Global/local finite element analysis for singular stress fields near the junction of dissimilar elastic and elastic-plastic materials in electronic packages

2003 ◽  
Author(s):  
N. Kay ◽  
E. Madenci ◽  
S. Shkarayev
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Fields ◽  
Electronic Packages ◽  
Singular Stress ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Plastic Materials ◽  
Singular Stress Fields ◽  
Elastic Plastic Materials

On Determining Elastic Modulus from Instrumented Indentation

2013 ◽  
Vol 668 ◽  
pp. 616-620
Author(s):  
Shuai Huang ◽  
Huang Yuan
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Plastic Material ◽  
Instrumented Indentation ◽  
Computational Simulations ◽  
Elastic Plastic ◽  
Modified Method ◽  
Plastic Materials ◽  
Elastic Plastic Material ◽  
Elastic Plastic Materials

Computational simulations of indentations in elastic-plastic materials showed overestimate in determining elastic modulus using the Oliver & Pharr’s method. Deviations significantly increase with decreasing material hardening. Based on extensive finite element computations the correlation between elastic-plastic material property and indentation has been carried out. A modified method was introduced for estimating elastic modulus from dimensional analysis associated with indentation data. Experimental verifications confirm that the new method produces more accurate prediction of elastic modulus than the Oliver & Pharr’s method.

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