High-accuracy material card calibration built on real test data, powering LS-DYNA, ABAQUS, ANSYS, Moldflow and other mainstream solvers — shortening product development and validation cycles.
A CAE material card is a parameter file that describes how a material behaves mechanically inside finite-element software. It converts the stress-strain curves obtained from real tensile, shear and fatigue tests into mathematical model parameters the solver can read.
An accurate material card is the foundation of simulation credibility — wrong material parameters make results diverge sharply from reality, leading to failed development or safety issues.
From test data to a deliverable material card — a standardised seven-step process that keeps every parameter accurate and traceable.
Select the optimum constitutive equation from material characteristics and simulation scenario
Define and execute a test programme based on material type and loading case
Stress-strain curve processing: noise removal and normalisation
optimisation-based parameter fitting against the measured curves
Feed the calibrated parameters back into simulation and compare against the original test data
Identify sensitive ranges of key parameters and assess robustness
Standard-format material card plus a parameter description report
Help with tuning and troubleshooting after the card is imported into the solver
Supports Cowper-Symonds, Johnson-Cook, Zerilli-Armstrong and other plasticity models, plus MAT_RIGID, MAT_SPRING and similar
Supports Mises and Hill48/90 yield criteria, with VUMAT/UMAT user subroutine interfaces
Supports multilinear isotropic hardening (MISO), kinematic hardening (KINH) and the Chaboche nonlinear kinematic hardening model
Parameter calibration for foam models (EPP, PU) and honeycomb structures
Composite laminate models with failure criteria (Chang-Charlie, Hashin and others)
Sampled material model — accepts user-defined stress-strain curve input, suitable for calibrating isotropic and work-hardening elastoplastic materials
Cohesive Zone Model — for structural adhesives, liners and coatings, with mixed-mode failure criteria (BK criterion, Reeder correction); used for bodyshell adhesive joints
MAT_LAMINATED_COMPOSITE_FABRIC / MAT_LAMINATED_COMPOSITE — fibre-reinforced composite models with intra-laminar failure (Hashin, Tsai-Hill, Tsai-Wu) and inter-laminar delamination, including temperature-dependent parameters
Parameter identification and calibration of non-standard constitutive models developed to a customer's specific requirement
| Capability | Test method | Data processing | Model parameters | Deliverable format |
|---|---|---|---|---|
| Quasi-static tension | ISO 527 / GB/T 1040 | Normalisation and noise filtering | Elastic modulus, yield strength, hardening curve | .k / .inp / .cdb |
| Compression testing | ASTM D6641 / ISO 604 | Displacement-force to stress-strain conversion, buckling correction | Compressive modulus, compressive strength, yield stress | .k / .inp |
| High-speed tension (strain rate) | ISO 18872 / ASTM D1822 | Stress-wave correction, displacement compensation | Cowper-Symonds / Johnson-Cook parameters | .k / .k |
| Shear testing | ISO 14130 / ASTM D5379 | Shear strain correction | Shear modulus, shear strength | .k / .inp |
| In-plane shear (IPS) | ASTM D3518 | Failure mode analysis | Shear response curves, failure criterion parameters | .k (MAT_32) |
| Three-point bending | ISO 178 / GB/T 9341 | Deflection compensation, span correction | Flexural modulus, flexural strength | .k / .inp |
| Crush testing | Customer-specific | Energy absorption curve processing | Crush force curve, peak / mean force | .k |
| Dynamic mechanical analysis (DMA) | ISO 6721 | Loss modulus / storage modulus extraction | Viscoelastic constitutive parameters (Prony series) | .k / .inp |
| Creep / relaxation | ISO 899 | Maxwell / Kelvin model fitting | Creep compliance, relaxation modulus | .k |
| GISSMO damage and failure | ISO 6603 or ASTM D3763 | Stress triaxiality / Lode angle analysis, damage variable D extraction | Damage evolution curve, failure strain mapping (FLC, FFC), fracture energy | .k |
| Moldflow — viscosity curves | Capillary rheometer / ISO 11403-3 | Log-log shear-rate vs viscosity fitting, non-Newtonian correction | Cross-WLF / Carreau model parameters (n, τ*, λ) | .udb |
| Moldflow — PVT data | Piston-type PVT tester / EOS model | Volumetric shrinkage-pressure-temperature curve fitting, Tait equation of state parameters | PVT EOS parameters (b5M, b6M, b2, b3, b4), compressibility | .udb |
| Moldflow — thermal properties | DSC / thermogravimetric analysis (TGA) | Specific heat capacity, thermal conductivity, crystallinity extraction | Cp, isotropic λ, crystallisation kinetics parameters (Avrami) | .udb |
Understand the customer's simulation scenario, target solver and accuracy requirements, then define the test and calibration programme.
Run the agreed tests and capture high-quality raw stress-strain data.
Convert the raw force-displacement curves to engineering stress-strain and clean the data.
Generate the material card, run V&V validation and deliver the complete data package.