Nonlinear Structural Materials Module

Nonlinear Structural Materials Module

Expand Structural Analyses with Nonlinear Materials via the Nonlinear Structural Materials Module

Nonlinear Structural Materials Module

The plastic deformation under the influence of an inflated balloon in a stent design. The foreshortening and dogboning are investigated.

Add Hyperelastic, Elastoplastic, Viscoplastic, and Creep Material Models

The Nonlinear Structural Materials Module augments the mechanical capabilities of the Structural Mechanics Module and the MEMS Module with nonlinear material models, including large strain plastic deformation capabilities. When the mechanical stress in a structure becomes large, certain nonlinearities in the material properties force you to abandon linear material models. This situation also occurs in some operating conditions, such as high temperature. The Nonlinear Structural Materials Module adds elastoplastic, viscoplastic, creep, and hyperelastic, and hygroscopic swelling material models.

User-defined material models based on stress or strain invariants, flow rules, and creep laws can easily be created directly in the user interface with the built-in constitutive laws as a starting point. You can both combine material models and include multiphysics effects. The tutorial models that accompany the module illustrate this by showcasing combined creep and plasticity, thermally induced creep and viscoplasticity, as well as orthotropic plasticity. The Nonlinear Structural Materials Module also has important applications where it is combined with the Fatigue Module and the Multibody Dynamics Module.

Additional Images:

  • A circular bar is subjected to a uniaxial tensile test, resulting in large deformations. The bar experiences large-scale necking and plastic deformation across its central cross-sectional region. A circular bar is subjected to a uniaxial tensile test, resulting in large deformations. The bar experiences large-scale necking and plastic deformation across its central cross-sectional region.
  • Fluid flow, pressure field, and von Mises stresses in a peristaltic pump. The fluid-structure interaction is caused by the roller squeezing the tubing’s walls. Large deformations, contact, and the hyperelastic behavior of the tubing material are considered. The simulation is provided courtesy of Nagi Elabbasi, Veryst Engineering. Fluid flow, pressure field, and von Mises stresses in a peristaltic pump. The fluid-structure interaction is caused by the roller squeezing the tubing’s walls. Large deformations, contact, and the hyperelastic behavior of the tubing material are considered. The simulation is provided courtesy of Nagi Elabbasi, Veryst Engineering.

Hyperelastic Plasticity and Viscoplasticity Creep
Arruda-Boyce Anand Coble
Blatz-Ko Kinematic Plastic Hardening Deviatoric
Damping Isotropic Plastic Hardening Garofalo (Hyperbolic Sine)
Gao Large Strain Plasticity Nabarro-Herring
Gent Orthotropic Hill Plasticity Norton
Large Strain Plasticity Perfectly Plastic Hardening Norton-Bailey
Mooney-Rivlin (two, five and nine parameters) Thermal Expansion Potential
Murnaghan Tresca Yield Criterion User-defined Creep
Neo-Hookean User-defined Plasticity Volumetric
Ogden von Mises Yield Criterion Weertman
St Venant-Kirchhoff Perzyna  
Storakers Chaboche  
Thermal Expansion Shima-Oyane  
User-defined Hyperelastic Material Gurson  
Varga Gurson-Tvergaard-Needleman  
Yeoh Fleck-Kuhn-McMeeking  
  FKM-GTN  
 

Nonlinear Structural Materials Module

Product Features

  • Elastoplasticity
  • Hyperelasticity
  • Viscoplasticity
  • Creep
  • Large deformations
  • Large strain plasticity
  • User-defined creep, hyperelasticity, and plasticity
  • User-defined modeling with stress or strain invariants and principal stretches
  • Hygroscopic swelling
  • Anisotropic thermal expansion for hyperelastic materials
  • Multiphysics with nonlinear structural materials including temperature dependent material data
  • Can be used together with the Fatigue Module
  • Can be used together with the Multibody Dynamics Module
  • Orthotropic Hill plasticity

Viscoplastic Creep in Solder Joints

Stress Analysis of a Pressure Vessel

Elastoacoustic Effect in Rail Steel

Plastic Deformation During the Expansion of a Biomedical Stent

Hyperelastic Seal

Necking of an Elastoplastic Metal Bar

Temperature-Dependent Plasticity in Pressure Vessel

Inflation of a Spherical Rubber Balloon

Snap Hook

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