical results of crack growth are determined and it is found that the maximum discrepancy in the results is about 14.28%.