Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer
Depth sensing indentation holds the promise of local mechanical properties determination. However, the number of studies on materials that exhibit time-dependent and hydrostatic pressure-dependent behavior is still scarce. This paper aims to understand the effect of loading strain rate on the nano-i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Budapest University of Technology
2023-06-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0012327&mi=cd |
| _version_ | 1797853373325639680 |
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| author | Laura Alejandra Fasce Lucas Sánchez Fellay Patricia María Frontini |
| author_facet | Laura Alejandra Fasce Lucas Sánchez Fellay Patricia María Frontini |
| author_sort | Laura Alejandra Fasce |
| collection | DOAJ |
| description | Depth sensing indentation holds the promise of local mechanical properties determination. However, the number of studies on materials that exhibit time-dependent and hydrostatic pressure-dependent behavior is still scarce. This paper aims to understand the effect of loading strain rate on the nano-indentation response of an aerospace epoxy resin by combining physical measurements and numerical simulations. Physical nano-indentation tests were carried out using a Berkovich indenter at different constant loading strain rates (0.01 to 1.25 s–1). It was observed that as the loading strain rate increases, the penetration displacement at which the target load is reached decreases while the maximum displacement attained at the end of the load-hold period increases. The indentation response was numerically simulated to get insight into the phenomenon by finite element analysis. The polymer behavior was described by a nine-parameter elastic-viscoplastic constitutive model (EVP-9). Constitutive parameters were calibrated from uniaxial tensile and compression experimental data. Simulations agreed reasonably well with physical experiments being able to reproduce the loading strain rate effect observed in physical nano-indentation tests. |
| first_indexed | 2024-04-09T19:49:37Z |
| format | Article |
| id | doaj.art-458feb5d735646649ac3069fd3f856c8 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-04-09T19:49:37Z |
| publishDate | 2023-06-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-458feb5d735646649ac3069fd3f856c82023-04-03T09:32:16ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2023-06-0117664765910.3144/expresspolymlett.2023.47Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymerLaura Alejandra FasceLucas Sánchez FellayPatricia María FrontiniDepth sensing indentation holds the promise of local mechanical properties determination. However, the number of studies on materials that exhibit time-dependent and hydrostatic pressure-dependent behavior is still scarce. This paper aims to understand the effect of loading strain rate on the nano-indentation response of an aerospace epoxy resin by combining physical measurements and numerical simulations. Physical nano-indentation tests were carried out using a Berkovich indenter at different constant loading strain rates (0.01 to 1.25 s–1). It was observed that as the loading strain rate increases, the penetration displacement at which the target load is reached decreases while the maximum displacement attained at the end of the load-hold period increases. The indentation response was numerically simulated to get insight into the phenomenon by finite element analysis. The polymer behavior was described by a nine-parameter elastic-viscoplastic constitutive model (EVP-9). Constitutive parameters were calibrated from uniaxial tensile and compression experimental data. Simulations agreed reasonably well with physical experiments being able to reproduce the loading strain rate effect observed in physical nano-indentation tests.http://www.expresspolymlett.com/letolt.php?file=EPL-0012327&mi=cdmaterial testingthermosetting resinsnanoindentationmodelling and simulationmechanical properties |
| spellingShingle | Laura Alejandra Fasce Lucas Sánchez Fellay Patricia María Frontini Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer eXPRESS Polymer Letters material testing thermosetting resins nanoindentation modelling and simulation mechanical properties |
| title | Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer |
| title_full | Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer |
| title_fullStr | Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer |
| title_full_unstemmed | Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer |
| title_short | Effect of loading strain rate on nano-indentation response of an aerospace grade epoxy polymer |
| title_sort | effect of loading strain rate on nano indentation response of an aerospace grade epoxy polymer |
| topic | material testing thermosetting resins nanoindentation modelling and simulation mechanical properties |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0012327&mi=cd |
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