Issue 49

S.A.G. Pereira et alii, Frattura ed Integrità Strutturale, 49(2019) 412-428; DOI: 10.3221/IGF-ESIS.49.40

Edições. [17] Ayatollahi, M.R., Pavier, M.J., Smith, D.J. (1998). Determination of T-stress from finite element analysis for mode I and mixed mode I / II loading, Int. J. Fract., 91, pp. 283–298. [18] Sih, G.C. (1991). Mechanics of fracture initiation and propagation, Springer.

S YMBOLOGY

a – crack length B – specimen thickness β – crack angle E – Young’s modulus φ 0

κ - parameter for plane stress or strain M e – mixity parameter P – applied load Q – shear force on the crack tip S – distance between rollers S 0 – distance from the line of load application to the plane of the crack σ – tensile stress; remote stress T – T -stress W – specimen width

– crack propagation angle

K – stress intensity factor K eq – equivalent stress intensity factor K I – stress intensity factor for mode I K Ic – critical stress intensity factor for mode I K II – stress intensity factor for mode II K IIc – critical stress intensity factor for mode II K III – stress intensity factor for mode III

428