ANSYS Mechanical

ANSYS Mechanical software is a comprehensive FEA analysis (finite element) tool for structural analysis, including linear, nonlinear and dynamic studies. The engineering simulation product provides a complete set of elements behavior, material models and equation solvers for a wide range of mechanical design problems. In addition, ANSYS Mechanical offers thermal analysis and coupled-physics capabilities involving acoustic, piezoelectric, thermal–structural and thermo-electric analysis.

image of efficient computation of large problems, such as detailed model of combine, with ANSYS Mechanical software

ANSYS Mechanical allows efficient computation of large problems, such as this detailed model of a complete combine.

Courtesy CLAAS.

 mage of Drogue parachute system analysis with inset submodel of the critical area using nonlinear material properties

Drogue parachute system analysis with inset submodel of the critical area using nonlinear material properties

Courtesy CTC.

Loading Content. Please wait

Superior CAD Interface & Robust Meshing Superior CAD Interface & Robust Meshing

Existing native CAD geometry can be used directly with ANSYS structural analysis software — with no translation, no IGES and no intermediate geometry formats. ANSYS has provided native bidirectional integration with the most popular CAD systems for more than a decade. Integration directly into the CAD menu bar makes it very simple to launch world-class simulation directly from a CAD system.

Since the ANSYS geometry import mechanism is common to all CAD systems, the user has the flexibility to work within a single common simulation environment while using multiple CAD packages.

image of large cell phone assembly for explicit drop test analysis Automatic body-by-body meshing, large cell phone assembly for explicit drop test analysis

image of HEX mesh of complex automotive brake rotor assembly All HEX mesh of complex automotive brake rotor assembly
Courtesy PTC.

automatic tetrahedral mesh for complex engine block High-quality automatic tetrahedral mesh for complex engine block
Courtesy PTC.

ANSYS supports the following CAD systems: 

Autodesk® Inventor® Pro/ENGINEER® Unigraphics®
Autodesk® Mechanical Desktop Solid Edge® CoCREATE Modeling™
Autodesk® Inventor® Professional Stress SolidWorks® SpaceClaim®
CATIA® V4 and V5    

 

In addition, the ANSYS Workbench environment supports neutral format files such as IGES, Parasolid®, ACIS® (SAT) and STEP, which enable the use of any CAD system with the capability to export to any of these formats.

ANSYS provides a wide range of highly robust automated meshing tools — from tetrahedral meshes to pure hexahedral meshes, inflation layers and high-quality shell meshes. Mesh settings like surface or edge sizing, sphere of influence, defeaturing tolerances and more can be set by the user.

Auto Contact Detection for Assemblies Auto Contact Detection for Assemblies

Once the geometry has been imported, ANSYS structural software tools automatically detect and perform setup for contacts or joints between parts of an assembly. The contact settings and options can be modified, and additional manual contact definitions can be added. Joints for flexible/rigid dynamics are automatically detected. Each contact or joint is easily identified using the graphical tools provided in the environment.

Automated detection of contacts after geomtery import
Automated detection of contacts is performed upon geometry import.
Automated detection of contacts is performed upon geometry import.
Courtesy Pratt & Miller.

Comprehensive Element Technology Comprehensive Element Technology

The current generation of ANSYS element technologies provides rich functionality with a consistent theoretical foundation coupled with the most advanced algorithms. ANSYS structural analysis software provides a large library of elements including beam, pipes, shells, solids, 2-D planar/axisymmetric and 3-D axisymmetric elements, which have wide applicability that includes composites, buckling and collapse analysis, dynamics analysis and nonlinear applications. The library also includes special-purpose elements like gaskets, joints, interface elements and layered elements for composites structures.

These elements offer superior performance and functionality. They also support advanced material models and methods like remeshing/rezoning, fracture mechanics and coupled fields while also accommodating distributed solver processing needs.

Solid Elements

2-D quad/tri

3-D hexa/tetra/wedge/pyramid

Layered solids

Solid shell

4-node tetra (stabilized)

 

Coupled-Field Elements

Pore pressure elements

Fluid–thermal

Magnetostructural

Thermal–electric

Hydrostatic fluid elements

Shell Elements

Lower/higher order

Layered shells

 

Beam Elements

Multi-material beam analysis

Beam cross section definition

Special Elements

Rebars/reinforcements

Links/pipes/elbow

Springs/joints

Cohesive zone

Gaskets

User elements

   

Extensive Library of Material Models Extensive Library of Material Models

It is vital to understand and accurately characterize material behavior while designing or analyzing an engineering application. ANSYS provides a vast library of mathematical material models that aid users in simulating various kinds of material behavior, such as elasticity, visco-elasticity, plasticity, viscoplasticity, cast iron plasticity, creep, hyperelasticity, gaskets and anisotropy. These constitutive models can be used to simulate various kinds of materials: metals, rubber, plastics, glass, foam, concrete, bio-tissues and special alloys. In addition, to aid in finding parameters for these materials models, ANSYS provides a set of curve-fitting tools.

The virtual crack closure technique (VCCT) allows computation of energy-release rates for two-dimensional continuum and 3-D continuum elements. Two-D elements also support crack growth simulation.

material models include shape memory for stent analysis
material models include shape memory for stent analysisMany material models are available, such as shape memory allow for stent analysis.

