| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Engels, Tom A. P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024A macroscopic viscoelastic viscoplastic constitutive model for porous polymers under multiaxial loading conditionscitations
- 2023Effect of temperature, rate, and molecular weight on the failure behavior of soft block copoly(ether-ester) thermoplastic elastomerscitations
- 2023Melt-Extruded Thermoplastic Liquid Crystal Elastomer Rotating Fiber Actuatorscitations
- 2023Melt-Extruded Thermoplastic Liquid Crystal Elastomer Rotating Fiber Actuatorscitations
- 2023Photoswitchable Liquid-to-Solid Transition of Azobenzene-Decorated Polysiloxanescitations
- 2023Photoswitchable Liquid-to-Solid Transition of Azobenzene-Decorated Polysiloxanescitations
- 2021Influence of fiber orientation, temperature and relative humidity on the long-term performance of short glass fiber reinforced polyamide 6citations
- 2021NIR–vis–UV Light-Responsive High Stress-Generating Polymer Actuators with a Reduced Creep Ratecitations
- 2020Physical background of the endurance limit in poly(ether ether ketone)citations
- 2020Processing and Properties of Melt Processable UHMW-PE Based Fibers Using Low Molecular Weight Linear Polyethylene'scitations
- 2020Tuning polymer properties of non-covalent crosslinked PDMS by varying supramolecular interaction strengthcitations
- 2020Tuning polymer properties of non-covalent crosslinked PDMS by varying supramolecular interaction strengthcitations
- 2020Stimuli-Responsive Shape Changing Commodity Polymer Composites and Bilayerscitations
- 2019Predicting plasticity-controlled failure of glassy polymerscitations
- 2019Predicting plasticity-controlled failure of glassy polymers:influence of stress-accelerated progressive physical agingcitations
- 2019An untethered magnetic- and light-responsive rotary gripper: shedding light on photoresponsive liquid crystal actuatorscitations
- 2018Predicting long-term crack growth dominated static fatigue based on short-term cyclic testingcitations
- 2018Predicting long-term crack growth dominated static fatigue based on short-term cyclic testingcitations
- 2018Designing multi-layer polymeric nanocomposites for EM shielding in the X-bandcitations
- 2017Future nanocomposites : exploring multifunctional multi-layered architectures
- 2017Photonic shape memory polymer with stable multiple colorscitations
- 2015Yield stress distribution in injection-moulded glassy polymerscitations
- 2012Time-dependent failure of amorphous poly-D,L-lactide : influence of molecular weightcitations
- 2011Criteria to predict the embrittlement of polycarbonatecitations
- 2010Time-dependent failure in load-bearing polymers : a potential hazard in structural applications of polylactidescitations
- 2010Lifetime assessment of load-bearing polymer glasses : an analytical framework for ductile failurecitations
- 2009Improvement of the long-term performance of impact-modified polycarbonate by selected heat treatmentscitations
- 2009Predicting the long-term mechanical performance of polycarbonate from thermal history during injection moldingcitations
- 2009Predicting the yield stress of polymer glasses directly from processing conditions: application to miscible systemscitations
- 2009Numerical simulation of flat-tip micro-indentation of glassy polymers: influence of loading speed and thermodynamic statecitations
- 2008Does the strain hardening modulus of glassy polymers scale with the flow stress?citations
- 2006Indentation: the experimenter's holy grail for small-scale polymer characterization?
- 2005Quantitative prediction of long-term failure of Polycarbonatecitations
Places of action
| Organizations | Location | People |
|---|
article
Numerical simulation of flat-tip micro-indentation of glassy polymers: influence of loading speed and thermodynamic state
Abstract
Flat-tip micro-indentation tests were performed on quenched and annealed polymer glasses at various loading speeds. The results were analyzed using an elasto-viscoplastic constitutive model that captures the intrinsic deformation characteristics of a polymer glass: a strain-rate dependent yield stress, strain softening and strain hardening. The advantage of this model is that changes in yield stress due to physical aging are captured in a single parameter. The two materials studied (polycarbonate (PC) and poly(methyl methacrylate) (PMMA)) were both selected for the specific rate-dependence of the yield stress that they display at room temperature. Within the range of strain rates experimentally covered, the yield stress of PC increases linearly with the logarithm of strain rate, whereas, for PMMA, a characteristic change in slope can be observed at higher strain rates. We demonstrate that, given the proper definition of the viscosity function, the flat-tip indentation response at different indentation speeds can be described accurately for both materials. Moreover, it is shown that the model captures the mechanical response on the microscopic scale (indentation) as well as on the macroscopic scale with the same parameter set. This offers promising possibilities of extracting mechanical properties of polymer glasses directly from indentation experiments.