Modeling of The Semi-Solid Material Behaviour and Analysis of Micro-/Mesoscale Feature Forming  

Oleh:

Kim, Gap-Yong ; Koc, Muammer ; Mayor, Rhet ; Jun, Ni

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Manufacturing Science and Engineering vol. 129 no. 2 (2007), page 237-245.
Topik: FEATURE; semi - solid; material behaviour; micro- / meso scale; feature forming

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ93.9 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

One of the major challenges in simulation of semi - solid forming is characterizing the complex behavior of a material that consists of both solid and liquid phases. In this study, a material model for an A356 alloy in a semi - solid state has been developed for high solid fractions (> 0.6) and implemented into a finite element simulation tool to investigate the micro - / mesoscale feature formation during the forming process. Compared to previous stress models, which are limited to expressing the stress dependency on only the strain rate and the temperature (or the solid fraction), the proposed stress model adds the capability of describing the semi - solid material behaviour in terms of strain and structural evolution. The proposed stress model was able to explain the strain - softening behaviour of the semi - solid material. Furthermore, a simulation model that includes the yield function, the flow rule, and the stress model has been developed and utilized to investigate the effects of various process parameters, including analysis type (isothermal vs nonisothermal), punch velocity, initial solid fraction, and workpiece shape (“flat” versus “tall”) on the micro - / mesofeature formation process.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali