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 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: TECHNICAL DIRECTOR: DR. RUSSELL PEAK PHONE:

CHARACTERISTICS OF ENGINEERING DESIGN LARGE TEAMS MULTIDISCIPLINARY 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 PHYSICAL PRODUCT INFORMATION PRODUCT RESULTS DIVERSE TEAMS

COMPUTER BASED ENGINEERING SYSTEMS INTEGRATED DATA BASE GEOMETRY MATERIALS LOADS, STANDARDS SPECS, RESULTS ETC., ETC., ETC. REQUIREMENTS ELECTRONICS STABILITY & CONTROL ETC STRUCTURES FLUID MECHANICS NC MACHINING THERMAL MECHANICS

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-EIDEAS 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

e se tr P f 0 2   2 1 e be ht P Cf  ),,( 13 hbrfK  Missing Today: Explicit Design-Analysis Associativity Analysis Model (with Idealized Features) Detailed Design Model 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 idealizations  No explicit fine-grained CAD-CAE associativity inconsistency little automation little knowledge capture

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 Part Functionality Termination Shape 2D, 3D Single Level Decomposition Material Product Characteristics Configuration Mgmt Identification Authority Effectivity Control Requirement Traceability Analytical Model Document References Product Structure/ Connectivity Functional Packaged Technology Fabrication Design Rules Product Design Rules Requirements Design Allocation Constraints Interface

Analysis Integration Challenges: Information Diversity Environmental Conditions Specification Semantics Idealizations “Manufacturable” Description “Analyzable” Description “PWB should withstand lamination” “Warpage < when board is heated from 25 to 150 o C” lamination temperature = 150 o C STEP AP220 STEP AP210

Multi-Fidelity, Multi-Usage Idealizations Design Model Multi-Fidelity Idealizations 2-D bounding box 3-D bounding box Multiple Uses Solder Joint Deformation Analysis Models PWA Cooling Solder Joint Deformation PWA Cooling Multiple Uses Idealized Views

X-Analysis Integration Techniques a. Multi-Representation Architecture (MRA)b. Explicit Design-Analysis Associativity c. Analysis Module Methodology X = design, manufacture,...

Flexible High Diversity Design-Analysis Integration Electronic Packaging Examples: PWA/B Analysis Modules (CBAMs) of Diverse Mode & Fidelity Design Tools Laminates DB FEA Ansys General Math Mathematica Analyzable Product Model XaiTools PWA-B XaiTools PWA-B Solder Joint Deformation* PTH Deformation & Fatigue** 1D, 2D 1D, 2D, 3D Modular, Reusable Template Libraries ECAD Tools Mentor Graphics, Accel* Analysis Tools PWB Warpage 1D, 2D Materials DB PWB Layup Tool XaiTools PWA-B STEP AP210 ‡ GenCAM**, PDIF* ‡ AP210 DIS WD1.7 * = Item not yet available in toolkit (all others have working examples) ** = Item available via U-Engineer.com

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