Mechanical Characterization of a Hyperelastic Biopolymer Using Nano-Indentation Experiment and Finite Element Method

پديدآورندگان

Karimzadeh A School of Mechanical Engineering, Iran University of Science and Technology, Tehran , Ayatollahi M.R. School of Mechanical Engineering, Iran University of Science and Technology, Tehran , Bushroa A.R. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya

تعداد صفحه

2

كليدواژه

Hyperelastic behavior , nano , indentation experiment , Bis , GMA biopolymer , FE simulation , stress relaxation modulus

سال انتشار

1394

عنوان كنفرانس

كنفرانس بين المللي دو سالانه مكانيك جامدات تجربي

زبان مدرك

انگليسي

چكيده فارسي

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 BisGMA 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.

كشور

ايران