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首页> 外文期刊>International journal of materials & product technology >Failure prediction of glass/epoxy specimens using NOL ring test and acoustic emission technique
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Failure prediction of glass/epoxy specimens using NOL ring test and acoustic emission technique

机译：使用NOL环测试和声发射技术预测玻璃/环氧树脂样品的失效

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摘要

Methods have been evolved for the evaluation of filament wound composite structures making use of Naval Ordnance Laboratory (NOL) ring specimens. Internal pressure could be applied to the ring shaped specimens similar to hydro burst test of actual pressure vessels. In this investigation, suitable testing technique to estimate the tensile strength of NOL rings is presented. Also, in order to demonstrate the advantages of burst test, appropriate testing and evaluation of glass/epoxy rings under defect free as well as adverse conditions is carried out through acoustic emission (AH) monitoring. Thus, the degradation on the strength of glass/epoxy rings is understood through AE technique. Moreover, a mathematical approach is developed to predict the failure load of glass/epoxy rings at relatively lower load level itself with a reasonable error margin. Due to simplicity of this technique, a number of ring tests could be repeated easily as against the burst test of actual pressure vessels.
机译：已经开发出了利用海军军械实验室（NOL）环形标本评估细丝缠绕复合结构的方法。可以对环形样品施加内部压力，类似于对实际压力容器进行水力冲击试验。在这项研究中，提出了合适的测试技术来估算NOL环的拉伸强度。同样，为了证明爆破测试的优势，通过声发射（AH）监控对玻璃/环氧环在无缺陷以及不利条件下进行了适当的测试和评估。因此，通过AE技术可以理解玻璃/环氧环强度的降低。此外，开发了一种数学方法来预测玻璃/环氧树脂环本身在较低负载水平下的故障负载，并具有合理的误差范围。由于该技术的简单性，与实际压力容器的爆破测试相比，可以轻松地重复进行许多环形测试。

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