On T-Stresses Near V-Notches

The second term of stress field around a sharp V-notch under mode I loading was investigated. It was found that in the Cartesian coordinate system, unlike the T-stress in cracked bodies, the second term of Williams' expansion in all three stress components is nonzero and its value depends on the distance from the notch tip. Thus, according to the stress based fracture criteria, in addition to the singular term, the first non-singular term may also play an important role in brittle fracture of sharp V-notched components under mode I loading.