Project Overview
In this example, we simulate the square deep drawing process using the Abaqus software. The model consists of a punch, holder, sheet, and die.
Due to the symmetry of the model, only one-fourth of the complete model is simulated in Abaqus. The one-fourth model and the complete model can be observed in the model configuration.
One-fourth and complete model of the square deep drawing process.
Deep Drawing Process
At the beginning of the deep drawing process, the sheet is placed on the die. The holder is then positioned on the sheet and a predetermined force is applied to the holder to keep the sheet in place during the forming process.
Sheet and holder positioned on the die.
Blank Holder Force
The blank holder force must be selected appropriately. If the applied force is too high, the required punch force increases and the sheet may eventually be sheared. On the other hand, if the blank holder force is too low, the sheet may develop wrinkles.
Therefore, selecting an appropriate blank holder force is an important part of the square deep drawing process.
Punch Movement
In the next stage, the punch is positioned on the sheet and moves downward. The downward movement of the punch forces the sheet into the die and gradually forms the desired square shape.
Downward movement of the punch during the deep drawing process.
Final Shape of the Sheet
At the end of the deep drawing process, the sheet obtains the desired square-shaped configuration.
Final shape of the sheet after the deep drawing process.
Sheet Thickness
The thickness distribution of the formed sheet is investigated after the deep drawing process. The minimum sheet thickness is 0.68 mm, which is displayed by the blue region in the Abaqus results.
Thickness distribution of the sheet after deep drawing.
Equivalent Plastic Strain
The equivalent plastic strain (PEEQ) is also investigated to evaluate the plastic deformation of the sheet. The regions with the highest PEEQ values are displayed in red.
Equivalent plastic strain (PEEQ) distribution in the sheet.
Punch Force–Displacement Diagram
The simulation also provides the diagram of the force applied to the punch versus punch displacement. This force is transmitted through the punch to the sheet and is responsible for deforming the sheet during the deep drawing process.
The punch force is an important result because it represents the force required to achieve the complete deformation of the sheet.
Punch force versus punch displacement diagram.
What You Will Learn
- How to simulate a square deep drawing process in Abaqus.
- How to model a punch, holder, sheet, and die.
- How to take advantage of model symmetry and simulate one-fourth of the model.
- How to define and apply the blank holder force.
- How the blank holder force affects the deep drawing process.
- How excessive blank holder force can cause shearing of the sheet.
- How insufficient blank holder force can lead to wrinkling.
- How to define the downward movement of the punch.
- How to investigate the final shape of the formed sheet.
- How to evaluate the thickness distribution of the sheet.
- How to determine the minimum sheet thickness.
- How to investigate equivalent plastic strain (PEEQ).
- How to obtain the punch force–displacement diagram.
- How to investigate the force required for the complete deformation of the sheet.
Key Features
- Square deep drawing simulation in Abaqus.
- One-fourth model used due to symmetry.
- Punch, holder, sheet, and die included.
- Blank holder force applied to hold the sheet in place.
- Downward punch movement.
- Final square-shaped sheet configuration.
- Minimum sheet thickness of 0.68 mm.
- Equivalent plastic strain (PEEQ) results.
- Punch force versus punch displacement diagram.
- Aluminum material data included in the Excel file.
Project Information
Important information about this project
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