The effect of varying temperature on the compressive properties of a Nomex honeycomb core reinforced with small diameter composite tubes and rods has been investigated experimentally. Compression tests have been undertaken on a commercially-available Nomex core reinforced with tubes or rods at temperatures between 20 and 140 °C. Tests were also undertaken on unreinforced Nomex cores in order to assess the benefits associated with localized reinforcement of the core. Compression tests on the unreinforced cores have shown that the strength decreased steadily with increasing temperature, passing from 4.8 MPa at room temperature to 3.8 MPa at 140 °C. Similarly, the specific energy absorption (SEA) of the plain core samples decreased slightly from 22.3 to 18.9 kJ/kg over this range of temperatures. Reinforcing the cores with either rods or tubes had a positive effect on the compressive properties of the cores over the range of temperatures considered. For example, the room temperature compression strengths of the rod reinforced cores were 70% higher those of the plain core. Similarly, at 140°C, the rod-reinforced systems were 20% stronger than the plain core. Finally, the energy-absorbing capacity of the tube reinforced cores was higher than that of the rod-reinforced cores.

中文翻译：

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在高温下对增强型 Nomex 蜂窝进行压缩测试

已经通过实验研究了不同温度对用小直径复合管和棒增强的 Nomex 蜂窝芯的压缩性能的影响。已在 20 至 140 °C 的温度下对用管或棒加固的市售 Nomex 芯材进行了压缩测试。还对未增强的 Nomex 核心进行了测试，以评估与核心局部增强相关的好处。对未增强芯材的压缩测试表明，强度随着温度的升高而稳步下降，从室温的 4.8 MPa 到 140°C 的 3.8 MPa。同样，在这个温度范围内，普通岩心样品的比能量吸收 (SEA) 从 22.3 kJ/kg 略微下降到 18.9 kJ/kg。在所考虑的温度范围内，用杆或管加强芯对芯的压缩特性具有积极影响。例如，杆加强芯的室温抗压强度比普通芯高 70%。类似地，在 140°C 时，杆增强系统比普通核心强 20%。最后，管加强芯的吸能能力高于杆加强芯。