A Novel Method for Dynamic Short-Beam Shear Testing of 3D Woven Composites

The rate-dependent fracture toughness of silicon carbide- and boron carbide-based ceramics

“…A modified split-Hopkinson pressure bar apparatus was used to perform high loading-rate fracture toughness tests [39,41,42]. This apparatus consisted of three major components: a single-stage gas gun, a 6.35 mm diameter incident bar, and a rigid anvil to support the load cell and a four-point bend fixture.…”

“…This apparatus consisted of three major components: a single-stage gas gun, a 6.35 mm diameter incident bar, and a rigid anvil to support the load cell and a four-point bend fixture. On the incident bar, there is a momentum trap assembly (consisting of a flange, sleeve, and rigid mass) [39,41,43] at the striker-end and an aluminum bend fixture at the other end, which has four loading points for the flexure tests. All of the bars were made of maraging steel (VascoMax C-350).…”

“…5. A similar test procedure was adopted by Walter et al to determine the inter-laminar shear strength (ILSS) of composite specimens [41].…”

“…6(a)), which are located far away from the notch area. The specimen was assumed to be fully elastic, which removes any rate dependence for the material and focuses on the wave mechanics of the system [41]. The loader and support were modeled as rigid bodies while the specimen was modeled using approximately 50,000 four-node plane strain elements (CPE4R).…”

Poly(ether ether ketone)-Grafted Graphene Oxide “Interconnects” Enhance Mechanical, Dynamic Mechanical, and Flame-Retardant Properties in Epoxy Laminates

“…38 There are various methods to determine the ILSS, of which the better approach is by the short beam shear test (ASTM D 2344) due to its simplicity. 39 The shear stress is independent of the support length because of the small sample size. The test fixture consisted of a loading cylindrical roller of 6.0 mm diameter and a side support of 3.4 mm diameter.…”