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Effect of weldline on fatigue life of natural rubber parts

机译：焊缝对天然橡胶件疲劳寿命的影响

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The presence of weldline in rubber products is regarded as a one of the most undesirable phenomena, since it result in poor mechanical properties. Designers typically minimize the influence of weldlines by their placement in non-critical areas and the application of a factor of safety based on design specifications and anticipated failure modes. Such practice results in over-design of parts, since the factor of safety is generally independent of the material. Truly cost-effective part design requires a better understanding of the behavior of polymers under different loads and failure conditions. A large amount of literatures have been published in regard to the effects of weldlines on the static mechanical properties of thermoplastics and thermoplastic composites. In the present study, the effect of weldline on the fatigue life of natural rubber was first investigated with regarding to the filler types and contents. The use of design data which takes into account the weldline formation as well as the filler loading will enable design engineers to more accurately predict the performance of rubber molded part under fluctuating load.
机译：橡胶制品中焊接线的存在被认为是最不期望的现象之一，因为它导致机械性能差。设计人员通常在非关键领域的放置和基于设计规格和预期的故障模式的应用程序的应用最小化焊接线的影响。这种实践导致零件的过度设计，因为安全系数通常与材料无关。真正经济高效的部件设计需要更好地了解不同载荷和失效条件下聚合物的行为。关于焊接线对热塑性塑料和热塑性复合材料的静态力学性能的影响，已经公布了大量文献。在本研究中，首先对填料类型和内容物研究了焊缝对天然橡胶疲劳寿命的影响。使用设计数据考虑到焊接线形成以及填充物装载将使设计工程师能够更准确地预测在波动负载下的橡胶模塑部件的性能。

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