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K Ic and K IIc measurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses
Author(s) -
Xiongzhou Yuan,
Yuze Tian,
Qinglin Liu,
Song Liu,
Qianwen Dou,
Aliha M.R.M.
Publication year - 2021
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13398
Subject(s) - fracture toughness , materials science , composite material , fracture (geology) , asphalt , enhanced data rates for gsm evolution , mixed mode , atmospheric temperature range , telecommunications , computer science , physics , meteorology
Pure mode I and mode II fracture toughness of asphalt mixture was investigated both experimentally and theoretically using vertical edge crack semicircular bend (SCB) specimen with symmetric and asymmetric bottom loading spans. The thickness of SCB specimen was considered in the range from 30 to 70 mm, and the fracture toughness tests were performed at three subzero temperatures (−5°C, −15°C and −25°C). The results showed that K Ic and K IIc are increased by reducing the test temperature. The thickness had no sound effect on the fracture toughness, but the thickness of 50 mm was more suitable for fracture study on this material. The fracture load of mode II specimen was significantly greater than the mode I fracture load at the same testing condition. The fracture toughness ratio ( K IIc / K Ic ) that varies in the range between 1 and 1.4 was predicted theoretically using three well‐known stress/strain‐based fracture criteria.