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Study on the effect of molecular chain structure on the fracture mechanical properties of aviation polymethylmethacrylate by extended digital image correlation method

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Document pages: 8 pages

Abstract: The main purpose of this study is to study the fracture mechanical properties of aviation polymethylmethacrylate after directional tensile treatment. Due to the special processing of oriented polymethylmethacrylate, the molecular chain structures in different directions are different. The mechanical properties depend on the specific molecular chain structure. We measured the displacement field near the crack tip when the crack propagated in different directions in directional polymethylmethacrylate by using the extended digital image correlation method. Then, we tested the critical load of different samples and analyzed the fracture morphology of different samples. According to the experimental results, the molecular chain model of directional polymethylation was establishedethacrylate could be established. The analysis results using the molecular chain model are consistent with the experiments, which confirms the reliability of the molecular chain model.

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