3D fracture behaviour of graphite specimens weakened by V- notches with end holes under mixed mode (I+II) loading. (October 2019)

• Record Type: Journal Article
• Authors: Salavati, H.; Mohammadi, H.; Alizadeh, Y.; Ayatollahi, M.R.
• Is Part Of: Engineering failure analysis. Volume 104(2019)
• Page Start: 682
• Page End: 689
• Publication Date: 2019-10
• Subjects: Brittle failure -- Thickness -- V- notch with end hole -- Mixed mode -- Graphite; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2019.06.050
• Languages: English
• ISSNs: 1350-6307

Abstract

Abstract: In the present contribution, the static strength of isostatic graphite using V-notched specimens with end holes under mixed mode loading is investigated considering 3D simulation. An experimental program was performed and in total, 14 new experimental data are provided in the paper for the first time. The criterion based on the averaged value of the strain energy density over a control volume which has been applied to assess the static strength of the different 2D specimens, is developed in the current work by modification of the control volume to assess the thickness effect on the static strength of graphite specimens. A sound agreement is found between the experimental data and the results obtained from the strain energy density criterion. Highlights: The first mixed mode tests on key-hole notches made of 3D isostatic graphite specimens are summarized. The value of Strain Energy Density (SED) is developed to investigate the 3D static strength of the specimens. The effect of thickness on the critical fracture load and the value of SED is investigated.