Mixed-mode, high-cycle fatigue-crack growth thresholds are reported for through-thickness cracks (large compared to microstructural dimensions) in a Ti±6Al±4V turbine blade alloy with a bimodal microstructure. Speci®cally, the e€ect of combined mode I and mode II loading, over a range of phase angles b ˆ tanÿ1…DKII=DKI† from 0° to 82° …DKII=DKI 0±7), is examined for load ratios (ratio of minimu...

Additive manufacturing (AM) is a topical field today and has received the attention of many researchers. However, further research needed to overcome challenges facing AM, especially in mixed-mode fracture. The results presented this paper are framing experimental data obtained for I/II fracture properties laser sintered polyamide. experiment was carried out on Semi-Circular Bend (SCB) specimen...

We study the construction of D–brane boundary states in the pure spinor formalism for the quantisation of the superstring. This is achieved both via a direct analysis of the definition of D–brane boundary states in the pure spinor conformal field theory, as well as via comparison between standard RNS and pure spinor descriptions of the superstring. Regarding the map between RNS and pure spinor ...

A mixed-mode I/II fracture criterion for predicting the response of composite materials is proposed. This derived based on a comprehensive study and consideration physics onset. The phenomenon that causes various damage mechanisms at vicinity crack tip examined. It elucidated stress distribution ought to be defined using reinforcement isotropic solid (RIS) state. new criterion, which called Imp...