The purpose of this study is to evaluate and compare the ability of various composite structures to dissipate the energy generated during a crash. To this end, circular composite tubes were tested in compression in order to identify their behavior and determine their absorbing capabilities using the specific energy absorption (energy absorbed per unit weight). Several composite tubular structures with different materials and architectures were tested, including hybrid composition of carbon–aramid and hybrid configuration of 0/90 UD with woven or braided fabric. Several inventive and experimental trigger systems have been tested to try and enhance the absorption capabilities of the tested structures. Specific energy absorption values up to 140 kJ.kg−1 were obtained, achieving better than most instances from the literature, reaching around 80 kJ.kg−1. Specimens with 0°-oriented fibers coincidental with the direction of compression reached the highest specific energy absorption values while those with no fiber oriented in this direction performed poorly. Moreover, it has consequently been established that in quasi-static loading, a unidirectional laminate oriented at 0° and stabilized by woven plies strongly meets the expectations in terms of energy dissipation. Incidentally, an inner constrained containment is more effective in most cases, reducing the initial peak load without drastically reducing the specific energy absorption value.

中文翻译：

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复合薄壁圆管在不同触发起爆轴向挤压下的吸能能力

本研究的目的是评估和比较各种复合结构消散碰撞过程中产生的能量的能力。为此，圆形复合管在压缩中进行了测试，以确定它们的行为并使用特定的能量吸收（每单位重量吸收的能量）来确定它们的吸收能力。测试了几种具有不同材料和结构的复合管状结构，包括碳-芳纶的混合成分和 0/90 UD 与机织或编织织物的混合配置。已经测试了几种创造性和实验性的触发系统以尝试和增强测试结构的吸收能力。获得了高达 140 kJ.kg-1 的比能量吸收值，比文献中的大多数情况更好，达到约 80 kJ。公斤-1。0°取向纤维与压缩方向一致的试样达到了最高的比能量吸收值，而没有纤维取向的试样则表现不佳。此外，因此已经确定，在准静态载荷下，定向为 0° 并由编织层稳定的单向层压板在能量耗散方面强烈满足预期。顺便提一下，在大多数情况下，内部约束容器更有效，可以减少初始峰值负载，而不会大幅降低比能量吸收值。因此已经确定，在准静态加载中，定向为 0° 并由编织层稳定的单向层压板在能量耗散方面非常符合预期。顺便提一下，在大多数情况下，内部约束容器更有效，可以减少初始峰值负载，而不会大幅降低比能量吸收值。因此已经确定，在准静态加载中，定向为 0° 并由编织层稳定的单向层压板在能量耗散方面非常符合预期。顺便提一下，在大多数情况下，内部约束容器更有效，可以减少初始峰值负载，而不会大幅降低比能量吸收值。