Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

Table 3

3DP fractured rock specimens.

No.	Specimen	Specimen materials and test conditions	Test results	Relevant mechanical parameters	Comments	Sources
1		Photosensitive resin		Dynamic compressive stress and strain, longitudinal wave velocity, elastic modulus, etc.	Symmetrical wing cracks initiated	[86]
		Dynamic loading			The specimen cannot completely reflect the mechanical behavior of brittle rocks
2		Photosensitive resin		Compressive strength and axial strain at the peak stress influenced by the flaw number and angles.	Wing and antiwing cracks wrapped around the flaw edge	[87]
					The maximum crack propagation velocity in single flawed specimens is higher than that in double flawed specimens
		Static uniaxial compression
3		Gypsum-like material		Dynamic compressive stress and strain, longitudinal wave velocity, elastic modulus, etc.	The 3DP technique could prepare specimens with preset cracks	[40]
					The failure patterns of gypsum-like specimens are close to the rock mechanical tests
		Dynamic loading
4		Gypsum-like material		Young’s modulus, Poisson’s ratio, uniaxial compressive strength, tensile strength.	3D printed rock-like Brazilian discs with preexisting flaws were investigated	[82–84]
		Brazilian tests			The 3DP technology combined with DIC method shows the superiority in the laboratory test