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首页> 外文会议>ASME Pressure Vessels and Piping conference >THE RESIDUAL STRENGTH OF BREATHING AIR COMPOSITE CYLINDERS TOWARDS THE END OF THEIR SERVICE LIFE - A FIRST ASSESSMENT OF A REAL-LIFE SAMPLE
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THE RESIDUAL STRENGTH OF BREATHING AIR COMPOSITE CYLINDERS TOWARDS THE END OF THEIR SERVICE LIFE - A FIRST ASSESSMENT OF A REAL-LIFE SAMPLE

机译：在使用寿命结束之前呼吸空气复合气瓶的剩余强度-真实样品的首次评估

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Emergency response units increasingly use pressure cylinders made from fibre composites for breathing air as elements of personal protective equipment (PPE). Such applications expose the composite cylinders to harsh temperature and handling conditions. At least in Europe, standards have been used for certifying PPE, which are designed and mandatory for the approval of pressure receptacles for the transport of dangerous goods. Therefore, service conditions specific to PPEs are not accounted for in these standards. In this paper, BAM (Federal Institute for Materials Research and Testing) investigates the residual safety of a composite cylinder design at the end of their designated service life of 15 years. The cylinders (test pressure PH 450 bars; 6.8 Litres) are of one design type with aluminium liner and fully wrapped with carbon fibres, which is commonly considered a "Type Ⅲ" cylinder. All cylinders were used as PPE by the Berlin fire department and randomly picked in three samples of 25 cylinders each before tested. At BAM, the cylinder samples underwent hydraulic load cycle tests (LCT), conventional burst tests (BT) and so called slow burst tests (SBT). A concept for quantification of strength degradation already introduced by BAM was applied. This concept is based on a probabilistic assessment of the average strength and scatter of each sample of cylinders. The strength distributions of the used PPE-cylinders is shown and analysed. Some unexpected effects are shown and a refinement of the statistical assessment is introduced.
机译：应急响应单位越来越多地使用由纤维复合材料制成的压力瓶来呼吸空气，以此作为个人防护设备（PPE）的组成部分。这样的应用会使复合材料气瓶暴露在苛刻的温度和操作条件下。至少在欧洲，已经使用了PPE认证标准，这些标准是设计和强制性的，用于批准用于危险货物运输的压力容器。因此，这些标准未考虑专用于PPE的服务条件。在本文中，BAM（联邦材料研究与测试学院）研究了复合材料圆筒设计在指定的15年使用寿命结束时的剩余安全性。气瓶（测试压力PH 450巴; 6.8升）是一种设计类型，带有铝衬里并完全包裹有碳纤维，通常被认为是“Ⅲ类”气瓶。柏林消防局将所有钢瓶用作PPE，并在测试前从25个钢瓶中随机抽取了三个样本。在BAM，汽缸样品经过了液压负载循环测试（LCT），常规爆破测试（BT）和所谓的慢爆破测试（SBT）。应用了BAM已经引入的强度退化量化的概念。该概念基于对每个圆柱体样本的平均强度和散布的概率评估。显示并分析了使用过的PPE气瓶的强度分布。显示了一些意想不到的影响，并对统计评估进行了改进。

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