Transcript AN OVERVIEW OF COMPUTER AIDED ENGINEERING/DESIGN (CAE/D) SYSTEMS AND DATA ROBERT E.

AN OVERVIEW OF COMPUTER AIDED
ENGINEERING/DESIGN (CAE/D) SYSTEMS AND DATA
ROBERT E. FULTON
PROFESSOR OF MECHANICAL ENGINEERING
DIRECTOR ATLANTA ELECTRONIC COMMERCE RESOURCE CENTER
GEORGIA INSTITUTE OF TECHNOLOGY
ATLANTA, GEORGIA
[email protected]
404-894-9514
PRESENTED AT
OPEN SOURCE SOFTWARE FRAMEWORK
FOR ORGAN MODELING
AND SIMULATION
LISTER HILL CENTER, NATIONAL LIBRARY OF MEDICINE
BETHESDA, MD
JULY 23, 2001
OUTLINE
ENGINEERING INFORMATION MANAGEMENT
INTRODUCTION TO STEP STANDARD
EXAMPLE OF RESEARCH ON LINKING ANALYSIS AND GEOMETRY MODELS
GEORGIA TECH CENTER FOR:
INFORMATION TECHNOLOGY FOR INTEGRATING MANUFACTURING
ENTERPRISE SYSTEMS (i TIMES)
CONTACTS:
DIRECTOR: DR. FARROKH MISTREE
PHONE: 404-894-8412
[email protected]
TECHNICAL DIRECTOR: DR. RUSSELL PEAK
PHONE: 404-894-7572
[email protected]
CHARACTERISTICS OF ENGINEERING DESIGN
LARGE TEAMS
MULTIDISCIPLINARY
DIVERSE TEAMS
TODAY’S REQUIREMENTS INCLUDE FASTER, BETTER,
CHEAPER PRODUCTS BUILT BY DISTRIBUTED TEAMS
REQUIRES NUMEROUS COMPUTER BASED TOOLS AND
PRODUCES ENORMOUS DATA SETS
INFORMATION MANAGEMENT STRATEGIES ARE ESSENTIAL
RESULTS
PHYSICAL PRODUCT
INFORMATION PRODUCT
COMPUTER BASED ENGINEERING SYSTEMS
REQUIREMENTS
ELECTRONICS
STRUCTURES
FLUID
MECHANICS
NC
MACHINING
INTEGRATED DATA BASE
GEOMETRY
MATERIALS
LOADS, STANDARDS
SPECS, RESULTS
ETC., ETC., ETC.
THERMAL
MECHANICS
STABILITY
&
CONTROL
ETC
TYPICAL CAD SYSTEMS
GEOMETRY:
PRO-E, CATIA, UNIGRAPHICS, IDEAS, ETC.
VARIATIONS IN THEORY, MODELING APPROACHES
USER FEATURES, INTERFACE CAPABILITIES
STRUCTURAL ANALYSIS:
NASTRAN, ANSYS, IDEAS, ABAQUS, ETC
VARIATIONS IN THEORY, FINITE ELEMENT MODELS,
USER FEATURES, ETC.
THERMAL ANALYSIS:
INCLUDED IN MOST STRUCTURAL ANALYSIS
SYSTEMS AND HAS SIMILAR CHARACTERISTICS
FLUID MECHANICS:
WIDE VARIETY OF SYSTEMS WITH DIFFERENT
STRATEGIES FOR SUBSONIC, TRANSONIC AND
SUPERSONIC FLOW
CRITICAL PRODUCT DATA MANAGEMENT NEED
STANDARD INFORMATION MODELING APPROACH
TO INTEGRATE PRODUCT LIFECYCLE DATA
MODERATELY HETEROGENEOUS GEOMETRY SYSTEMS
CATIA
PRO-E
IDEAS
HIGHLY HETEROGENEOUS ANALYSIS SYSTEMS
DIFFERENT DATA STRUCTURES, THEORIES, AND IDEALIZATIONS
STRUCTURAL MODEL
THERMAL MODEL
MOST CAD SYSTEMS OWNED BY DIFFERENT VENDORS
MULTIPLE TEAMS, LONG DEVELOPMENT TIMES
PRODUCT DEMANDS FOR BETTER, FASTER, CHEAPER DESIGNS
ENGINEERING INFORMATION MANAGEMENT APPROACH
DEVELOP A STANDARD FOR EXCHANGE OF PRODUCT MODEL DATA (STEP)
10 + YEARS OF WORK, THOUSANDS OF PARTICIPANTS
INTERNATIONAL STANDARDS, SOME APPROVED, OTHERS IN WORKS
BUILT ON OBJECT AND SOFTWARE AGENT TECHNOLOGY
USES AN INFORMATION MODELING STANDARD FOR DEFINING
STEP MODELS (EXPRESS)
CONTAINS BOTH GRAPHICS AND PROGRAMMABLE SYNTAX FORMS
A SIMPLE VIEW OF STEP
DATA MODELING STANDARD
(EXPRESS)
LAYERS OF BUILDING
BLOCKS SUCH
AS GEOMETRY,
CONCEPTS,
LINKAGES, S/W AGENTS,
ETC.
SPECIFIC DISCIPLINE ORIENTED
