Structural periodic lattices made of two or more dissimilar materials can be viewed conceptually in terms of a spectrum of structure types, bounded by stretch-dominated lattices of a single material at one end and tensegrities of tensile and compressive struts at the other. The present study probes the unexplored domain within this lattice-tensegrity spectrum with a focus on dissipative bi-material lattices. To begin, a primitive structural motif that exhibits the desired behavior is identified and its compressive response is analyzed. A 2D multi-cell lattice based on the primitive motif is designed and several material variants are fabricated and tested. Analysis of test results addresses effects of finite node dimensions, constraints on strut rotation at the nodes, free edges, and friction with the loading platens as well as limits dictated by rupture of tensile struts or buckling or yielding of compressive struts. The study culminates with guidelines on design of bi-material lattices with high strength and high straining capability.

从两种或多种不同材料制成的结构周期性晶格在概念上可以从一系列结构类型的角度来看，以单一材料的拉伸支配晶格为一端，而另一端为拉伸和压缩杆的张紧度。本研究以耗散双材料晶格为探针，探究了该晶格张力谱中的未探索区域。首先，确定表现出所需行为的原始结构基序，并分析其压缩响应。设计了基于原始图案的2D多单元晶格，并制造和测试了几种材料。对测试结果的分析解决了有限节点尺寸，节点上支柱旋转约束，自由边缘，以及与加载压板的摩擦力以及由于拉伸支柱的破裂或屈曲或压缩支柱的屈服所确定的极限。该研究最终以设计具有高强度和高应变能力的双材料晶格为准则。