Forming Limit Curve Generation
You can measure the major strain, minor strain, and thickness
strain in the formed part, but what to you compare those values
against to say if you have a good, robust stamping? The strain
values that mark the forming limit is called the forming
limit curve (FLC).
The shape and placement of the forming limit curve for low
carbon steels have been known for decades thanks to the
pioneering work of Dr. Stuart Keeler. All you need are the
sheet metal thickness and strain hardening exponent (also known
as the n-value).
But what about different types of sheet metal?
Unfortunately, it's not as simple. Both the shape and the
placement of the FLC must be determined through detailed
testing.
Fortunately, Engineering Quality Solutions has both the
experience and equipment to do this testing.
We've developed forming limit curves for sheet zirconium alloys,
nickel alloys, titanium alloys, and numerous stainless steel
grades.
Let us know how we can help solve your challenges!