Computer pre-tensioning simulation

Computer pre-tensioning simulation

Computer pre-tensioning simulation

Keywords: Simulation, Patents

Applicant: Hibbitt, Karlsson and Sorenson, Inc., USAPatent number: US5,920,491Publication date: 6 July 1999Title: Computer Process for Prescribing an Assembly Load to Provide Pre-tensioning Simulation in the Design Analysis of Load-Bearing Structures

This relates to the analysis and design of structural integrity of structures via computer implemented simulation. The invention simulates the tightening of fasteners that are used to assemble a structure using a pre-tensioning capability.

In accordance with one embodiment of the invention, a computer implemented process simulates the application of a tension force in an element of an assembly. The process defines a finite element model for the element, and creates a pre-tension surface in the finite element model of the element for applying the tension force. Conditions are prescribed relative to the pre-tension surface for applying the tension force in the simulation. The conditions include prescribing an assembly load which includes either a tension force or a tightening adjustment. The assembly load is then applied to the pre-tension surface of the element to simulate the tension in the element of the assembly. The results of the simulation are then evaluated for structural integrity, and subsequent structural redesign is performed when necessary.