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Fracture process zone in notched concrete beam under three-point bending by acoustic emission
Highlights Investigation of fracture process zone in concrete by AE-SiGMA. Fracture energy varies with two parameters of notch depth and maximum size of aggregate. The opening crack (mode I crack) mostly generates when the notch depth becomes higher. Fracture energy correlates with the width of AE cluster.
Abstract Investigation on fracture process zones in notched concrete beams under three-point bending is performed by applying acoustic emission (AE). The tests were conducted on beam specimens with different notch depths and the maximum sizes of aggregate in concrete to clarify the generation mechanisms of micro-cracks in the fracture process zone. SiGMA (simplified Green’s functions for moment tensor analysis) procedure was applied to analyze AE signals. The experimental results show the fracture energy increases with increase in the maximum size of aggregate. It is found that dominant motions of micro-cracks vary with the notch depth, regardless of the maximum size of aggregate. The widths of the fracture process zone were estimated from results of AE source location. It is confirmed that the fracture energy correlates with the width of AE cluster, as the energy increase when the width of fracture process zone expands.
Fracture process zone in notched concrete beam under three-point bending by acoustic emission
Highlights Investigation of fracture process zone in concrete by AE-SiGMA. Fracture energy varies with two parameters of notch depth and maximum size of aggregate. The opening crack (mode I crack) mostly generates when the notch depth becomes higher. Fracture energy correlates with the width of AE cluster.
Abstract Investigation on fracture process zones in notched concrete beams under three-point bending is performed by applying acoustic emission (AE). The tests were conducted on beam specimens with different notch depths and the maximum sizes of aggregate in concrete to clarify the generation mechanisms of micro-cracks in the fracture process zone. SiGMA (simplified Green’s functions for moment tensor analysis) procedure was applied to analyze AE signals. The experimental results show the fracture energy increases with increase in the maximum size of aggregate. It is found that dominant motions of micro-cracks vary with the notch depth, regardless of the maximum size of aggregate. The widths of the fracture process zone were estimated from results of AE source location. It is confirmed that the fracture energy correlates with the width of AE cluster, as the energy increase when the width of fracture process zone expands.
Fracture process zone in notched concrete beam under three-point bending by acoustic emission
Ohno, Kentaro (author) / Uji, Kimitaka (author) / Ueno, Atsushi (author) / Ohtsu, Masayasu (author)
Construction and Building Materials ; 67 ; 139-145
2014-05-09
7 pages
Article (Journal)
Electronic Resource
English
Fracture process zone of notched three-point-bending concrete beams
| Tema Archive | 1999
Fracture process zone of notched three-point-bending concrete beams
| British Library Online Contents | 1999
Fracture process zone of notched three-point-bending concrete beams
| Online Contents | 1999