During any forming operation sheet/blanks are subjected to the load and are required to take some shape.
During such process, thinning and thickening of blank takes place.
Suppose, i am forming a blank of 2 mm thick using any forming operation. what would be the limiting value of thickness, beyond which if the thickness reduces, it can be said that the blank is failed or thinning has started?
How to find out the limiting thinning thickness of a blank during any forming operation?
Does it depend upon strain index ratio or strength coefficient ratio of the blank material?
If any one can answer it will be a great help.
Thank You.
please do the analysis in the computer using any analysis softwares.
It will help you to solve your problem.
Hello Shalin,
The thickness reduction can be measured by marking grids over the blank, such that you can measure the major strain and minor strain as the blank is deformed. Moreover there are many strain based criterias to measure the failure criterias among that one is thickness gradient based necking criteria etc..
Good luck.
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