Abstract Measurement of weak non-linear response of Kevlar® fibre damaged by UV exposure
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Measurement of weak non-linear response of Kevlar® fibre damaged by UV exposure

机译：测量因紫外线照射而损坏的Kevlar®纤维的弱非线性响应

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AbstractThis paper deals with a high-sensitivity method for the assessment of damage in high-strength fibres exposed to UV radiation. A recently developed experimental testing machine, based on an optical measurement system and electro-magnetic driving force, was used to characterize fibre materials. Stiffness, damping, and non-linearity were measured on several Kevlar® fibre samples previously exposed to UV light for different lengths of time. The results show that UV radiation increases the material non-linearity by amounts which can be clearly observed even at low vibration amplitudes. On the contrary, uncertainties affecting the determination of stiffness and damping with the adopted approach don’t seem to allow a similarly unambiguous UV damage assessment.Result confirm our initial hypothesis that non-linearity may be a valuable index of damage, at least in case of UV exposure, for applications in the Structural Health Monitoring (SHM) field.
机译： 摘要 本文介绍了一种高灵敏度方法，用于评估暴露于紫外线辐射的高强度纤维的损伤。基于光学测量系统和电磁驱动力的最新开发的实验测试机用于表征纤维材料。在几个Kevlar®纤维样品上测量了刚度，阻尼和非线性度，这些样品先前暴露于紫外线下的时间不同。结果表明，紫外线辐射增加了材料的非线性程度，即使在低振动幅度下也可以清楚地观察到。相反，采用所采用的方法影响刚度和阻尼确定的不确定因素似乎无法进行类似的明确的紫外线损伤评估。 结果证实了我们最初的假设，即对于结构健康监测（SHM）领域的应用，非线性至少在紫外线照射下可能是有价值的破坏指标。 < / ce：abstract-sec>

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