Partially-enhanced extended finite element method of crack tip unit

The invention relates to the field of fracture mechanics, in particular to a partially-enhanced finite element expansion method of a crack tip unit which comprises the following steps: S1, establishing a crack analysis model; S2, obtaining a matrix equation of partially-enhanced extended finite elem...

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Bibliographic Details
Main Authors NIE DEFU, FAN ZHICHAO, JIANG YONG, CHEN XUEDONG
Format Patent
LanguageChinese
English
Published 06.03.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS
PHYSICS
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Summary:The invention relates to the field of fracture mechanics, in particular to a partially-enhanced finite element expansion method of a crack tip unit which comprises the following steps: S1, establishing a crack analysis model; S2, obtaining a matrix equation of partially-enhanced extended finite element method of the crack tip unit; S3, applying boundary conditions and loads, solving a system equation and acquiring a displacement field of a whole model and S4, on the basis of obtaining the displacement field, obtaining a stress intensity factor at crack tips by adopting a cross-phase integral method. The method has the advantages that the crack tip unit adopts a partially enhanced displacement field, and the enhanced displacement field is adopted for a crack tearing part to simulate the displacement discontinuity of a crack surface; for an untorn part, a finite element continuous displacement field is adopted, and simulation of displacement field characteristics of the crack tip unit can be achieved. 本发明涉及断裂力学
Bibliography:Application Number: CN201910869634