Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On the Statistical Prediction of KIc and GIc for Railway Andesite Ballast Rock Using Different Three-Point Bend Disc Samples
https://orcid.org/0000-0001-9451-0949
Abstract Understanding the cracking resistance of ballast rock materials is key parameter for designing the ballast rock crushing machines or estimating the onset of fracture in the ballast rocks of railway tracks. In this research, mode I fracture toughness (KIc) and mode I fracture energy (GIc) values were determined experimentally for the red andesite ballast rock obtained from the Shahryar mine (Tehran province). Two disc-shaped samples subjected to three-point bending, namely semi-circular bend (SCB) and edge-notched disc bend (ENDB) are selected for conducting the tests and for each specimen 14 replicates were tested. Although a natural scatter was observed for the experimental results the failure probability curves of SCB and ENDB samples showed meaningful difference demonstrating the effect of testing method on mode I fracture behavior. Two- and three-parameter Weibull distribution curves were fitted to the fracture toughness and fracture energy results of andesite ballast rock tested with both specimens. By relating the Weibull distribution curves obtained for the ENDB and SCB samples to their geometries, the statistical fracture behavior curves of SCB were estimated theoretically in terms of the Weibull statistical curves of the ENDB specimen. In addition, the relationship between the statistical fracture toughness and fracture energy data obtained from the tested SCB and ENDB specimens made of andesite ballast rock was examined and it was shown that these two parameters are correlated well to each other as suggested by the framework of linear elastic fracture mechanics.
Highlights Two different mode I configurations were used for rock fracture studies.The effect of specimen geometry on KIc and GIc of andesite ballast rock was studied using Weibull statistical analysis.Two and three-parameter Weibull distribution curves were obtained for the fracture toughness and fracture energy results.The relationship between fracture toughness and strain energy release rate of tested rock samples was investigated statistically.
On the Statistical Prediction of KIc and GIc for Railway Andesite Ballast Rock Using Different Three-Point Bend Disc Samples
https://orcid.org/0000-0001-9451-0949
Abstract Understanding the cracking resistance of ballast rock materials is key parameter for designing the ballast rock crushing machines or estimating the onset of fracture in the ballast rocks of railway tracks. In this research, mode I fracture toughness (KIc) and mode I fracture energy (GIc) values were determined experimentally for the red andesite ballast rock obtained from the Shahryar mine (Tehran province). Two disc-shaped samples subjected to three-point bending, namely semi-circular bend (SCB) and edge-notched disc bend (ENDB) are selected for conducting the tests and for each specimen 14 replicates were tested. Although a natural scatter was observed for the experimental results the failure probability curves of SCB and ENDB samples showed meaningful difference demonstrating the effect of testing method on mode I fracture behavior. Two- and three-parameter Weibull distribution curves were fitted to the fracture toughness and fracture energy results of andesite ballast rock tested with both specimens. By relating the Weibull distribution curves obtained for the ENDB and SCB samples to their geometries, the statistical fracture behavior curves of SCB were estimated theoretically in terms of the Weibull statistical curves of the ENDB specimen. In addition, the relationship between the statistical fracture toughness and fracture energy data obtained from the tested SCB and ENDB specimens made of andesite ballast rock was examined and it was shown that these two parameters are correlated well to each other as suggested by the framework of linear elastic fracture mechanics.
Highlights Two different mode I configurations were used for rock fracture studies.The effect of specimen geometry on KIc and GIc of andesite ballast rock was studied using Weibull statistical analysis.Two and three-parameter Weibull distribution curves were obtained for the fracture toughness and fracture energy results.The relationship between fracture toughness and strain energy release rate of tested rock samples was investigated statistically.
On the Statistical Prediction of KIc and GIc for Railway Andesite Ballast Rock Using Different Three-Point Bend Disc Samples
https://orcid.org/0000-0001-9451-0949
Abstract Understanding the cracking resistance of ballast rock materials is key parameter for designing the ballast rock crushing machines or estimating the onset of fracture in the ballast rocks of railway tracks. In this research, mode I fracture toughness (KIc) and mode I fracture energy (GIc) values were determined experimentally for the red andesite ballast rock obtained from the Shahryar mine (Tehran province). Two disc-shaped samples subjected to three-point bending, namely semi-circular bend (SCB) and edge-notched disc bend (ENDB) are selected for conducting the tests and for each specimen 14 replicates were tested. Although a natural scatter was observed for the experimental results the failure probability curves of SCB and ENDB samples showed meaningful difference demonstrating the effect of testing method on mode I fracture behavior. Two- and three-parameter Weibull distribution curves were fitted to the fracture toughness and fracture energy results of andesite ballast rock tested with both specimens. By relating the Weibull distribution curves obtained for the ENDB and SCB samples to their geometries, the statistical fracture behavior curves of SCB were estimated theoretically in terms of the Weibull statistical curves of the ENDB specimen. In addition, the relationship between the statistical fracture toughness and fracture energy data obtained from the tested SCB and ENDB specimens made of andesite ballast rock was examined and it was shown that these two parameters are correlated well to each other as suggested by the framework of linear elastic fracture mechanics.
Highlights Two different mode I configurations were used for rock fracture studies.The effect of specimen geometry on KIc and GIc of andesite ballast rock was studied using Weibull statistical analysis.Two and three-parameter Weibull distribution curves were obtained for the fracture toughness and fracture energy results.The relationship between fracture toughness and strain energy release rate of tested rock samples was investigated statistically.
On the Statistical Prediction of KIc and GIc for Railway Andesite Ballast Rock Using Different Three-Point Bend Disc Samples
Aliha, M. R. M. (Autor:in) / Kosarneshan, K. (Autor:in) / Salehi, S. M. (Autor:in) / Haghighatpour, Pegah Jafari (Autor:in) / Mousavi, Amir (Autor:in)
2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
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