TY - JOUR
T1 - A new fracture area method for predicting the growth of a newly coalesced crack in AA7050-T7451 aluminium alloy
AU - Tan, James
AU - Chen, Bernard
PY - 2015
Y1 - 2015
N2 - A period of crack growth retardation after coalescence of a pair of cracks, propagating under constant amplitude cyclic loading, has been found in previous studies. In this study, quantitative fractography has been used to examine the evolving shapes and sizes of the fracture area of a newly coalesced crack. The size of the remaining area required for two coalesced cracks to form a single semi elliptical crack was found to be associated with the period of crack growth retardation . Based on this relationship, a new fracture area method has been formulated in which accounts for the period of crack growth retardation of a coalesced crack. The crack growth of the newly coalesced crack predicted using the new method agreed well with experimental data.
AB - A period of crack growth retardation after coalescence of a pair of cracks, propagating under constant amplitude cyclic loading, has been found in previous studies. In this study, quantitative fractography has been used to examine the evolving shapes and sizes of the fracture area of a newly coalesced crack. The size of the remaining area required for two coalesced cracks to form a single semi elliptical crack was found to be associated with the period of crack growth retardation . Based on this relationship, a new fracture area method has been formulated in which accounts for the period of crack growth retardation of a coalesced crack. The crack growth of the newly coalesced crack predicted using the new method agreed well with experimental data.
UR - http://www.sciencedirect.com/science/article/pii/S0167844214200103/pdfft?md5=d62ce85ab544247253f4d18938c09e94&pid=1-s2.0-S0167844214200103-main.pdf
U2 - 10.1016/j.tafmec.2014.12.003
DO - 10.1016/j.tafmec.2014.12.003
M3 - Article
SN - 0167-8442
VL - 75
SP - 146
EP - 150
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
ER -