Journal Title : International Journal of Modern Trends in Engineering and Science
Paper Title : EFFECT OF POROSITY MODELING ON STRESS CONCENTRATION WITH HELP OF FINITE ELEMENT ANALYSIS
Volume 03 Issue 10 2016
ISSN no: 2348-3121
Page no: 36-39
Abstract – Automobile component of Aluminum alloy with high pressure die casting has light weight as well as good strength. But it is casting component and there is possibility of porosity occurrence in the component. There are two types of porosities mainly gas porosity and shrinkage porosity. As per the literature review it is clear that it is difficult to remove the porosity from casting component. Therefore an acceptance criterion is decided for casting components. Ansys 16.2(mechanical simulation software) is used for simulation to see the effect of porosity on stress concentration. The stress results are compared with baseline model i.e. without porosity. In this paper we are modeling the porosity in CAD geometry, which is based on actual porosity observed on the component and mold flow analysis data i.e. casting simulation. For modeling purpose gas porosity taken into consideration as gas porosity has globular shape, and even distributed. Effect of porosity on stress concentration of aluminum casting component is found out. The stress results are compared with baseline model i.e. without porosity model. In literature review all researchers use experimental methods or numerical methods for finding the effect of porosity on stress concentration as well as fatigue life. In this paper effect of porosity on stress concentration and fatigue life is determined with help of modeling porosity in CAD geometry. Porosity modeling location decided is based on mold flow analysis data and actual component inspection. This research is based on the finite elements analysis with using Ansys.
Keywords— Porosity Modeling, CAD Geometry, Aluminum Die Casting, Finite Element Anlaysis, Stress Concentration
- Ferencz Peti, Lucian Grama, “Analyze of the possible causes of porosity type deffects in aluminum high pressure die cast parts”, Scientific Bulletin of the Petru Major university of Targu Mures, Vol. 8(XXV) no. 1, 2011, ISSN, Pages 1841-9267
- S. Sabau, S. Viswanathan, “Porosity prediction in aluminum a356 alloy castings”, Metals and Ceramics Division, 2008
- Beackermann, “Porosity simulation for high pressure die casting”, Die casting engineer, May 2009
- M. Imad Khan, Yakov Frayman, and Saeid Nahavandi, “Modelling of porosity defects in high pressure die casting with a neural network”
- Serrano-Munoz, J.-Y. Buffiere, C. Verdu, Y. Gaillard, P. Mu, Y. Nadot, “Influence of surface an internal casting defects on the fatigue behaviour of A357-T6 cast aluminium alloy”, International Journal of Fatigue, volume 00, July 2015, Pages1–20
- Shaomin Li, Kenichiro Mine, Shinji Sanakanishi, Koichi Anzai, “Quantitative Prediction Method for Shrinkage Porosity Considering Molten Metal Supply by Pressure in Squeeze Casting”, Materials Transactions, Vol. 48, No. 8 (2007) pp. 2186 to 2193.
- S. N. Aqida, M. I. Ghazali& J. Hashim, “Effects of porosity on mechanical properties of Metal matrix composite: an overview”, Journal technology, volume 40(A), Jun. 2004, Page no 17–32