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Digimat-MF aims at predicting the nonlinear mechanical, thermal and electric behavior of multi-phase materials based on the constitutive properties of the base materials and the <strong>com</strong>posite morphology (inclusion weight fraction, length and orientation). Digimat-MF is accurate, efficient and very easy to learn and use. NEW IN <strong>DIGIMAT</strong> 4.1 Thermo-elastoplastic & thermo-elastoviscoplastic material models Viscoelastic-viscoplastic material models insensitive to time steps Transversely isotropic and orthotropic Ohm & Fourier laws Improved discretization scheme of the orientation distribution function (ODF) GUI improvements: - Redesign of failure indicator definition - Redesign of piece-wise linear function capability - 2D plots( Probing, grid, box zoom), Histogram capabilities New GUI functionalities User defined outputs New outputs section to customize outputs requests MAIN CAPABILITIES Nonlinear (per-phase) Material Models Homogenization Methods Creep capabilities with new thermoelastoviscoplastic material model Linear thermo-elasticity - Anisotropic phases - Temperature-dependent properties Linear viscoelasticity Elasto-plasticity: - Isotropic hardening: power, exponential or exponential linear laws - Small deformation with large rotation Cyclic elasto-plasticity: Kinematic hardening; linear with restoration Pressure-dependent elasto-plasticity (Drucker-Prager) Elasto-plasticity with damage (Lemaître-Chaboche) Elasto-viscoplastic : Creep models: Norton laws, Power laws, Prandtl law Viscoelasticity-viscoplasticity Hyperelastic (finite strain): neo-Hookean, Mooney-Rivlin, Ogden, Swanson, Storakers (<strong>com</strong>pressible foams) Elasto-viscoplastic (finite strain): Leonov-EGP Thermal & electrical conductivity: Ohm & Fourier Microstructure Morphology Multiple reinforcement phases Multi-layer microstructure Ellipsoidal reinforcements (fillers, fibers, platelets) Aspect ratio distribution General orientation (fixed, random, 2 nd order orientation tensor) Void inclusions Coated inclusions with relative or absolute thickness Deformable, quasi-rigid or rigid inclusions Mori-Tanaka Interpolative double inclusion 1 st and 2 nd order homogenization schemes Multi-step, multi-level homogenization methods High quality ODF reconstruction method: Orthotropic method Failure Indicators Applied at micro and/or macro scale, or on pseudo-grains using the FPGF model (First Pseudo-Grain Failure model) Failure models: Max stress and Max strain, Tsai-Hill 2D & 3D, Azzi- Tsai-Hill 2D, Tsai-Wu 2D & 3D, Hashin-Rotem 2D, Hashin 2D & 3D Strain rate dependent failure criteria Failure criteria on Leonov-EGP & hyperelastic material models Loading Monotonic, cyclic or user-defined history loading Multi-axial stress or strain, General 2D & 3D Mechanical and thermo-mechanical Prediction of thermal & electrical conductivities Loading definition from structural FEA results, i.e. Abaqus ODB file Isotropic Extraction Methods General Spectral Modified spectral More Functionalities Prediction of orthotropic engineering constants Multi-analyses capability Interoperability with Digimat-FE and Digimat-MX Handling of encrypted material files Partial unloads Damaging in a Lemaître-Chaboche material t User-defined loading with intermediate unloadings used to identify the end of the elastic regime Multi-layer microstructure Viscoelastic-Viscoplastic model: Strain rate dependency accounted on overall range of deformation Prediction of temperature dependent coefficient of thermal expansion <strong>DIGIMAT</strong>; The nonlinear multi-scale material & structure modeling platform
Digimat-FE is used to generate realistic Representative Volume Element (RVE) for a large variety of material microstructures (plastics, rubbers, metals, graphite,...). The resulting finite element models are solved using major FEA software. Digimat-FE has an extensive set of capabilities that enable user-friendly generation of extremely <strong>com</strong>plex material microstructure morphologies that are accurately modeled at a reasonable CPU cost. NEW IN <strong>DIGIMAT</strong> 4.1 New post-processing capabilities: summary of RVE generation process as well as features to validate the RVE geometry. Improved handling of size distribution GUI improvements: - 2D plots: Probing, grid, box zoom - Histogram capabilities Single results file grouping fields extracted from ABAQUS ODB file MAIN CAPABILITIES Definition of Composite Constituents Inclusion shapes: any shape imported from a geometry file: spheroids, platelets, ellipsoids, cylinders (capped or not), prisms, polyhedrons made of 20 faces (icosahedrons) Definition of the constituents’ material behavior: elastic & thermo-elastic, viscoelastic, hyperelastic & thermo-hyperelastic, elastoplastic, elasto-viscoplastic, thermal, electrical Inter operability with Digimat-MF and Digimat-MX for material definition New post-processing capabilities of the generated RVE geometry Microstructure Definition Microstructure morphology definition: - Volume or mass content - Multiple reinforcement phases - Ellipsoidal reinforcements (fillers, fibers, platelets) - General orientation definition (fixed, random, 2 nd order orientation tensor) - Possibility to model void inclusions, coated inclusions with relative or absolute thickness & clustering of inclusions Multi-layer microstructure Filler/Matrix debonding RVE Generation Microstructure generation with real-time preview & Animation of RVE generation process Maximum packing algorithm 2D RVE generation RVE Loading Definition, Export Monotonic, cyclic or user-defined history loading Multi-axial stress or strain, General 2D & 3D Mechanical and thermo-mechanical Prediction of thermal and electrical conductivities Computation of the percolation threshold Loading definition from structural FEA, i.e. Abaqus ODB file Export of RVE geometry in <strong>com</strong>mon formats: STEP, IGES, BREP Export geometry and model definition to Abaqus/CAE Export geometry to ANSYS Workbench FE Meshing Geometry export to Abaqus/CAE and ANSYS Workbench Automatic adaptative mesh seeding and iterative mesh generation in Abaqus/CAE RVE meshing using embedded beam elements, straight or curved The material modeling <strong>com</strong>pany Basic inclusion shapes Mesh generation in ABAQUS/CAE Decohesion seen at the tip of the fibres using shell cohesive ele- Stress distribution in fiber reinforced materials Microstructure generation of metal matrix <strong>com</strong>posites Multi-layered microstructures Percolation path shown with black inclusions Statistical distribution of matrix stresses www.e-Xstream.<strong>com</strong>
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DIGIMAT Brochure - Figes.com.tr

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