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Numerical simulation of a structure having a heat-affected zone using a finite element analysis model

A technology of numerical simulation and heat-affected zone, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as tedious input, difficult to change model configuration, etc.

Inactive Publication Date: 2013-12-18
LIVERMORE SOFTWARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with the prior art described above is that it requires tedious input requiring the user to define a large number of material properties to account for different distances from the heat source, making model configurations such as the size of elements near the heat source difficult to change

Method used

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  • Numerical simulation of a structure having a heat-affected zone using a finite element analysis model
  • Numerical simulation of a structure having a heat-affected zone using a finite element analysis model
  • Numerical simulation of a structure having a heat-affected zone using a finite element analysis model

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Embodiment Construction

[0024] First refer to image 3 , shows a flow chart of an exemplary method 300 for numerically simulating a structure having a heat-affected zone (HAZ), such as an automobile, an aircraft, or parts thereof, using a finite element analysis (FEA) model, according to an embodiment of the present invention. The method is preferably implemented in software.

[0025] The method 300 begins at step 302, where a computer system (such as Figure 8 A finite element analysis (FEA) model is defined and received in a computer 800 as shown. The FEA model represents the structure and includes at least a set of finite elements configured to represent a portion of the welded structure enclosing at least one heat-affected zone (HAZ).

[0026] Figure 4A -D shows various exemplary finite elements that can be used to represent welded structural parts within the FEA model. Figure 4A with 4B Two-dimensional quadrangular thin film elements 402 and three-dimensional solid elements 404 are shown ...

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Abstract

Methods and systems for conducting numerical simulation of a structure having heat affected zones (HAZ) using a finite element anaysis (FEA) model are disclosed. A FEA model that includes at least a group of finite elements representing a welded structural part that encompasses at least one HAZ is defined and received in a computer system. Each finite element in the group is configured with at least one integration point according to FEA. The group of finite elements is associated with a set of HAZ material properties representing structural behavior of the welded structural part inside and outside the HAZ. Corresponding material properties are then determined and assigned to each integration point by interpolating the associated set using the shortest heat-propagation distance between each integration point and the heat source locations (e.g., spotwelds' centroid) with an automated procedure that requires no additional input after the HAZ material properties have been defined.

Description

technical field [0001] The present invention relates generally to computer-aided engineering analysis, and more particularly to methods and systems for performing numerical simulations of structures having heat-affected zones located near heat sources, such as welds. Background technique [0002] Computer Aided Engineering Analysis (CAE) has been used to support engineers in many tasks. For example, in structural or engineering product design programs, CAE analysis, especially finite element analysis (FEA), is often used to predict structural behavior (such as stress, displacement, etc.) under different simulated load conditions (such as static or dynamic) ). [0003] Finite element analysis (FEA) is a computerized method widely used in industry to analyze problems related to complex products or systems (such as automobiles, aircraft, consumer products, etc.) such as three-dimensional nonlinear structural design and analysis. Numerical simulation of engineering problems (e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 约翰·奥·哈尔奎斯特
Owner LIVERMORE SOFTWARE TECH