ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
On the basis of thermo-mechanical coupled FEM model which characterized thecomposites liquid-solid extrusion process, the constant-velocity and non-constant-velocity extrusionprocess were simulated by 3D thermo-mechanical FEM. Their influence on forming temperature,forming quality and deforming force was analyzed and compared. In the constant-velocity extrusionprocess, the results show the over-high and low forming temperature in earlier and terminal extrusionstage were responsible for the surface annular cracks and inner fibers breakage. In the newnon-constant-velocity extrusion process, however, the range of forming temperature can be shortenedin a reasonable range and the over-high and low forming temperature were thus eliminated. Thereforethe forming quality and its consistency can be improved. In addition, the deforming force can also bereduced. The simulation and the mechanisms analysis coincide with the experiment results reported inprevious literatures. The study provides the theoretical gist and a new feasible technical scheme tofavor the consistency of the extruded product quality in composites liquid-solid extrusion process
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.210.pdf
