Thin-walled lattice materials can be applied as energy absorbers in protective structures of civil defense. In this paper, quasi-static in-plane crushing tests were carried out to investigate the crushing behavior and energy absorption of buckling induced meta-lattice structures (BIMSs) with different central angles made of plastic iron material DT3 and formed by wire cutting technique. Three crushing patterns were revealed and analyzed. The test results clearly show that the initial peak force (IPF), the crushing force efficiency (CFE), the specific energy absorption (SEA) and the mean crushing force (MCF) can be substantially improved by introducing buckling pattern into the straight-walled lattice structure. The MCF of the BIMS was consistently predicted based on the simplified super folding element (SSFE) and the flattening element.

薄壁晶格材料可用作人防防护结构中的能量吸收剂。本文通过准静态面内压碎试验研究了以塑铁材料DT3为材料，采用线切割工艺成型的不同中心角屈曲诱导超晶格结构（BIMSs）的压碎行为和能量吸收。揭示并分析了三种破碎模式。测试结果清楚地表明，通过在直壁板中引入屈曲模式可以显着提高初始峰值力（IPF）、破碎力效率（CFE）、比能量吸收（SEA）和平均破碎力（MCF）。格子结构。基于简化的超级折叠单元（SSFE）和展平单元，一致地预测了 BIMS 的 MCF。