Search International and National Patent Collections

1. (WO2017157363) METHOD FOR TRANSFERRING A STRESS STATE (STRESS TENSOR) OF AN FE SIMULATION RESULT TO A NEW FE MESH GEOMETRY OF A MODELED CONSTRUCTION SYSTEM IN A SIMULATION CHAIN OF PRODUCTION OPERATIONS

Pub. No.:    WO/2017/157363    International Application No.:    PCT/DE2017/000054
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: G06F 17/50
Applicants: INPRO INNOVATIONSGESELLSCHAFT FÜR FORTGESCHRITTENE PRODUKTIONSSYSTEME IN DER FAHRZEUGINDUSTRIE MBH
Inventors: NITSCHE, Martin
WESSELS, Heribert
Title: METHOD FOR TRANSFERRING A STRESS STATE (STRESS TENSOR) OF AN FE SIMULATION RESULT TO A NEW FE MESH GEOMETRY OF A MODELED CONSTRUCTION SYSTEM IN A SIMULATION CHAIN OF PRODUCTION OPERATIONS
Abstract:
The invention relates to a method for transferring a stress state of an FE simulation result to a new FE mesh geometry of a simulated construction system, such as a component for motor vehicles that has a 3-D shape, in a simulation chain of production operations, comprising: a) providing a first data set (D1), which describes the FE simulation result with a stress state of the FE simulation (FE-N1) of the construction system or component (1) of a first production operation, b) creating the new FE mesh geometry (FE-N2) of the simulated construction system or component (1), which new FE mesh geometry is associated with a second production operation, c) transferring the stress state of the provided first data set (D1) to the new FE mesh geometry (FE-N2) of the construction system or component (1), d) performing an equilibrium calculation (R) by using the stress tensor (S1) in the FE mesh geometry FE-N2, wherein deformation of the construction system or component (1) results, which deformation differs from the deformation in the FE mesh FE-N1 by a shape alteration u > tolerance value ε, e) iteratively repeating the equilibrium calculation (R) as a cyclic equilibrium iteration in the new FE mesh geometry (FE-N2) (in the new target FE mesh) of the construction system or component (1), wherein, in each cycle, a new stress state is applied to the FE mesh geometry (FE-N2) of the construction system or component (1) and stress components that lead to undesired shape alterations are decreased until a displacement/termination criterion of shape alteration u < tolerance value ε is achieved, and f) displaying the fulfilled condition of u < ε.