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Research on the Numerical Methods of the Determination of Multiple Stress Intensity Factors

Author: WangHaiJun
Tutor: LiuYiHua
School: Hefei University of Technology
Course: Solid Mechanics
Keywords: The number of stress singularity Stress intensity factor Numerical Methods
CLC: O346.1
Type: Master's thesis
Year: 2002
Downloads: 103
Quote: 2
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Abstract


Based on the basic equations of elastic plane problems derived homogeneous material V- notch tip , the crack tip and the combination of materials interface edge stress singularity characteristic equation and its nearby displacement field and the singular stress field . Based on the results of conventional numerical analysis , a stress component to determine the stress singularity times and double the number of stress singularity numerical methods , numerical methods determine the stress intensity factor and double stress intensity factor . Numerical analysis of the results of the numerical method and the finite element program Algor Ⅰ crack , I and Ⅱ mixed mode crack V -notch and the combination of materials interface edge stress singularity double stress singularity problem specific calculation . The calculation results show that the best direction to determine the number of stress singularity and stress intensity factor in ( σ to 1 - σ 3 < / sub >) changes in gradient minimal direction , the proposed the numerical method has a simple , general-purpose and high accuracy , ease of practical engineering applications .

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CLC: > Mathematical sciences and chemical > Mechanics > Solid Mechanics > Strength theory > Fracture theory
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