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How To Use STEP Geometry for Engineering Analysis












This guide is aimed at system managers who are implementing and supporting data exchange by purchasing STEP interfaces and users who want to communicate with customers and/or suppliers about using STEP for data exchange.

The guide covers:

  • What STEP interfaces are available
  • What the parts and conformance classes cover
  • How to choose which part and conformance class to use.

During the course of engineering analysis there are many information flows which would benefit from the availability of neutral file exchange. The group who have developed this guide are primarily involved in the CAD to FE interface. However, the parts of STEP which cover FE data are not yet at International Standard level prototype implementations have been developed. Therefore this guide is restricted to the exchange of engineering data between a CAD system and a FE pre-processor.

Contents

INTRODUCTION

HOW TO USE STEP

    • Commonly Available Interfaces

OVERVIEW OF STEP

    • Background
    • Structure
      • Resource Layer
      • Application Layer
      • Implementation Layer
    • Standardisation Process

GEOMETRIC MODEL TYPES

    • Wire-frame Model
    • Surface Models
      • Geometrically Bounded Surface Model
      • Surface Models with Topology
    • Solid Models
      • Boundary Representation (B-rep)
        • Faceted B-rep Models
      • Constructive Solid Geometry (CSG) Models

AIC PARTS

    • Introduction
    • Geometrically Bounded Surface – part 507
    • Non Manifold Surface – part 508
    • Manifold Surface – part 509
    • Geometrically bounded wireframe – part 510
    • Topologically bounded surface – part 511
    • Faceted B-rep – part 512
    • Elementary B-rep – part 513
    • Advanced B-rep part 514
    • Constructive solid geometry part 515

STEP APPLICATION

    • AP 203 Configuration Controlled Design
    • AP214, Core Data for Automotive Mechanical Design Process

GEOMETRY EXCHANGE PROBLEMS

    • Different Representations
    • Geometric Precision Problems

FUTURE DEVELOPMENTS

    • SDAI
    • AP209
    • Modular Application Protocols
    • Benefits of Modularisation

 

RESOURCE PARTS OF STEP

  • A.1 Part 41
  • A.2 Part 42
  • A.3 Part 43
  • A.4 Part 45

GLOSSARY

FURTHER INFORMATION

Books, Reports and Newsletters

WEB Sites



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About

R. Goult & D. Greenfield

First Published - January 1999

Softback - 48 Pages