A Goal Oriented Numerical Simulation Approach for Computing Stress Intensity Factors in Bimaterials

Z.C. Xuan; J.W. Peng

doi:10.4028/www.scientific.net/MSF.575-578.249

Paper Titles

A Research on Steel Synchronizer Gear Ring's Precision Forging
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Researches on Rules of the Longitudinal Residual Stress Distribution in Straightening Deformation Zone of Heavy Rail with Multi-Rollers
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The Application on Initial Design of Auto Panel Based on One-Step FEM
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Research on Behavior of Slab Surface Defects in Forward Slip Zone during V-H Rolling Process
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A Goal Oriented Numerical Simulation Approach for Computing Stress Intensity Factors in Bimaterials
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Finite Element Analysis of Stress and Strain in Two-Wedge Cross Wedge Rolling Step-Shaft Part
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Analysis of Hammering Deformation Processes by the Dynamic Explicit Finite Element Method
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Study on Flow Stress Model of a Microalloyed High Strength Steel in CSP Hot Rolling
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Thermal-Mechanical Analysis of Metal Forming Based on Meshfree Method
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HomeMaterials Science ForumMaterials Science Forum Vols. 575-578A Goal Oriented Numerical Simulation Approach for...

A Goal Oriented Numerical Simulation Approach for Computing Stress Intensity Factors in Bimaterials

Abstract:

We present a method for computing the stress intensity factors in bimaterials based on the goal oriented finite element error estimate. The goal oriented analysis focuses on computing the bounds on the local quantities of interest, e.g. local stresses, local displacements, stress intensity factors etc, of a structure, and with the bounds obtained on the coarse finite element mesh we can obtain the quantities of interest with nearly the same accuracy as that obtained on the fine finite element mesh. In this paper the stress intensity factors in bimaterials are first formulated as explicit computable linear function of the displacements by means of the two-points extrapolation method. Then the goal oriented finite element method is used to compute the lower and upper bounds on the stress intensity factors, and the average of the bounds is considered as a prediction of the stress intensity factor. At last, the stress intensity factors, 0 K and r K , in bimaterials are computed with the proposed method to show its efficiency.