| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
An Experimental Technique for Probing Cavitation Pressure in Soft Matter Under Azimuthal Shear |
| Author(s) |
Alexandria Trevino, Yuan Ji, Christopher J. Karber, Jacob A. Rogers, Justin W. Wilkerson |
| On-Site Speaker (Planned) |
Alexandria Trevino |
| Abstract Scope |
One failure mode experienced by biological materials is cavitation. Synthetics gels can serve as biological tissue analogs for study of this phenomenon. Currently, gel cavitation is typically investigated in initially stress-free materials via cavitation rheology. The lack of cavitation experiments on pre-loaded gel samples, however, restricts generalized-cavitation theory development/validation. This study introduces a needle-based, superimposed-shear-cavitation (SSC) apparatus to examine the role of shear stress in cavity nucleation, expansion, and collapse in soft matter. The sample-containing beaker in the traditional needle-induced cavitation (NIC) approach is replaced with a Taylor-Couette cell to subject samples to torsion before needle insertion. To demonstrate, SSC was used to probe cavitation in tri-block copolymer (PMMA-PnBA-PMMA) gel samples. Critical cavitation pressure and the time until it was reached increased and decreased, respectively, with added sample torsion. SSC and NIC data agreed for no sample torsion. SSC results were found to be valuable for generalized cavitation model validation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Polymers |