The energy-absorbing response of sandwich structures with exceptionally high levels of energy absorption is investigated. The sandwich panels are produced by fixing small composite tubes onto metal facings with surface features that reflect the internal geometry of the tubing. Small diameter tubes are employed to manufacture the cores, since it is well established that the specific energy absorption (SEA) characteristics of a composite tube increase as the inner dimension (diameter or wall-to-wall) to thickness ratio decreases. Tests have been undertaken on tubular arrays based on both circular and square composite tubes. The effect of varying the areal density of the tubular array within the core was investigated by systematically increasing the number of tubes from one to nine. An examination of the composites during the crushing process indicated that all of the tubes failed in a splaying process, involving significant fracturing of fibers and longitudinal splitting. The measured values of SEA remained relatively constant in most cases as the areal density of the tubular arrangement was increased, suggesting that cores could readily be designed to absorb known levels of applied external energy. Arrays based on circular tubes offered higher energy-absorbing characteristics than their square counterparts, with values in excess of 100 kJ/kg being recorded in some cases. It is believed that these tubular sandwich structures offer potential for use in components that are subjected to extreme dynamic loading, such as those associated with impact and blast.

研究了具有极高能量吸收水平的夹层结构的能量吸收响应。夹心板是通过将小型复合管固定到金属饰面上而制成的，金属饰面具有反映管材内部几何形状的表面特征。使用小直径管来制造芯，因为众所周知，复合管的比能量吸收 (SEA) 特性随着内部尺寸（直径或壁对壁）与厚度之比的减小而增加。已经对基于圆形和方形复合管的管状阵列进行了测试。通过系统地将管的数量从 1 增加到 9，研究了改变核心内管阵列的面密度的影响。在压碎过程中对复合材料的检查表明，所有管子都在展开过程中失败，包括纤维的显着断裂和纵向分裂。在大多数情况下，随着管状布置的面密度增加，SEA 的测量值保持相对恒定，这表明可以很容易地设计核心以吸收已知水平的外加能量。基于圆管的阵列比方形阵列提供更高的能量吸收特性，在某些情况下记录的值超过 100 kJ/kg。据信，这些管状夹层结构可用于承受极端动态载荷的部件，例如与冲击和爆炸相关的部件。包括显着的纤维断裂和纵向分裂。在大多数情况下，随着管状布置的面密度增加，SEA 的测量值保持相对恒定，这表明可以很容易地设计核心以吸收已知水平的外加能量。基于圆管的阵列比方形阵列提供更高的能量吸收特性，在某些情况下记录的值超过 100 kJ/kg。据信，这些管状夹层结构可用于承受极端动态载荷的部件，例如与冲击和爆炸相关的部件。包括显着的纤维断裂和纵向分裂。在大多数情况下，随着管状布置的面密度增加，SEA 的测量值保持相对恒定，这表明可以很容易地设计核心以吸收已知水平的外加能量。基于圆管的阵列比方形阵列提供更高的能量吸收特性，在某些情况下记录的值超过 100 kJ/kg。据信，这些管状夹层结构可用于承受极端动态载荷的部件，例如与冲击和爆炸相关的部件。这表明核心可以很容易地设计成吸收已知水平的外部能量。基于圆管的阵列比方形阵列提供更高的能量吸收特性，在某些情况下记录的值超过 100 kJ/kg。据信，这些管状夹层结构可用于承受极端动态载荷的部件，例如与冲击和爆炸相关的部件。这表明核心可以很容易地设计成吸收已知水平的外部能量。基于圆管的阵列比方形阵列提供更高的能量吸收特性，在某些情况下记录的值超过 100 kJ/kg。据信，这些管状夹层结构可用于承受极端动态载荷的部件，例如与冲击和爆炸相关的部件。