Optimization and flowchart control in

the industry process using

Abaqus, CATIA, Moldflow with ISIGHT

integration

Ruben Guardia / Mariana Rollo

05 / 16 / 2012

Index

1-Objetive

2-Why Isight ?

3- Study Case

4-Bondary conditions

5-Isight Model

6-Component

8-Material Orientation

7-Result

Objetive

The goal of the present work is to show the implementation of anIsight optimization model. It includes an excel file, used in order to inputdata and extract results. It makes it easier for the user to introduce inputdata and obtain optimal design data.

Why Isight?

1- The continuous development of technology

2 - integrate different analysis models

3- Reduce Time

4- Reduce Cost – Important for the management.

Study Case

The piece is part of the support of a driving mirror. It was analyzed in different ways: 1-Natural Frequencies analysis 2-A static general procedure 3-Injection Simulation

Model

The material for the mirror has the following properties:

Young´s Modulus=5070 MPa

Poisson Ratio = 0,47Mass Density = 1,4 e-9 Ton/mm3

The thickness of the reinforcements in red (“Nervadura 3”), yellow(“Nervadura 2”), blue (“Nervadura 1”)and light green (“Nervadura 4”)

Will be a part of the optimization process

Nervadura 1 Nervadura 2

Nervadura 4

Nervadura 3

Boundary

Conditions

The boundary conditions are:

-Pinned (yellow circles) with U1=U2=U3=0

The loads (for the static step) are:

-Pressure (red)

Isight Model

Isight model: The model is as shown below

Components

Runs the whole model

The function of each component is as follows:

Runs the Optimization for the Abaqus model

Feeds the input data

Runs the Abaqus model

Saves the optimization results

Runs a MOLDFLOW analysis in order to get injection parameters for the optimal design

Gets the medium pressure value during the injection for a test point

Excel File

The excel file contains:

Initial thickness

Material properties

Pressure to be applied

Excel

Component

The variables are selected from the excel file shown previously and then sent to the Abaqus Component

Abaqus

Component

Selected variables for the Abaqus Analysis

Optimization

Component

Element thicknesses were restricted to have certain specific values

The Constraints are: Max_Stress < 245 MPaMAX_Displacement<3.1 mm 1st Frequency > 450 Hz

We aim to minimize thickness

Linked

Parameters

The parameters for the optimal design point are sent to the excel file

Simcode

Component

The optimal thicknesses are used to run a Moldflow analysis in order to evaluate the injection process for certain given parameters. For this purpose, a SIMCODE component who reads a .vbs script file made in Moldflow was used.

From the Moldflow analysis a table is pulled out with the pressure in a sample point with respect to time. This table is then sent to the calculator component

Simcode

Component

Calculator

Component

In the calculator component, the mean of the measured pressures is computed.

Results

Optimal design point

Results in

Excel File

Optimal Reinforcements thicknesses

Results in

Excel File

Natural frequencies for the optimal point

Results in

Excel File

Stress and maximum displacement for the optimal point

Moldflow

Results

FEM results-

Stress

FEM results- First

Natural Frequency

Isight results-

Stress vs Thickness

Isight results-

1st Nat. Freq vs

Thickness

* The shape and thickness of the part to be injected, the number of injection points, the pressure with which it is injected, the temperature at which the material enters and the injection method used. All these and other factors affecting the orientation of the material.

*When we speak of orientation of the material we have to talk about the properties and these can be inter isotropic or orthotropic.

Material Orientation

Fiber analysis and residual stressesAnalysis isotropic materials without residual stresses

Material Orientation

Fiber analysis and residual stressesAnalysis isotropic materials without residual stresses

Material Orientation

Thank you for your time

Any Questions?