Hyperelastic Material Model for Snap-Through Structure
Budget / Salary₹1,500–12,500
TypeFreelance project
LocationRemote
Posted1 hour ago
Neo-Hookean is suitable as a starting hyperelastic material model for snap-through structure, especially if we are using a TPU/rubber-like material and the strain level is not extremely high.
start with Neo-Hookean for the baseline ANSYS model because it is simple, stable, and easy to calibrate. Then, if my experimental TPU data shows large nonlinear deformation that Neo-Hookean cannot match well, compare it with Mooney–Rivlin or Ogden.
For snap-through analysis, the important point is that the material model must handle large strain + large deformation. Neo-Hookean does this much better than a simple linear elastic model. but
“A Neo-Hookean hyperelastic material model was initially selected to represent the nonlinear elastic behaviour of the TPU structure under large deformation. The model provides a simple and computationally efficient description suitable for preliminary snap-through analysis. More advanced hyperelastic models, such as Mooney–Rivlin or Ogden, may be considered if greater agreement with experimental material behaviour is required.”
One important limitation: Neo-Hookean alone will not realistically model hysteresis/true energy dissipation. It mainly gives recoverable elastic behaviour. If our final goal is specifically energy dissipation, we eventually need experimental hysteresis data and possibly a visco-hyperelastic or similar dissipative model. For first proving snap-through, though, Neo-Hookean is a very reasonable choice. so lets discuss little bit in your free time brother, i am also not expert in this field,TPU95A material is usedAs per our last discussion below task has to be performed:
With Material TPU95A
1) with 1.5mm thickness
2) 2mm thickness
3) 2.5mm thickness
4) 3mm thickness
5) 3.5mm thickness
6) 4mm thickness
Total 6 iteration
high nonlinearity (hyperelastic) desin already done just need ANSYS part simulation
start with Neo-Hookean for the baseline ANSYS model because it is simple, stable, and easy to calibrate. Then, if my experimental TPU data shows large nonlinear deformation that Neo-Hookean cannot match well, compare it with Mooney–Rivlin or Ogden.
For snap-through analysis, the important point is that the material model must handle large strain + large deformation. Neo-Hookean does this much better than a simple linear elastic model. but
“A Neo-Hookean hyperelastic material model was initially selected to represent the nonlinear elastic behaviour of the TPU structure under large deformation. The model provides a simple and computationally efficient description suitable for preliminary snap-through analysis. More advanced hyperelastic models, such as Mooney–Rivlin or Ogden, may be considered if greater agreement with experimental material behaviour is required.”
One important limitation: Neo-Hookean alone will not realistically model hysteresis/true energy dissipation. It mainly gives recoverable elastic behaviour. If our final goal is specifically energy dissipation, we eventually need experimental hysteresis data and possibly a visco-hyperelastic or similar dissipative model. For first proving snap-through, though, Neo-Hookean is a very reasonable choice. so lets discuss little bit in your free time brother, i am also not expert in this field,TPU95A material is usedAs per our last discussion below task has to be performed:
With Material TPU95A
1) with 1.5mm thickness
2) 2mm thickness
3) 2.5mm thickness
4) 3mm thickness
5) 3.5mm thickness
6) 4mm thickness
Total 6 iteration
high nonlinearity (hyperelastic) desin already done just need ANSYS part simulation
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