ABSTRACT
This chapter presents minimum solid area (MSA) models for foams and honeycombs as well as mechanistic models for pores and microcracks. It compares models with data and examine their consistency, including showing similarities of porosity and microcrack models and behavior. The chapter demonstrates that a universal model is not feasible or suitable; families of models such as the MSA family are needed, as well as more attention to pore character, anisitropy. and heterogeneity. Three of four basic elastic properties are Young's (E), shear (G), and bulk (B) moduli; these reflect the ratios of an applied stress to the resultant elastic strain, respectively, from a uniaxial tensile or compressive stress, a shear stress, and a hydrostatic stress. Mechanistic modeling of mechanical properties is most extensive for elastic properties since these are most amenable to, but are still challenging, for rigorous mechanical analysis.
