Prediction of ductile fracture initiation for powder metallurgical aluminum-copper preforms using FEM

Application of the GTN Model in Ductile Fracture Prediction of 7075-T651 Aluminum Alloy

In this paper the capability of Gurson-Tvergaard-Needleman (GTN) model in the prediction of ductile damage in 7075-T651 aluminum alloy is investigated. For this purpose, three types of specimens were tested: Standard tensile bars, Round notched bar (RNB) specimens and compact tension (C(T)) specimens. Standard tensile bar tests were used to obtain the mechanical properties of the material and t...

prediction of forming limit curve using ductile fracture criteria in hydrofoming of aluminum tubes

forming limit curve (flc) is an important tool for evaluation of formability of sheet metals subjected to different loading. free bulge of aluminume tubes has been investigated numerically to obtain flc. to verify the numerical results one experimental setup has been manufactured which has the ability of controlling the internal pressure and axial feed. in this study, time and zone of bursting ...

NASA Technical Paper 1086 Metallurgical Characterization of the Fracture of Several High Strength Aluminum Alloys

Surface Treatment of Powder Metallurgical Compacts

Introduction Powder metallurgy (p/M) is a rapidly expanding technology for manufacturing of structural parts. The PA4 process provides economical as well as technical benefits over conventional processing of wrought material. It is possible to fabricate high quality, complex parts to close tolerances without machining. The energy consumption is low and the material utilisation and productivity ...

Prediction of forming limit curves (FLD, MSFLD and FLSD) and necking time for SS304L sheet using finite element method and ductile fracture criteria

Forming limit curves are used as a parameter in finite element analysis to control the material's level of formability. In this research, forming limit diagram (FLD) of SS304L sheet was obtained by ABAQUSfinite element software. In practice, the experimental determination of a forming limit curve is a very time-consuming procedure which requires special and expensive equipment. Forming limit di...