Patent ID: 7870792
Filing Date: 2011-01-18
Classification: G06F

Abstract:
1. A method for forming limit strain analysis, wherein for at least one material point of a sheet metal which is formed by a forming process, proceeding from an initial state, a strain state in a target state of the material point is computed, and may be brought into relation with a forming limit strain curve, in a forming limit strain diagram, wherein the following steps are carried out: simulating of the forming process and computing of strains ε resulting therewith, and further state variables of the material, in at least one material point of the sheet metal; computing of further state variables of the material in the target state of the at least one material point; computing of a proportional loading, which leads to a state corresponding to the further state variables of the material in this target state; determining an equivalent strain corresponding to this proportional loading; and using this equivalent strain as a strain state in the target state of the material point.