Crack propagation in welded stiffened panels

Distributions of residual stresses in stiffened plates with one and two stiffeners

“…The maximum tensile stress value (457 MPa) was found for the longitudinal stress component at the centre of the weld and the value was about 13% higher than the yield stress (405 MPa) of the plate specimen. This observation agrees well with previous studies (Dexter and Pilarski 2002;Price et al 2006); however, the current study found slightly higher stress values. This may be due to a variety of factors such as different types of specimens, or heat input used in the study as compared to previous studies.…”

“…Email: sdas@uwindsor.ca studies were also undertaken primarily to determine the longitudinal component of the residual stresses, i.e. the stress component in the direction of the weld and stiffener, in ship hull-stiffened plate specimens (Somerville et al 1977;Dexter and Pilarski 2002;Cho et al 2004). These studies were undertaken using conventional methods such as the hole-drilling method the sectioning method and the X-ray diffraction method.…”

“…This distribution was later improved by Faulkner (Faulkner 1975) to a triangular tensile zone with a peak tensile stress at the weld as shown in Figure 1c. The Faulkner model has been used by many other researchers for estimating longitudinal residual stress in ship hulls (Akhras et al 1998;Dexter and Pilarski 2002).…”

Buckling and post-buckling strength of shear panels degraded by near border cracks

“…Dexter and Pilarski [11] conducted a series of experiments to characterize large fatigue cracks in welded stiffened panels and confirmed that cracks propagate in a stable manner. Broz [12] discussed the influence of weld geometry factors upon fatigue cracks.…”

Optimization of spread mooring systems with Artificial Neural Networks

“…Many experiments verified the stability of long crack propagation in redundant structures (Dexter & Pilarski 2002). The experiment showed that welded stiffeners will slightly slow down an approaching crack.…”