|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Designing additive layered manufacturing inspired damage tolerant architectures
||Deepesh Yadav, Tanmayee More, B N Jaya
|On-Site Speaker (Planned)
Thermal spray is a form of additive manufacturing of materials in which porosities occur due to gas entrapment or inter-splat cracks. The effect of porosity and its distribution (in terms of size, morphology, location) as inspired by thermal spray coating microstructures, on damage tolerance has been investigated. Globular and ellipsoidal features were micro-machined in a brittle Poly(methyl methacrylate) polymer, with the objective to optimize the size and arrangements of features for best damage tolerance. Damage tolerance was determined in terms of work of fracture under three-point bend loading. The energy release rate around the features was calculated using micro-mechanics-based numerical modeling for different sizes and arrangements. Rate of increase in energy release rate is more in globular-like feature than ellipsoidal feature. Globular features gave better damage tolerance in terms of initiation fracture toughness compare to ellipsoidal, but ellipsoidal offered more resistance to crack propagation and better overall damage tolerance.
||Mechanical Properties, Other, Other