Arcan-Richard Specimens: Is there a Pure Shear Mode?
|Periodical||Key Engineering Materials (Volumes 452 - 453)|
|Main Theme||Advances in Fracture and Damage Mechanics IX|
|Edited by||A. Saimoto and M.H. Aliabadi|
|Citation||Stanislav Seitl et al., 2010, Key Engineering Materials, 452-453, 345|
|Online since||November, 2010|
|Authors||Stanislav Seitl, Pavel Hutař, Alfonso Fernández-Canteli|
|Keywords||Arcan-Richard Specimen, Mixed-Mode, Stress Intensity Factor (SIF), T-Stress, Williams Expansion|
Traditionally, applications of fracture mechanics have been mainly focused on cracks growing under the opening or mode I mechanism (three point bend specimen, middle tension specimen, crack tension specimen, etc.). When investigating instability under mixed mode loading conditions, three different alternatives can be envisaged consisting of: a) machining a hole in standard specimens, b) creating a crack oriented under a given angle, and c) using non-standard Arcan-Richard specimens. In this work, finite element calculations are performed to analyze the initial values of the fracture parameters in Arcan-Richard specimens. First, the influence of the normal stress mode to the shear stress mode ratio is analyzed, then the effect of the constraint level is discussed, and finally, the initial propagation angle of the daughter crack is derived.