Aerogels in Aerospace: An Overview

Table 3

Mechanical studies on silica aerogel.

Methodology	Author	Analysis	Approach/apparatus
Experimental	Arvidson and Scull [111]	Young’s modulus, proportional limit, and yield strength	A concentric, overlapping-cylinder, capacitance extensometer is used to measure the strain
	Gronauer et al. [112]	Young’s modulus	Sound velocity measurements
	Woignier and Phalippou [113]	Young’s modulus, fracture strength, and toughness	Three-point flexural and three-point bending
	Gross et al. [114]	Young’s modulus and Poisson’s ratio	Ultrasonic and static compression
	Scherer et al. [115]	Bulk modulus	Mercury porosimetry
	Parmenter and Milstein [89]	Hardness, compression, tension and shear on unreinforced and fiber-reinforced aerogels	Vickers and Knoop hardness test, four-point bending, and a displacement-controlled Instron 1123 testing machine
	Stark et al. [116]	Young’s modulus	Atomic force microscopy
	Moner-Girona et al. [117]	Hardness, Young’s modulus, and elastic parameter	Microindentation measurements using a Nanotest 550 Indenter
	Martin et al. [118]	Young’s Modulus	Uniaxial compression and acoustic velocity
	Perin et al. [119]	Elastic modulus and internal friction	Isostatic compression
	Miner et al. [120]	Young’s modulus and nonrecoverable strain for hygroscopic silica aerogel	Low-range compression tester
	Despetis et al. [121]	Subcritical growth domain in hydrophilic silica aerogel	Double-cleavage-drilled-compression test (DCDC)
	Takahashi et al. [122]	Bending strength	Three-point bending
Numerical	Yang et al. [123]	Creep behavior of ceramic fiber-reinforced silica aerogel	Scanning electron microscope
	Hasmy et al. [124]	Wave-vector-dependent scattered intensity	Cubic DLCA fractal structure model
	Rahmani et al. [125]	Densities of states and dynamic structure factors	3D cubic DLCA fractal structure model
	Yang et al. [123]	Creep behavior of ceramic fiber-reinforced silica aerogel	Power-law creep model