Cone calorimeter and controlled atmosphere cone calorimeter experiments were conducted on various samples. The intent of the tests was to examine the behavior of uniform and composite samples in a range of thicknesses, irradiances, and oxygen concentrations. Single, uniform layers of acrylonitrile butadiene styrene (ABS) were compared to a composite mix, comprising of ABS with a surface layer of cardboard and a secondary layer of polyethylene bubble wrap (intended to represent a potential storage arrangement). The horizontal samples have been tested at irradiances of 25 and 50 kW/m² and oxygen concentrations of 20.95%, 17%, and 15% to examine a range of significant variables. Results for the uniform arrangement indicated various correlations, previously observed in the works of others, such as the relationships typically described between applied heat flux, ignitability, heat release rate and the effect of the introduction of hypoxic conditions. However, results were shown to change significantly when samples were arranged to feature composite layers. A hypothesized cause of the behavioral change, namely the soot and char residual introduced from the incomplete combustion of the cardboard layer, highlights further important variables that require consideration in material testing under hypoxic conditions. Such variables, namely specific material behaviors and sample orientation, must be sufficiently captured in the design methodologies of systems reliant upon the introduction of hypoxic conditions. It is concluded that sufficiently capturing a wider range of variables in burning materials under hypoxic conditions will introduce further design resilience and help optimize fire protection/prevention methods.

中文翻译：

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低氧环境中的燃烧材料行为：一项实验研究，检查作为复合系统的丙烯腈丁二烯苯乙烯、聚乙烯泡沫包装和纸板层的代表性存​​储布置

锥形量热仪和可控气氛锥形量热仪实验对各种样品进行。测试的目的是检查在不同厚度、辐照度和氧气浓度范围内的均匀和复合样品的行为。将单层均匀的丙烯腈丁二烯苯乙烯 (ABS) 与复合混合物进行了比较，复合混合物由 ABS 和纸板表面层和第二层聚乙烯气泡膜（旨在代表潜在的存储布置）组成。水平样品已在 25 和 50 kW/m ^{2 的}辐照度下进行测试和氧气浓度 20.95%、17% 和 15%，以检查一系列重要变量。均匀排列的结果表明了之前在其他人的工作中观察到的各种相关性，例如在施加的热通量、可燃性、热释放率和引入缺氧条件的影响之间通常描述的关系。然而，当样品排列成复合层时，结果显示出显着变化。行为变化的一个假设原因，即纸板层不完全燃烧引入的烟灰和炭残留，突出了在缺氧条件下进行材料测试时需要考虑的其他重要变量。这些变量，即特定的材料行为和样品方向，必须在依赖于引入缺氧条件的系统的设计方法中充分体现。结论是，在缺氧条件下充分捕捉燃烧材料中更广泛的变量将引入进一步的设计弹性并有助于优化防火/预防方法。