Fracture of thin-walled bodies with crack under biaxial loading

✍ Scribed by V.N. Bastun

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 540 KB
• Volume: 48
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(94)90177-5

✦ Synopsis

The influence of the load applied parallel to the crack on the fracture stress oriented perpendicular to the crack in thin-walled circular cylindrical shells with a longitudinal through slot has been investigated.

The shells, made from titanium alloys of two brands and low-carbon steel, were subjected to static and cyclic loading by axial force and internal pressure at their various ratios. It is shown that the longitudinal tensile load in definite limits causes an increase of fracture stress and durability along with a decrease of the crack growth rate. The opposite result is obtained when the applied load is compressive.

Experimental values of fracture stresses are compared with those calculated under the assumption that the crack surface energy density or the critical value of the J-integral is independent of the stress state mode.