ON THE USE OF DISPLACEMENT EXTRAPOLATION TO OBTAIN CRACK-TIP SINGULARSTRESSES AND STRESS INTENSITY FACTORS

Authors
Citation
Wx. Zhu et Dj. Smith, ON THE USE OF DISPLACEMENT EXTRAPOLATION TO OBTAIN CRACK-TIP SINGULARSTRESSES AND STRESS INTENSITY FACTORS, Engineering fracture mechanics, 51(3), 1995, pp. 391-400
Citations number
16
Categorie Soggetti
Mechanics
ISSN journal
00137944
Volume
51
Issue
3
Year of publication
1995
Pages
391 - 400
Database
ISI
SICI code
0013-7944(1995)51:3<391:OTUODE>2.0.ZU;2-9
Abstract
A displacement extrapolation method is developed which can be used to obtain crack tip singular stresses and stress intensity factors using only nodal displacements in the first layer of elements around the cra ck tip. A major benefit with this technique is that no analytical solu tions are required. The triangular quarter-point elements are used aro und the crack tip to obtain nodal displacements with sufficient accura cy. Three geometries are considered: a single edge crack, a central cr ack and double edge crack. Two loading types are used: uniaxial tensio n and uniform pressure on the crack surface. Excellent results for sin gular stresses and displacements are obtained for Mode I crack problem s.