Issue 27

M.-P. Luong et alii, Frattura ed Integrità Strutturale, 27 (2014) 38-42; DOI: 10.3221/IGF-ESIS.27.05 42 The main interest of this energy approach is to unify microscopic and macroscopic test data. The parameter intrinsic dissipation under consideration is a scalar quantity, easy to evaluate accurately. Subsequently it may suggest multiaxial design criteria, highly relevant for full-scale testing on engineering rock structures. In conjunction with others testing techniques based on quite different physical nature, the proposed differential infrared thermography promotes the possibility of investigating more thoroughly the mechanical behavior of brittle geomaterials up to failure from different physical points of view. R EFERENCES [1] Bui, H.D., Fracture Mechanics. Inverse problems and solutions. Springer, (2006). [2] Dougill, J.W., Path dependence and a general theory for progressively fracturing solid, Proc. Roy. Soc. Lond., A, 319 (1983) 341-451. [3] Luong, M.P., Infrared thermographic observations of rock failure, in Comprehensive Rock Engineering, Principles, Practices & Projects, ed by J.A. Hudson, Pergamon Press, 4 (26) (1983) 715-730. [4] Liu, S., Wu, L., Wu, Y., Infrared radiation of rock at failure, Int. J. Rock Mech. & Min. Sci., 43 (6) (2006) 972-979. [5] Wu, L., Liu, S., Wu, Y., Precursos for rock fracturing and failure, I & 2, Int. J. Rock Mech. & Min. Sci., 43(3) (2006) 473-493. [6] Wu, L., Liu, S., Wu, Y., Wu, H., Changes in infrared radiation with rock deformation, Int. J. Rock Mech. & Min. Sci., 39(6) (2002) 825-831. [7] Kratochvil, J., Dillon, O.W. Jr., Thermodynamics of elastic-plastic materials as a theory with internal state variables, J. Appl. Phys., 40 (1969) 3207-3218. [8] Luong, M.P., Infrared thermographic scanning of fatigue in metals, Nuclear Engineering and Design, 158 (1995) 363- 376. [9] Luong, M.P., Introducing infrared thermography in soil dynamics, Infrared Physics and Technology, 49(3) (2007) 306-311. [10] Luong, M.P., Non-destructive testing of sports engineering: the use of infrared thermography, Materials in Sports Equipment, Ed.: Alexandar Subic, Woodhead Publishing in Materials, ISBN 978-1-84569-131-8, 2 (2007) 35-59.