 

Material Models

Isotropic/orthotropic elasticity

Multilinear elasticity

Hyperelasticity

Anisotropic hyperelasticity

Bergstrom–Boyce

Mullins effect

Plasticity

Viscoelasticity

Viscoplasticity

Creep

 
Other Models
Cast iron plasticity

Drucker–Prager

Shape memory alloy

Swelling material model
Gasket material
Concrete
Gurson damage
USERMAT

Advanced Numerical Methods for Nonlinear Problems Advanced Numerical Methods for Nonlinear Problems

With a solid foundation of element and material technology, ANSYS structural analysis software offers various advanced modeling methods for different kinds of applications, including:

Modal Cyclic symmetry Fracture mechanics Submodeling
Harmonic Delamination Adaptive meshing Substructuring
Spectrum Composites failure 2-D rezoning Element birth and death
Rotordynamics Flexible multibody dynamics Component mode synthesis Topology optimization

 

In addition, ANSYS finite element analysis (FEA) tools offer advanced capabilities that enable simulation of a variety of physics phenomena, such as thermal–stress, electromechanical, structural–acoustics, mass diffusion and simple thermal–fluid analysis.

Nonlinear Toolset

Nonlinear convergence controls

Contact diagnostics

Nonlinear diagnostics

2-D rezoning

Nonlinear stabilization

Partial solve

Implicit explicit transfer

Element birth and death

Initial stressstrain

Linear perturbation

Powerful Solver Capabilities Powerful Solver Capabilities

ANSYS structural analysis software offers a large library of out-of-the box equation solvers. The library contains the sparse direct solver,  preconditioned conjugate gradient (PCG) iterative solver, Jacobi conjugate gradient (JCG) solution and more. In addition, the distributed versions of PCG, JCG, and sparse solvers are available for use in large-scale computing via parallel processing. By combining our parallel algorithms with the power of GPUs, you can further reduce the solution time required for large models.

Variational technology from ANSYS allows accelerating computation of normal modes for cyclic structures, especially when a large number of harmonic indexes are required. Frequency sweeps such as those found in harmonic analyses benefit from variational technology as well. Typical speedup factors range from three to 10 times. Transient thermal runs and certain classes of nonlinear structural transient problems are computed in a shorter time using these same principles.

Solver Type
Direct Sparse
Iterative PCG
Distributed Memory Dsparse
DPCG


 

image of solder balls modeled with 4M DOF for creep strain analysis

chart of multiple GPUs used on nodes of a cluster to reduce computing time

Multiple GPUs can be used on nodes of a cluster to reduce computing time. For example, solder balls were modeled with 4M DOF for creep strain analysis.

Results courtesy MicroConsult Engineering, GmbH.

Advanced Post-Processing Advanced Post-Processing

ANSYS FEA software provides a comprehensive set of post-processing tools to display results on models as contours or vector plots to provide summaries of the results (like min/max values and locations). Powerful and intuitive slicing techniques allow the user to get more detailed results over given parts of  geometries. All results can be exported as text data or to a spreadsheet for further calculations. Animations are provided for static cases as well as for nonlinear or transient histories. Any result or boundary condition can be used to create customized charts.

image of contour plots on bodies Contour plots on bodies

image of simulation results, which can be displayed on any part of the geometry Results can be displayed on any part of the geometry.

image of path plot Path plot

Reporting Reporting

ANSYS software lets engineers explore their designs in multiple ways. All the results must then be efficiently documented. ANSYS provides instantaneous report generation to gather all technical data and pictures of the model in a convenient format (HTML, Microsoft® Word™, Microsoft® PowerPoint™).

image of reporting capabilities with ANSYS structural analysis software

Coupling Physics Coupling Physics

To accurately model a product, you must consider its environment. Will the product experience thermal loads that affect the structure? Will it be part of a system controlled by electric or piezoelectric components?
ANSYS tools enable you to compute thermal–structural, thermal–electric, piezoelectric and acoustics impacts. Strong couplings use coupled elements that carry all necessary degrees of freedom.

image of simulated coupled effects: plasticity-induced heating used in friction-stir welding operations
image of simulated coupled effects: plasticity-induced heating used in friction-stir welding operations Specific element formulations allow you to simulate coupled effects such as plasticity-induced heating used in friction-stir welding operations (top) or moisture effects in PBGA (bottom).
image of coupled element formulations used to perform acoustics simulation of speakers
image of coupled element formulations used to perform acoustics simulation of speakers
image of coupled element formulations used to perform acoustics simulation of speakersCoupled element formulations are used to perform acoustics simulation of speakers.


 

Solver Customization & Scripting Solver Customization & Scripting

Customization capabilities through user elements, user materials and scripting using ANSYS Parametric Design Language (APDL) provide flexibility and extend the capability of applications for structural analysis solutions.

APDL is the foundation for accessing sophisticated features of the structural solver. In addition, engineers can use APDL to automate common tasks, build their own parametric models, perform design optimization, construct adaptive meshing, etc., as it offers many convenient features such as parameters, macros, branching, looping, and repeating and array parameters that can be used in day-to-day analyses.