Brittle Fracture Analysis Using a Ring-Shape Specimen Containing Two Angled Cracks

Abstract

A ring shaped specimen is used for studying mixed mode fracture in brittle materials. The ring specimen is subjected to a compressive diametral load and contains two angled central cracks. A series of fracture tests are conducted under various mode mixities using the ring specimen. It is shown that the obtained experimental results are in a very good agreement with theoretical predictions of the modified maximum tangential stress criterion.

Determination of mode III fracture toughness for different materials using a new designed test configuration

“…can be used for determining pure mode I fracture toughness (K Ic ) of different engineering materials such as metals, polymers, rocks, ceramics and concretes. In addition, to obtain pure mode II fracture toughness a number of specimens have been used frequently in the past which, the inclined center cracked circular or ring specimen subjected to dimateral compression [1,[16][17][18][19], inclined edge cracked semi-circular bend specimen [2,20], vertical edge cracked semi-circular bend specimen subjected to asymmetric three-point bend loading [21,22], the punch through shear specimen [23] and the edge cracked beam subjected to anti-symmetric four-point bending [24] are to name a few. Therefore, in comparison with the intensive K Ic and K IIc values reported in the literature for various kinds of materials, only limited data is available for their K IIIc values.…”

Size-dependent fracture behavior of Guiting limestone under mixed mode loading

“…(4). The fracture parameters T, A 3 and B 3 depend on the geometry and loading conditions of the test specimen and their magnitudes may vary over a wide range for different test samples [23][24][25][26][27]. The parameters T, A 3 and B 3 can be represented in dimensionless forms as:…”

Evaluation of interfacial bond strength between Portland cement concrete and asphalt concrete layers using bi-material SCB test specimen

“…Erdogan & Sih (1963), Williams & Ewing (1972) and Theocaris (1984) used a rectangular plate containing an inclined center crack subjected to a uniform far field tension in their mixed mode fracture studies. The symmetric and asymmetrically loaded three or fourpoint bend specimens were also employed by researchers for investigating mode I and mixed mode brittle fracture (Fett et al, 1995;Xeidakis et al, 1996;Suresh et al, 1990, Aliha et al 2009Razavi et al, 2017Bahmani et al 2017;Heidari-Rarani et al, 2014), Disc type specimens including the centrally cracked Brazilian disk (BD) specimen, centrally cracked/notched ring specimen subjected to diametrall compression, edge notch disc bend (ENDB) and the semi-circular bend (SCB) specimen have been frequently employed for determining the mixed mode fracture resistance of various engineering materials such as rocks, graphite, concretes and polymers (Awaji & Sato, 1978;Ayatollahi et al, 2006;Ameri et al 2012Ameri et al ,2016Razmi & Mirsayar, 2017;Alhasan 2013;Fakhri et al 2017, Aliha et al 2008,2015a,c, 2017, Abd-Elhady 2013Al-Hdabi et al 2014;Dehghany et al 2017. However, some of these specimens have certain shortcomings.…”