Determination of elastic and viscoplastic material properties obtained from indentation tests using a combined finite element analysis and optimization approach

作者：Kang J J; Becker A A^*; Sun W

来源：Proceedings of the Institution of Mechanical Engineers - Part L: Journal of Materials: Design and Applications , 2015, 229(3): 175-188.

DOI：10.1177/1464420713504534

• Indentation
• finite element analysis
• optimization
• indentation
• two-layer viscoplasticity model

Conventional indentation tests do not provide an accurate estimation of viscoplastic material properties. In this work, a combined finite element analysis and optimization approach is developed for the determination of elastic-plastic and creep material properties using only a single indentation loading-unloading curve based on a two-layer viscoplasticity model. Utilizing the indentation loading-unloading curve obtained from a finite element-simulated experiment with a spherical and a conical indenter, a set of six key material properties (Young's modulus, yield stress, work hardening exponent and three creep parameters) can be determined. Non-linear optimization algorithms are used with different sets of initial material properties, leading to good agreements with the numerically simulated target loading-unloading curves.

• 出版日期2015-6