Crack initiation from blunt notches under biaxial loading

✍ Scribed by G.A. Papadopoulos; P.I. Poniridis

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 983 KB
• Volume: 31
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(88)90122-1

✦ Synopsis

In this paper the crack initiation from blunt notches under biaxial loading is studied. The crack extension angle and the critical fracture stress are determined for notches with finite notch tip radii and for various angles of loading and for various biaxiality factors. The Det.-criterion, developed by the first author, is used. According to Det.-criterion, the crack propagates in the direction of the maximum value of the determinant of the stress tensor. The Det.-criterion is simpler and more flexible and applicable than the other fracture criteria up to now. e c =---cos-KI p 38 KU e 38 x (2,rrr)"2 2 [ l-sin-sin--p--cos----2 2 I (2~r)"* 2r 2 (27rr)l'2 sin-2 [ 2+cos-cos--I 2 2 KII + (2~r)'/* 2r ----Psin~+~~(1-k)cos2~, KI a,=jqiE cos! 2 [ l+sinBsing 2 2 I + K1 ' cos2+ 2 KII 0 sin -2 0 38 01/2Tr (27rr)"2 cos -2 cos --2 KII p 38 ---sin-(277r)