Caustics analysis of the crack initiation and propagation of graded materials

Experimental investigation on the radial and circular crack propagation of PVB laminated glass subject to dynamic out-of-plane loading

“…The dynamic crack propagation (along the material distribution axis) in homogeneous and inhomogeneous materials is thoroughly studied [15][16][17][18][19][20][21][22][23][24][25][26][27]. Singh et al [18] have investigated the fracture behavior of a dynamically loaded edge crack in a brittle-ductile layered material.…”

Study on dynamic fracture behavior of TA15ELI alloy under mode-II loading by caustics method

“…1(b), the specimens were loaded under a drop hammer at room temperature. The height of the drop hammer is 1 m, which could produce a load rate ( K  ) in a magnitude of 3 5 1 / 2 1 10 10 MPa m s K…”

“…The optical method of caustics, which has been first established by Manogg in 1964 and then developed by Kalthoff, has been proven to be an efficient and effective method [4][5] for the study of dynamic fracture problems. The principle of caustics method is as follows [6]: the parallel rays illuminate normally on a cracked specimen.…”

Improvement of Mechanical Properties in the Functionally Graded Aluminum Matrix Nanocomposites Fabricated via a Novel Multistep Friction Stir Processing

“…It has been shown that the FGMs with a crack oriented toward the more compliant material experienced a lower effective stress intensity factor, resulting in the crack tip shielding and higher crack resistance, compared with a cracked homogeneous material under the same condition. [38] It is also known that the larger crack-tip deformation zone yields more dissipation of energy imposed by the external loads, which contributes superior fracture toughness and fracture energy to the material. [36,39] In conclusion, resultant fracture behavior of FGMs is dictated by the combination of these intrinsic and extrinsic fracture mechanisms which may increase the remnant strength of a cracked material.…”