Test Methods For Formability Of Sheet Metal

Tips for sheet metal testing.

Test methods for formability of sheet metal.

This inexpensive and simple way of evaluating formability however is not very reliable because while. Anisotropy in sheet metals. Sheet metal forming simulation is almost meaningless without accurate material data. 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.

It is assumed or considered that the larger is the value of total elongation the more formable is the material. 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 old saying garbage in garbage out rings true in this regard. 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. Anisotropy in sheet metal can be useful in deep drawing and other forming processes. 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 e517 standard test method for plastic strain ratio r for sheet metal decides its determination.