ansys 15.0 structural mechanics update

2013 ANSYS, Inc. November 25, 2013

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ANSYS Release 15.0 Structural Mechanics Update

December 2013


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Efficient handling of large models


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Reducing Meshing Time For Assemblies

As simulations involve always more complex models made of dozens, hundreds of parts, sequentially meshing all parts is a time consuming process.


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Meshing efficiency has been greatly improved to provide up to 4x serial speedup and up to 27x parallel speedup for structural models

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14.5 15 Serial 15 Parallel (12 Cores)Speed (Normalized)


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Automated hex meshing saves hours of manual work by removing the need to manually slice the geometry


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Filtering helps simplify the tree view to only display necessary parts of the model


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Summary table display a text summary for all results to quickly check long lists of results at once


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Model Assembly Allows Reuse of Legacy Model and Building of Complex Assemblies


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With R15 FE Model can be imported and combined as the starting point of a simulation


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Multiple WB systems can also be combined to combine Geometry, Mesh and Named Selections


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Composites


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Solving the challenges of the simulation of composites products

carbon.at

americascup.com

The simulation of composites requires complex material properties, efficient processes for defining layups, orientations or draping effects as well as efficient and accurate evaluation of state-of-the-art failure criteria and through thickness results.


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Sub-modeling techniques are useful to create a local 3D model of any part of a composites structure, reducing the computational cost while improving the local accuracy of the results

Global Results

SHELL

SOLID Local results


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Enhanced Interlaminar Shear Stress for Solid Composites increases 3D models accuracy

Solid Stack 3 elements Layup Result (solid185)

ACP: Recomputed stresses


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ANSYS Composite PrepPost now provides and easy definition of interface layers for the computation of delamination


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CDM-Based Progressive Damage provides ultimate failure analysis for less conservative designs.

Start of damage (layer 1)

Progressed damage (layer 1)

Progressed damage (layer 3)


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Thermal support for solid composites allows thermal induced stress calculations

Thermal solid composites are now supported in models with Imported Layered Sections.


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Importing External Data in Structural Analyses


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Linking multiple physics through point cloud data

For many companies, multiphysics simulation mean transferring data from one physics to the other using text files with point cloud data. The process needs to be efficient to deal with a variety of data types, misalignment or density differences between the point cloud and the actual mesh.


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Velocity Loads can be imported in a Harmonic Analysis allowing uncoupled acoustics analyses


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2D to 3D submodeling allows to compute local detailed results that are not captured using a surface model


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Contact analysis


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Fast method for bolt thread analysis without detailed geometry reduces computation time

True Thread Simulation Bolt Section Method

10 times faster!

smax= 514.9 smax= 514.8


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New contact property allows the analysis of wear between sliding parts to predict the worn shape of a product

Wear

Pressure


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Dynamics


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New Proprietary Distributed Eigensolver Accelerates Computation of Eigenmodes and Frequencies

2 Mdofs - 40 modes

2.55x speed-up compared to Lanczos-Block on 8 cores

New subspace solver keeps scaling after 12 cores

Lanczos-Block does not scale above 12 cores

Model has 2.5 Mdofs - 100 modes


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Mode-superposition method accelerates the computation of harmonic results for cyclic and unsymmetric models

2.1x speed-up

243864 degrees of freedom, 14 modes


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Robust nonlinear analysis


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Providing a robust solution for complex nonlinear problems

A robust structural simulation tool is required to address challenges posed by very large deformations of rubber seals or instabilities such as buckling of slender structures.


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Nonlinear adaptive meshing help solve large deformations models by splitting the mesh in sensitive areas


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Newly implemented arclength solution provides more robustness when dealing with unstable phenomena

Load versus disp


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Material models


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Accurately modeling the cyclic behavior of metallic parts for life prediction requires to combine hardening/softening as well as cyclic creep effects

R15 implements a solution that mixes implicit Creep with Chaboche Kinematic Hardening. Curve fitting for the kinematic hardening is also available.


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Shape Memory Alloy materials can be used for beam structures, for faster modeling and computation of thin models such as stents

Beam188 Solid185

Total Solution Time BEAM188 : SOLID185=1:4


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VCCT based Crack growth simulation is now supported in Mechanical to perform delamination based crack analysis


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T-stress helps predict stability and whether the crack will deviate from the original plane

* Stress intensity factor K and the elastic T-stress for corner cracks L.G. ZHAO, J. TONG and J. BYRNE


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High Performance Computing


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General solver improvements increase scalability of structural solutions

Coupled Structures/Acoustics computation 864628 elements, 382648 nodes


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New licensing simplifies the use of GPU boards as each HPC task can enable either a CPU core or a GPU socket

New policy applies to ANSYS HPC, ANSYS HPC Pack, ANSYS HPC Workgroup, and ANSYS HPC Enterprise licenses


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HPC speeds-up explicit dynamics up to 10x on 16 core

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Number of cores


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And there is much more


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check the Release Notes!


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Think also of the Technology Demonstration Guide

ansys 15.0 structural mechanics update

Documents

ansys release

ansys composite preppost

composites structure

complex models

structural models

thickness results

d models accuracy solid

progressed damage layer