APPLICATION PROTOCOLS
API
AP 203
GEOM/CONFIG
MANAGEMENT
AP 210
ELECTRONICS
ETC., ETC.
STEP STATUS
CORE CAPABILITIES IN PLACE
MANY VENDORS STEP CERTIFIED
INTERNATIONAL TEAM CONTINUING DEVELOPMENT
SOLID BUILDING BLOCKS AVAILABLE FOR EXTENSIONS
EXTENSIVE TECHNICAL/COMPUTER FOUNDATION IN PLACE
KEY ASSOCIATIONS IN PLACE
ISO/TAG STANDARDS GROUP
US PRODUCT DATA ASSOCIATION (US PRO)
SUPPORTING DEVELOPMENT AND DISTRIBUTION OF STEP
PDES, INC. INDUSTRY GROUP EVALUATING AND APPLYING STEP
KEY US GOVERNMENT AGENCIES SUPPORTING STEP
NIST/ NASA/DOD
Missing Today:
Explicit Design-Analysis Associativity
Detailed Design Model
Analysis Model
(with Idealized Features)
G
idealizations
K3 = f (r1,b, h)
fse =
P
2pr0te
fbe =
C1
P
2
hte
Channel Fitting Analysis
“It is no secret that CAD models are driving more of today’s product development
processes ... With the growing number of design tools on the market, however, the
interoperability gap with downstream applications, such as finite element analysis,
is a very real problem. As a result, CAD models are being re-created at
unprecedented levels.”
Ansys/ITI press Release, July 6 1999
http://www.ansys.com/webdocs/VisitAnsys/CorpInfo/PR/pr-060799.html
STEP AP 210
PWA/B Design Information
•
•
•
•
•
Physical
Component Placement
Bare Board Geometry
Layout items
Layers non-planar,
conductive & non-conductive
Material product
Geometry
• Geometrically Bounded
2-D Shape
• Wireframe with Topology
• Advanced BREP Solids
• Constructive Solid Geometry
Product Structure/
Connectivity
• Functional
• Packaged
Requirements
• Design
• Allocation
• Constraints
• Interface
•
•
•
•
•
•
Part
Functionality
Termination
Shape 2D, 3D
Single Level Decomposition
Material Product
Characteristics
•
•
•
•
•
•
•
Configuration Mgmt
Identification
Authority
Effectivity
Control
Requirement Traceability
Analytical Model
Document References
Technology
• Fabrication Design Rules
• Product Design Rules
Analysis Integration Challenges:
Information Diversity
“Manufacturable”
Description
STEP
AP210
Environmental
Conditions
“Analyzable”
Description
STEP
AP220
lamination
temperature =
150oC
Specification
Semantics
“PWB should
withstand lamination”
“Warpage < 0.005 when
board is heated from 25
to 150oC”
B
Idealizations
Multi-Fidelity, Multi-Usage
Idealizations
Analysis Models
Solder
Joint
Deformation
Idealized
Views
Multiple Uses
Design Model
2-D bounding box
PWA
Cooling
Multi-Fidelity
Idealizations
Solder
Joint
Deformation
Multiple Uses
3-D bounding box
PWA
Cooling
X-Analysis Integration Techniques
a. Multi-Representation Architecture (MRA)
3
Analyzable
Product Model
b. Explicit Design-Analysis Associativity
Design Model
4 Context-Based Analysis Model
PWA Component Occurrence
3 APM
APM
2 Analysis Building Block
Printed Wiring Assembly (PWA)
1 Solution Method Model
CBAM
ABB
Component
Solder
Joint
material
body 1
body4
Solder Joint
Solder Joint Plane Strain Model
4 CBAM
C
L

