Club Zébulon - PSL

Seminar Z-club, Evry June 16 2011Seminar Z-club, Evry June 16 2011

Club ZébulonClub Zébulon

Nikolay Osipov

Group Val

CDM MINES-PARISTECH

June 16, 2011


Z-develsZ-devels

NW Numerics, Inc, USA1 pers

Group VALORISATION

ARMINES4(5) pers

Group Numerical mechanics

ONERA6 pers

Commun projects

Shared developments

Commun code (projet svn). More than 1 Millon

of lines of code


Z-communityZ-community



ONERA6 pers

GroupVALORISATION

ARMINES4(5) pers

Centre des Matériaux ENSMP

Research groups ONERA

Commun projects

Shared developments

Commun code (projet svn). More than 1 Millon

of lines of code

Research groups LMT

Research groups Mines Saint-Etienne


Z-worldZ-world



ONERA6 pers

GroupVALORISATION

ARMINES4(5) pers

Centre des Matériaux ENSMP

Research groups ONERA

Research groups LMT

Research groups Mines Saint-Etienne

SIMAPINP Grenoble

LMS

Université de Bourgogne

INSA-Rouen

ENS-Géologie

EDFEPFL

MIT

Penn State

Tortuetec

SPbSTU Russia

Universität Leoben

. . .


Z-set existing customer baseZ-set existing customer base

• Z-set products have been on the market for 10 years and has continuously grown in scope

• Almost exclusively “Enterprise” class CAE departments – mostly ABAQUS users

• Generally each client has 1-2 power users – many others in general application use

• Experience shows deployment to a wide scale is feasible for general CAE use

• In almost all cases Transvalor or NW Numerics provide a high level of customization


Calibration of a visco-plastic behavior and fatigue life criterion to apply in calculation

of an exhaust manifold component

Z-set - industrial softwareZ-set - industrial software


IntroductionIntroduction

M4828 Austenitic steel

temperature fields resulting from a thermal shock cycle comprising:

acceleration - full throttle - deceleration

measured nodal temperatures


Experimental databaseExperimental database









Temperatures: 20°C, 250°C, 550°C, 650°C and at 750°C.

•Plastic strain•Time dependent plasticity•Stress relaxation due to viscous effects (very pronounced at high temperature)

time

stre

ss


ClassicalClassical life cycle estimation life cycle estimation toolchaintoolchain

Matl modelThermo-Mechanical

FEM AnalysisFatigue Model

Life cycle computation


ClassicalClassical life cycle estimation life cycle estimation toolchaintoolchain




insufficiency of the matl. models developed in commercial software packages difficulties of integration


Z-setZ-set life cycle estimation life cycle estimation toolchaintoolchain




Elasto-visco-plastic matl. model• elasticity

• plasticity

• criterion

• flow rule

• hardenings

• ...

• Parameters fitting.

GUI ZsimOpt


• elasticity

• plasticity

• criterion

• flow rule

• hardenings

• ...


GUI ZsimOpt


Elasto-visco-plastic matl. model

Z-mat interface to Abaqus

• cyclic loading

• stress-strain analysis

• plastic deformation

• creep





• elasticity

• plasticity

• criterion

• flow rule

• hardenings

• ...


GUI ZsimOpt




• cyclic loading



• creep




Damage evaluation at high temperatures

• fatigue damage

• creep damage

• creep/fatigue interaction...


GUI ZsimOpt





• cyclic loading



• creep

Damage evaluation at high temperatures• elasticity

• plasticity

• criterion

• flow rule

• hardenings

• ...


