A continuous–discontinuous hybrid boundary node method for solving stress intensity factor. (August 2017)

• Record Type: Journal Article
• Authors: Yan, Fei; Feng, Xia-Ting; Lv, Jia-He; Li, Shao-Jun
• Is Part Of: Engineering analysis with boundary elements. Volume 81(2017)
• Page Start: 35
• Page End: 43
• Publication Date: 2017-08
• Subjects: Meshless method -- Dual reciprocity method -- Hybrid boundary node method -- Discontinuous shape function -- Radial point interpolation method; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2017.05.002
• Languages: English
• ISSNs: 0955-7997

Abstract

Abstract: A novel boundary type meshless method called continuous–discontinuous hybrid boundary node method is proposed in this paper, in which the enriched discontinuous shape function is developed to solve linear elastic crack problems. Firstly, the whole boundary is divided into several individual segments, and variables on each one of those segments are interpolated, respectively. For continuous segments, radial point interpolation method is employed. In regard to discontinuous segments, the enriched discontinuous basis functions combining with radial point interpolation method are developed for simulating the discontinuity of displacement and stress field on surfaces of crack, and the near tip asymptotic field functions are employed for simulating the high gradient of stress field around crack tip, so that high accuracy and discontinuity property of a crack can be easily described. Stress intensity factors are calculated directly using displacement extrapolation by displacement field near crack tip. Some numerical examples are shown that the present method is effective and can be widely applied in some practical engineering.