in silico
Phase 1 : In Silico Validation
- Objectif
- To determine if the proposed causal chain (ECM deposition/scaffold degradation → increased effective stiffness → increased resonant frequency) is physically plausible and to identify critical parameter sensitivities before any wet-lab work.
- Coût estimé
- €0-2k (assuming academic licenses exist; otherwise, cloud compute credits)
- Durée estimée
- 4-6 weeks
- Critères de réussite
- Model-predicted Δf0 · The model must predict a Δf0 increase of 10-50% for a realistic ECM/scaffold property evolution, aligning with the hypothesized 15-40%. · (Compare f0 at simulated Day 0 and Day 28 for the baseline parameter set.)
- Critical Parameter Identification · The model must identify that Δf0 is more sensitive to ECM modulus/volume than to scaffold degradation rate (supporting the central hypothesis). If degradation dominates, the signal may be negative or noisy. · (Sobol sensitivity indices from parameter sweep; ECM contribution >60%.)
- On continue si
- Model predicts Δf0 increase >10% and ECM parameters are the dominant drivers (>60% sensitivity).
- On arrête si
- Model predicts Δf0 decrease or change <5% under all realistic parameter sets, or scaffold degradation is the dominant driver (>70% sensitivity), invalidating the core premise.
- On réoriente si
- Model shows high sensitivity to boundary conditions or damping (>50%). Pivot: Redesign Phase 2 to first characterize and rigidly fix boundary conditions in the bioreactor.
- Risques
- Model oversimplification fails to capture critical 3D composite effects.Probabilité : mediumParade : Validate sub-model (e.g., unit cell RVE) against analytical composite mechanics (Rule of Mixtures, Halpin-Tsai).
- Lack of accurate time-dependent material property data for PLCL/ECM.Probabilité : mediumParade : Use bounded parameter sweeps across literature extremes to test hypothesis robustness.