Test Methods For Formability Of Sheet Metal

Tips for sheet metal testing.

Test methods for formability of sheet metal.

The r value of sheet varies with the applied axial strain and as such should be reported at the tested strain level unlike many other materials with r values that stay constant over the range of plastic strains. The fem and experimental methods were used in order to demonstrate how two dimensional in plane simulation can help interpret and develop such tests as well as to understand the nature of material behavior and governing mechanics. Astm e646 is a tensile test that measures the stress strain response in the plastic region prior to necking dp 0. This inexpensive and simple way of evaluating formability however is not very reliable because while.

Anisotropy in sheet metals. Anisotropy in sheet metal can be useful in deep drawing and other forming processes. To correctly and accurately capture the mechanical properties of material for use in simulation a tensile test is performed. Astm e646 stan dard test method for tensile strain hardening exponents of metallic sheet materials governs the determination of the strain hardening exponent.

Sheet metal forming simulation is almost meaningless without accurate material data. The old saying garbage in garbage out rings true in this regard. In this chapter 1 sheet metal formability tests such as the tensile test the plane strain test and the in plane stretching test are analyzed. In sheet metal industry the initial estimation of formability is usually based on total elongation measured from the tensile test.