Mechanics of Drawing In step 4, As the metal in the flange moves toward the center, it is subjected to the following state of stress:
{"Image DocumentName": "Mechanics of DrawingIn step 4, As the metal in the flange moves toward the center, it is subjected to the following state of stress:", "Image ImageDescription": "1- Compression in the circumferential direction (the outer perimeter becomes smaller) 2- Tension in the radial direction. 3- A relatively small compression in the thickness direction. Since the volume of metal remains constant, and because the circumferential stress is relatively large, the sheet will thicken as it moves in the flange area. (this is why the clearance between the punch and die is higher than the sheet thickness by about 10%) In order for the material to be drawn: 1- Friction between the sheet material and surfaces of the blank holder and die must be overcome. 2- Deformation energy should be provided.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}