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On the use of quarter-point boundary elements for stress intensity factor computations

✍ Scribed by José Martínez; José Domínguez

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
403 KB
Volume
20
Category
Article
ISSN
0029-5981

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✦ Synopsis

This communication studies a procedure for stress intensity factor computations using traction singular quarter-point boundary elements. Opening mode stress intensity factors are computed from the tractions' nodal values at the crack tip. A comparison is made between the factors calculated using this procedure and those obtained by previously recommended methods which made use of the nodal values of the displacements. The proposed procedure was seen to be less discretization sensitive than any other of the considered methods. Accurate results were obtained even in the case of coarse meshes.

where r and 0 are defined in Figure 1, K , and K , , are the stress intensity factors corresponding to the opening and the sliding mode, respectively, and the size of r is much smaller than the crack length. The displacements near the crack tip are t Research Assistant.

📜 SIMILAR VOLUMES

On stress intensity factor computation f
On stress intensity factor computation from the quarter-point element displacements
✍ Lim, I. L. ;Johnston, I. W. ;Choi, S. K. 📂 Article 📅 1992 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 403 KB 👁 1 views

In conjunction with the quarter-point element, a wide range of stress intensity factor computation techniques may be employed. Of these, the displacement correlation technique (DCT) and the quarterpoint displacement technique (QPDT) have been in common use. It has been suggested by various investiga

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## Abstract This paper presents a boundary element method (BEM) procedure for a linear elastic fracture mechanics analysis in two‐dimensional anisotropic bimaterials. In this formulation, a displacement integral equation is only collocated on the uncracked boundary, and a traction integral equation