A data-driven constitutive model for Mullins-type damage in rubberlike materials

Date

2025-8-28

Author

Fidancı, Arif Arda

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Rubberlike materials exhibit history-dependent and nonlinear responses under mechanical loading, including large deformations and stress softening due to Mullins-type damage. This thesis develops a data-driven constitutive framework incorporating hyperelasticity and Mullins-type damage. The hyperelastic response is described using a spline-based model derived from experimental data, while stress softening is represented by a damage variable reflecting the material's energy history. The damage evolution, although not expressed in closed form, is identified through a data-driven procedure calibrated with cyclic loading tests. The formulation ensures thermodynamic consistency and is validated against uniaxial, equibiaxial, and cyclic experiments, accurately reproducing the nonlinear elastic response and stress softening. In conclusion, the thesis presents a flexible and reliable framework closely aligned with experimental observations.

Subject Keywords

Mullins-Type Damage, Constitutive Modeling, Rubberlike Materials, Data-Driven Modeling, Hyperelasticity

URI

https://hdl.handle.net/11511/116000

Collections

Graduate School of Natural and Applied Sciences, Thesis