H. Helisaz; M. Bacca; M. Chiao
Exp Mech (2022). , Published: 04 April 2022
https://doi.org/10.1007/s11340-022-00837-7
4 citations · 0 en 2025–2026
Les titres, résumés et légendes des publications sont présentés en anglais.
Abstract
Indentation tests are widely used to characterize the viscoelastic properties of materials. An appropriate theoretical framework is required to model an indentation test and derive the material properties in an accurate and timely manner.
Objective
In this work, we studied the indentation behavior of a viscoelastic material by investigating the effects of indenter size, indentation depth, indentation rate, and QLV parameters on the stress response during a ramp-and-hold indentation with a flat-ended tip. Based on the findings, we propose a procedure for material characterization using an indentation test.
Methods
We translated the 3D quasi-linear viscoelastic (QLV) model into ABAQUS® with a customized user material subroutine. Each QLV relaxation parameter is shown to govern the stress relaxation during a specific time interval, and so the material’s parameters are derived by comparing the stress relaxation in different time intervals with pre-computed results from simulation. The procedure provides a fast and straightforward approach that is superior to inverse finite element methods.
Results
Our procedure is applicable for indentation tests with various indenter sizes and indentation depths. The accuracy of the suggested procedure was evaluated by comparing the derived parameters with those obtained from a 1D uniaxial compression test. Our method provides parameters with high precision (standard deviation less than 10%) and good accuracy (error less than 20%).
Conclusion
Due to the wide applicability of indentation tests for characterization, we believe our method provides a fast and accurate means for deriving the viscoelastic properties of materials.
Utilisation des équipements
L’étude propose une procédure de caractérisation qui détermine des paramètres viscoélastiques quasi linéaires par indentation avec rampe et maintien à l’aide d’un poinçon à extrémité plane, en comparant la relaxation des contraintes à des simulations par éléments finis. Les paramètres sont comparés à ceux obtenus en compression uniaxiale. Le résumé disponible n’identifie ni le matériau testé ni l’équipement expérimental, empêchant de vérifier le rôle d’un Mach-1 Mechanical Tester.
Configurations de test (1)
Configuration de test