شماره ركورد كنفرانس :
4562
عنوان مقاله :
Mechanical characterization of a hyperelastic biopolymer using nano-indentation experiment and finite element method
Author/Authors :
A Karimzadeh School of Mechanical Engineering - Iran University of Science and Technology, Tehran , M.R Ayatollahi School of Mechanical Engineering - Iran University of Science and Technology, Tehran , A.R Bushroa Department of Mechanical Engineering - Faculty of Engineering - University of Malaya, Malaysia
كليدواژه :
Hyperelastic behavior , nano-indentation experiment , Bis-GMA biopolymer , FE simulation , stress relaxation
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۶
چكيده لاتين :
In this study the hyperelastic behavior of Bis-GMA was determined by nano-indentation experiment and finite element (FE) simulation method. For this purpose, the nano - indentation experiment was performed on Bis- GMA specimen according to its common method. A three dimensional hyperelastic FE model was employed to simulate the nano-indentation procedure. The uniaxial compression test was also done on Bis-GMA samples to measure the required material parameters for the FE model.Results of the nano-indentation experiment indicated that stress relaxation occurs in the Bis-GMA specimen when the indenter is held at the maximum indentation depth. The stress relaxation modulus in term of holding time was calculated from the results of nano-indentation experiment. Comparing the load-displacement curve obtained from the FE simulation with corresponding values of the nano-indentation experiment revealed good agreement when using a second order polynomial model.