GUI ZsimOpt

• fatigue damage

• creep damage



GUI ZsimOpt

Z-post interface to Abaqus

• damage evaluation

• life cycle estimation





Couple of words about Z-matCouple of words about Z-mat

• Elasticity, hyperelasticity• Plasticity, viscoplasticity• Linear or non-linear isotropic

and kinematic hardening• Crystal plasticity• Ductile models• Visco-elasticity• Multi-mat• User extensible

Z-mat object-oriented design

Behavior

Elasticity

Ther

mal

stra

in

Potential

Criterion

Flow

Isotropic hardening

Kinematic hardeningKinematic hardening

Models for industrial applications

• Aeronautics

• Car manufacturers

• Automotive equipment suppliers

• Energy

• Metals manufacturers

• Polymer, Rubber, Glass industry

Many models


Typical assembly for Typical assembly for viscoplasticityviscoplasticity

Behavior

Elasticity

Thermal strain

Potential

Criterion

Flow

Isotropic hardening

Kinematic hardening

Kinematic hardening


Z-mat à la carteZ-mat à la carte


Calibration strategy and matl Calibration strategy and matl filefile


ZsimOpt interface. ZsimOpt interface. Experimental databaseExperimental database

• load experimental curves

• data manipulation

• filtering

• smoothing


ZsimOpt interface. ZsimOpt interface. OptimizationOptimization

instrumentation panel

• templates management

• simulations and variables control

• choice of optimisation strategy

•optimisation project management


Isothermal optimization. Isothermal optimization. T=650°CT=650°C

750°C


Anisothermal optimizationAnisothermal optimization

•plotting •analysis •optimization


FE computations


Z-mat - External FE codes interfacesZ-mat - External FE codes interfaces

SAMCEF

MARC


FE Results. Native viewerFE Results. Native viewer

Von Mises stress isocontour plots (engine shutdown)


FE Results. Native viewerFE Results. Native viewer

Accumulated plastic strain at the end of the 4th cycle


Post-processingPost-processing

• Principles of Z-post

• Example of Life cycle estimation post-processing


Principles of Z-post. Data Principles of Z-post. Data manipulationmanipulation

• Selection of zones (nodes, Gauss points, elements, increments)

• User functions or scripts

• Graphical post-processing

• Available interfaces

Abaqus Ansys LS-DYNA

DATA WRITER

DATA READER

PROCESSES

PROCESSES

PROCESSES

D A

T A ****post_processing

***data_source odb **open results.odb ***local_post_processing **file integ **output_number 1-10 **elset nickel **process trace sig ***global_post_processing **process average_in_element sigii ***local_post_processing **process function msig11 sig11+(1./3.)(ave_sigii - sigii); ***global_post_processing **process node_extrapolation *list_var msig11 ***data_output odb *file results_abaqus.odb****return


Z-post. Available featuresZ-post. Available features

• Post- local

Generic:fmin, fmax and min, max (temporary)Norm, Function, Format, TriaxialityEigen...

Invariants:Mises, Trace, Deviator, . . .

Durability analisys:CreepHCF : sines, crossland, dang-vanLCF : senitoglu, onera, manson-coffin, swtTMF : cumulation (non-linear)Rainflow multiaxialRange multiaxialDuctile fracture...user extensions

• Post- global

Averaging (around, in element, in elset )Weibull, Beremin, BatdorfSelective intCopymin, max...user extensions


Fatigue life estimation. Fatigue life estimation. Experimental databaseExperimental database


Fatigue life model calibrationFatigue life model calibration


ZsimOpt Interface. MultiplotZsimOpt Interface. Multiplot


Fatigue life computationFatigue life computation


ConclusionsConclusions


Z-mat interface to Abaqus• cyclic loading



• creep

Damage evaluation at high temperatures

• elasticity

• plasticity

• criterion

• flow rule

• hardenings

• ...

• Parameter's fitting.

GUI ZsimOpt

• fatigue damage

• creep damage


• Parameter's fitting.

GUI ZsimOpt

Z-post interface to Abaqus

• damage evaluation

• life cycle estimation

Matl modelThermo-Mechanical FEM Analysis

Fatigue ModelLife cycle computation

• Z-set provides powerful models and tools for simulation of strongly non-linear material phenomena• User friendly graphical interfaces for successful simulation and optimization

• Easy interfacing and integration within existing industrial software suites

Documents

Club Zébulon - PSL