[9] GU Q H, MA Q, TAN Y L, et al. Acoustic emission characteristics and damage model of cement mortar under uniaxial compression[J]. Construction and Building Materials, 2019, 213: 377-385.
[10] LI S T, FAN X Q, CHEN X D, et al. Development of fracture process zone in full-graded dam concrete under three-point bending by DIC and acoustic emission[J]. Engineering Fracture Mechanics, 2020, 230: 106972.
[11] DAI S H, LIU X L, NAWNIT K. Experimental study on the fracture process zone characteristics in concrete utilizing DIC and AE methods[J]. Applied Sciences, 2019, 9(7): 1346.
[12] ZHANG Y, SHI J F, ZHENG J Y. A method of fracture toughness JIC measurement based on digital image correlation and acoustic emission technique[J]. Materials & Design, 2021, 197: 109258.
[13] SKARYN'SKI , TEJCHMAN J. Experimental investigations of fracture process using DIC in plain and reinforced concrete beams under bending[J]. Strain, 2013, 49(6): 521-543.
[14] Anonymous. Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams[J]. Materials and Structures, 1985, 18(4): 287-290.
[15] HU X Z, DUAN K. Influence of fracture process zone height on fracture energy of concrete[J]. Cement and Concrete Research, 2004, 34(8): 1321-1330.