TY - JOUR
T1 - Fatigue crack growth analysis of T junction under biaxial compressive-compressive loads
AU - Shen, Wei
AU - Yan, Renjun
AU - Barltrop, Nigel
AU - Song, Min
AU - Liu, Enqian
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The objective of the present research is to analyze systematically the effect of biaxial compressive-compressive stresses on crack growth behavior of T junctions. Pressure structures have many components which are designed to be compressively stressed. This paper describes and summarizes biaxial compressive fatigue crack initiation and propagation characteristics through several T junctions under biaxial fatigue tests. Unlike uniaxial compressive fatigue, multiaxial compressive-compressive fatigue has the intricate characteristics of multi-point crack initiating, short crack group growth behavior and long crack propagating behavior. Moreover, the effective stress intensity factor range Keff and the crack opening threshold Kop,max are used to explain the crack growth under biaxial loads instead of the Paris law. Predictions of fatigue crack growth behavior based on the extended McEvily formula agree well with experimental observations.
AB - The objective of the present research is to analyze systematically the effect of biaxial compressive-compressive stresses on crack growth behavior of T junctions. Pressure structures have many components which are designed to be compressively stressed. This paper describes and summarizes biaxial compressive fatigue crack initiation and propagation characteristics through several T junctions under biaxial fatigue tests. Unlike uniaxial compressive fatigue, multiaxial compressive-compressive fatigue has the intricate characteristics of multi-point crack initiating, short crack group growth behavior and long crack propagating behavior. Moreover, the effective stress intensity factor range Keff and the crack opening threshold Kop,max are used to explain the crack growth under biaxial loads instead of the Paris law. Predictions of fatigue crack growth behavior based on the extended McEvily formula agree well with experimental observations.
KW - biaxial compressive-compressive fatigue
KW - crack growth model
KW - crack propagation
KW - T junction
UR - http://www.scopus.com/inward/record.url?scp=84954496818&partnerID=8YFLogxK
UR - http://www.sciencedirect.com/science/journal/00137944
U2 - 10.1016/j.engfracmech.2015.09.053
DO - 10.1016/j.engfracmech.2015.09.053
M3 - Article
AN - SCOPUS:84954496818
SN - 0013-7944
VL - 154
SP - 207
EP - 224
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
ER -