具有可剪裁能量吸收的结构链格
Architectured Chain Lattices with Tailorable Energy Absorption in Tension
摘要：
本文介绍了链格，一个层次的桁架结构，包括两个相互贯穿的晶格。一种晶格使材料变韧并防止灾难性的局部失效，而另一种晶格用作多孔基质，其在拉伸载荷期间致密化以吸收能量。链格适用于增材制造，可以将通常易碎且对材料敏感的3D打印材料转化为耐损伤材料。计算预测陶瓷链晶格可以具有比其完全致密的对应物大几个数量级的特定能量吸收。
英文摘要：
This paper introduces the chain lattice, a hierarchical truss structure comprising two interpenetrating lattices. One lattice toughens the material and prevents catastrophic localized failure while the other lattice serves as a porous matrix that densifies to absorb energy during tensile loading. Chain lattices are amenable to additive manufacturing and can transform 3D-printable materials that are normally brittle and flaw-sensitive into damage-tolerant materials. Calculations predict ceramic chain lattices can have a specific energy absorption several orders of magnitude greater than that of their fully dense counterparts.
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