Basic Formability for Aerospace - 3 day course


The objective of this course is to understand the inputs into a stamping operation and how to interpret the results. The effects of part geometry, material properties, part defects, formability guidelines are thoroughly discussed. It teaches the fundamentals of analyzing a part by understanding its markings.

1.0 Understanding Material Properties
1.1 How a Stamping Holds its Shape
1.2 n -Value and Stretchability
1.3 r -Value and Drawability
1.4 Typical n, r and Yield Strength for Different Materials
1.5 Advanced Stamping Materials
1.6 Aluminum Alloys
1.5 Aluminum vs Steel Examples

2.0 Circle Grid and Thinning Strain Analysis
2.1 What is Circle Grid and Thinning Strain Analysis
2.2 Use of Circle Grid and Thinning Strain Analysis 
2.3 How to Apply Circle Grids
2.4 Determining and Plotting Major and Minor Strains
2.5 Concept of a Forming Limit Diagram
2.6 Determining the Position of the Forming Limit Curve for Different Materials
2.7 Interpretation of Results
2.8 How to Perform Thinning Strain Analysis
2.9 Benefits of Thinning Strain Analysis (TSA)

3.0 Hydroforming and Stretch Forming
3.1 Basic Principles of Tube Hydroforming
3.2 Sheet Hydroforming
3.3 Stretch Forming
3.4 Rubber Pad Forming

4.0 Manufacturing Considerations for Designers
4.1 Terminology of a Stamping Die
4.2 Aluminum Manufacturing Issues

5.0 Types of Defects
5.1 Introduction
5.2 Splits or Smiles
5.3 Wrinkling Defects
5.4 Defects Due to High and Lows
5.5 Stiffness and Dent Resistance

6.0 Modes of Forming and Guidelines
6.1 Cutting
6.2 Bending, Flanging and Hole Expansion
6.3 Stretching and Embossing
6.4 Drawing and Cup Drawing
6.5 Formability Guidelines for Regional Features

7.0 Measuring the Formability of Stampings

7.1 Understanding the Evaluation of Complex Panels
7.2 Formability Guidelines for Local Features
7.3 Formability Guidelines for Regional Features
7.4 Global Analysis of a Panel