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首页> 外文期刊>Journal of synchrotron radiation >In situ synchrotron wide-angle X-ray diffraction investigation of fatigue cracks in natural rubber
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In situ synchrotron wide-angle X-ray diffraction investigation of fatigue cracks in natural rubber

机译：天然橡胶疲劳裂纹的原位同步加速器广角X射线衍射研究

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摘要

Natural rubber exhibits remarkable mechanical fatigue properties usually attributed to strain-induced crystallization. To investigate this phenomenon, an original experimental set-up that couples synchrotron radiation with a homemade fatigue machine has been developed. Diffraction-pattern recording is synchronized with cyclic loading in order to obtain spatial distributions of crystallinity in the sample at prescribed times of the mechanical cycles. Then, real-time measurement of crystallinity is permitted during uninterrupted fatigue experiments. First results demonstrate the relevance of the method: the set-up is successfully used to measure the crystallinity distribution around a fatigue crack tip in a carbon black filled natural rubber for different loading conditions.
机译：天然橡胶表现出显着的机械疲劳性能，通常归因于应变诱导的结晶。为了研究这种现象，已经开发了将同步加速器辐射与自制疲劳机耦合的原始实验装置。衍射图样记录与循环加载同步，以便在机械循环的指定时间获得样品中结晶度的空间分布。然后，可以在不间断的疲劳实验中实时测量结晶度。最初的结果证明了该方法的相关性：该设置成功地用于测量炭黑填充天然橡胶在不同载荷条件下疲劳裂纹尖端周围的结晶度分布。

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