About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Shockwave Propagation and Attenuation in Poly(ethylene glycol) Diacrylate Hydrogels |
Author(s) |
Ke Luo, Ghatu Subhash, Douglas E. Spearot |
On-Site Speaker (Planned) |
Douglas E. Spearot |
Abstract Scope |
The nonequilibrium molecular dynamics (NEMD) method is used to investigate one-dimensional shockwaves in poly(ethylene glycol) diacrylate (PEGDA) hydrogels. The role of PEGDA polymer concentration on shockwave velocity and the structure of the shock front is evaluated by constructing hydrogels with 20, 35, and 50 wt.% PEGDA concentrations with an idealized crosslinked network. The NEMD simulations provide data that is used to develop an analytical model to predict shockwave propagation and attenuation characteristics in hydrogels, by combining the classical method of shock characteristics and a solution for the shock front structure. The new model successfully captures salient features of shockwave attenuation, including shock pressure, the velocities of the shock and release waves, and the attenuation timeline. Hydrogels with higher polymer concentrations exhibit a shorter attenuation time at all particle velocities studied. This behavior is attributed to differences in bulk properties and shock front structure in hydrogels with different concentrations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Biomaterials, Mechanical Properties |