دانلود مقاله ترجمه شده مشخصه یابی رفتار شکست الاستومرها تحت شرایط بارگذاری ترکیبی

In engineering applications elastomers are frequently exposed to complex combinations of mechanical loads (monotonic, static, intermittent and cyclic loads) superimposed by various environmental effects. A better understanding of the material resistance against crack initiation and propagation becomes of increasing practical importance, which can be illustrated by the example of the rapid gas decompression failure behavior of pressurized seals for oilfield applications. Modern experimental methods and techniques provide novel opportunities to better understand the deformation and failure behaviour of materials under complex loading conditions. Hence, experiments were performed on both component level under near service loading conditions and on laboratory test specimen level using various specimen configurations for two model elastomers. The results are summarized as the kinetics of the loading and the material response. Special emphasis was devoted to the observation and the adequate characterization of the crack initiation and crack growth process by fracture mechanics parameters