DENG Ping, WANG Wei, WANG Shuqi, et al. Numerical study on J-integral of HR3C heating surface with micro-cracks for ultra supercritical boilers[J]. Thermal power generation, 2014, 43(3): 58-64.
DENG Ping, WANG Wei, WANG Shuqi, et al. Numerical study on J-integral of HR3C heating surface with micro-cracks for ultra supercritical boilers[J]. Thermal power generation, 2014, 43(3): 58-64.DOI:
stress and strain on HR3Cheating surface with radial cracks for ultra supercritical boilers was conducted
at different temperatures and pressures.Moreover
the area of plastic region was estimated
according to distribution of plastic strain occurred within the crack tip area.Finally
by defining four different integral loops at the crack tip
the J-integral values were calculated.The results show that
the stress mutation occurred at the crack tip and was easy to yield;the area of the crack tip plastic zone belonged to the same level as the feature size of the crack zone;both the pressure and temperature had effects on the fracture parameter J