New specimen for fracture toughness determination for rock and other materials

Chong, Ken P.; Kuruppu, Mahinda

doi:10.1007/bf01157555

Cited by 316 publications

(82 citation statements)

References 4 publications

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“…1). It should be mentioned that for larger crack angles > 60 o , a small wedge of a material beneath the crack forms and can be simply fractured (Chong & Kuruppu, 1984;Whittaker, Singh, & Sun, 1992). Subsequently, the current numerical results were limited to  ≤ 60 o .…”

Section: Present Analysismentioning

confidence: 99%

“…Among the wellknown test specimens is the "Semi-Circular Bend" (SCB) specimen under three-point bending (Lim et al, 1994). The SCB specimen has a simple geometry, loading arrangement, the capability of applying various mode mixity by changing the pre-crack inclination angle relative to the applied load Chong & Kuruppu, 1984;Kuruppu & Chong, 2012;Rashidi Moghaddam et al, 2017). It provides a simple and effective technique for conducting mixed mode fracture tests in brittle materials (Aliha et al, 2010Elghazel et al, 2016;Ameri et al, 2012Ameri et al, , 2016Fathipour Azar et al, 2015;Kataoka et al, 2017;Wei et al, 2016Aliha & Ayatollahi, 2013Aliha & Saghafi, 2013;Aliha & Fattahi Amirdehi, 2017;Fakhri et al, 2018;Roy et al, 2017a,b;Abd-Elhady 2013;Mirsayar et al, 2017;Funatsu et al, 2014;Artamendi & Khalid, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Fayed¹

2018

10.5267/j.esm

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An in-house finite element code was utilized to evaluate mode I/II stress intensity factor (SIF) of an edge cracked semi-circular disc subjected to three-point bending. The specimen was considered as an isotropic and homogeneous material. Relative span length ratios of 0.3 to 0.8 in steps of 0.1 were invoked. Relative crack length ratios of 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 were analyzed with crack angles up to 60° in steps of 5°. At the same crack length, mode I SIF decreases with increasing crack angle or decreasing the span length. The range of pure mode II decreases with increasing the span length. For the same crack length, the crack angle corresponding to the transition from a mixed mode I/II to a pure mode II increases with increasing the relative span length ratio. On the contrary, that angle decreases with increasing the crack length for the same span length. Good agreement has been generally obtained with relevant results found in the literature.

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Section: Present Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Fayed¹

2018

10.5267/j.esm

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“…Since the material is weak in tension, tests should preferably be done with compressive loading where tensile fracture is induced. To satisfy this requirement, Chong and Kuruppu [23] proposed a bending test by using a semi-circular specimen with a pre-notch along the line of symmetry at the specimen's edge and oriented along the loading direction, subjected to a three-point bending load, as shown in Fig. 3.…”

Section: Semi-circular Bending (Scb) Testmentioning

confidence: 99%

Macro-Micro Mechanical Behavior of a Highly-Particle-Filled Composite Using Digital Image Correlation Method

Chen¹,

Zhou²,

Huang³

2011

Advances in Composite Materials - Analysis of Natural and Man-Made Materials

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“…Furthermore, the SCB geometry is even more preferred when one considers fracture testing of field cores which are mostly in circular shape. The SCB test was originally proposed by Chong and Kuruppu [26,27] and has been used by many researchers [28][29][30][31] to identify the fracture characteristics of various types of engineering materials. The SCB test has shown sensitive test results depending on the testing conditions (temperatures and moisture), materials used in the mixtures, and loading conditions (e.g., rates).…”

Section: Laboratory Tests and Evaluationmentioning

confidence: 99%

Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

Kim

Zhang

Ban

2012

Construction and Building Materials

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This study presents laboratory evaluation integrated with field performance to examine two widely used warm-mix asphalt (WMA) approaches-foaming and emulsion technology. For a more realistic evaluation of the WMA approaches, trial pavement sections of the WMA mixtures and their counterpart hot-mix asphalt (HMA) mixtures were implemented in Antelope County, Nebraska. Fieldmixed loose mixtures collected at the time of paving were transported to the laboratories to conduct various experimental evaluations of the individual mixtures. Among the laboratory tests, three (two conventional and one newly attempted) were performed to characterize moisture damage potential which is the primary focus of this study. From the laboratory test results, WMA mixtures showed greater susceptibility to moisture conditioning than the HMA mixtures, and this trend was identical from multiple moisture damage parameters including the strength ratio and the critical fracture energy ratio. Early-stage field performance data collected for three years after placement presented satisfactory rutting-cracking performance from both the WMA and HMA sections, which generally agrees with laboratory evaluations. Although the field performance data indicated that both the WMA and HMA show similar good performance, careful observation of field performance over aperiod of years is necessary since moisture damage can be accelerated after rutting or cracking as a later-stage pavement distress.

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New specimen for fracture toughness determination for rock and other materials

Cited by 316 publications

References 4 publications

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Macro-Micro Mechanical Behavior of a Highly-Particle-Filled Composite Using Digital Image Correlation Method

Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

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