Basics of Material Non Linearity | Ansys Workbench
In ANSYS, Material Nonlinearity refers to the behavior of a material that does not follow a simple linear stress-strain relationship. When a material exhibits nonlinear behavior, the relationship between stress and strain is not proportional and depends on the magnitude of the applied load, strain, or deformation. This nonlinearity can be due to various factors, such as:
Plasticity: Permanent deformation after a material has yielded.
Hyperelasticity: Large elastic deformations in materials like rubber.
Creep: Time-dependent deformation under constant stress.
Viscoelasticity: A material that exhibits both elastic and viscous behavior.
Damage/Failure: Materials that can experience damage or failure during loading.
In this video, we are focusing on Plasticity modeling - Like
1)Isotropic Plasticity: Material yields uniformly in all directions.
2)Kinematic Plasticity: Material exhibits direction-dependent yielding
Material nonlinearity in ANSYS is a powerful tool for simulating real-world materials that do not behave elastically under all conditions. By defining the correct material model and analysis settings, ANSYS can handle complex behaviors such as plasticity, hyperelasticity, and time-dependent deformations.
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Chapters
02:22 - Stress vs Strain Curve
05:24 - Young's Modulus Relation
07:20 - Bilinear Hardening formula
07:55 - Engineering Data vs True Data
12:08 - Engineering Stress/Strain to True Stress/Strain Conversion
12:41 - Plastic Strain Limit - % of Elongation
18:51 - Multilinear Hardening data