h1
base: Alumina
Epoxy
ABBSMM
PWB
body3
APM ABB
core: FR4
Plane Strain Bodies System
2 ABB

G total height, h c
Component
Solder
Joint
T0
Component
G linear-elastic model
G primary structural
SMM
APM ABB
Analysis Model
body 1
body 4
body
body 2
body 2
PWB
Printed Wiring Board (PWB)
Design Tools
4 CBAM
Analysis Module Catalogs
Analysis Procedures
sj
solder joint
shear strain
range
component
occurrence
c

3 APM

component
total height
hc
linear-elastic model
[1.1]
total thickness
Ubiquitous Analysis
Commercial
Design Tools
Product
Model
(Module Usage)
Selected Module
Solder Joint Deformation Model
MCAD
1.25
length 2 +
pwb
Idealization/
Defeaturization
ECAD
Component
Solder Joint
X = design, manufacture, ...
solder joint
solder
hs
linear-elastic model
[1.1]
detailed shape
[1.2]
linear-elastic model
[2.1]
Ts
average
Ansys
CAE
PWB
APM  CBAM  ABB SMM
primary structural material
Tc
Ls
[1.2]
rectangle
Commercial
Analysis Tools
Plane Strain
Bodies System
T0
Lc
Physical Behavior Research,
Know-How, Design Handbooks, ...
Abaqus
1 SMM
deformation model
approximate maximum
inter-solder joint distance
primary structural material
ABB SMM
2 ABB
Fine-Grained Associativity
Ubiquitization
(Module Creation)
3
plane strain bodyi , i = 1...4
geometryi
materiali (E,  ,  )
Informal Associativity Diagram
Solution Tools
c. Analysis Module Methodology
To
bilinear-elastoplastic model
[2.2]
a
L1
h1
stress-strain
model 1
T1
L2
h2
stress-strain
model 2
T2
geometry model 3
stress-strain
model 3
T3
 xy, extreme, 3
T sj
Constrained Object-based Analysis Module
Constraint Schematic View
 xy, extreme, sj
Flexible High Diversity
Design-Analysis Integration
Design Tools
Electronic Packaging Examples: PWA/B
Modular, Reusable
Analysis Modules (CBAMs)
Template Libraries
of Diverse Mode & Fidelity
y
mv6
reference temperature, To
E
T = T L To
A
ts1
ts2

s
Sleeve 1
Shaft
Sleeve 2
smv1
ds1
force, F
area, A
ECAD Tools
Mentor Graphics,
Accel*
A
r4
F
A
Leff
linkage
=
mv4
L
F
E, A, 
T, ,  x
One D Linear
Elastic Model
(no shear)
mv5
sr1
temperature, T
L
Lo
F
material model
youngs modulus, E
cte, 
ds2
e
T
t


elastic strain, e
mv2
thermal strain, t
mv3
strain,
mv1
effective length, Leff
r2
undeformed length, Lo
start, x1
end, x2
cross section:
effective ring
L = L  Lo
condition
r1
L = x2  x1
material
=
polar moment of inertia, J
L
r3 ro
outer radius,
L
linear elastic model
Margin of Safety
(> case)
allowable
al3
total elongation,L
length, L
allowable stress
twist mos model
al2a
al2b
shear modulus, G
reaction
deformation model
Torsional Rod
stress,al1

temperature change,T
mode: shaft torsion
Lo

1
2
J
r

G

T
stress mos model
allowable
twist
Margin of Safety
(> case)
allowable
actual
actual
MS
MS
STEP AP210‡
GenCAM**,
PDIF*
PWB Layup Tool
XaiTools PWA-B
Analyzable
Product Model
XaiTools
PWA-B
Solder Joint 1D,
Deformation* 2D,
3D
PWB
Warpage
1D,
2D
Laminates DB
Materials DB
‡ AP210 DIS WD1.7
* = Item not yet available in toolkit (all others have working examples)
PTH
1D,
Deformation 2D
& Fatigue**
** = Item available via U-Engineer.com
XaiTools Analysis Tools
PWA-B
General Math
Mathematica
FEA Ansys
SUMMARY
PRODUCT DATA AND HUMAN DATA HAVE MANY SIMILAR CHARACTERISTICS
LARGE, COMPLEX, EVOLVING, MULTIDISCIPLINARY, GEOMETRY/
ANALYSIS/EXPERIMENTALLY BASED, MULTIMEDIA, ETC.
PRODUCT INFORMATION MANAGEMENT HAS MADE SIGNIFICANT PROGRESS
SINCE 1970’S
DIGITAL HUMAN STRATEGY NEEDS TO USE STEP PRODUCT DATA MODELING
AS A STARTING POINT FOR FUTURE NEEDS