Fatigue crack growth in Al 2024 and 7050 specimens was assessed experimentally numerically. In the experimental investigation, various specimen configurations loading conditions were used to achieve pure mode I, II, mixed I/II, I/III, I/II/III. Sample as follows: first, compact tension shear (CTS) reproduce mode-I initial mode-II conditions; second, surface (SCT) analyze behavior of semiellipti...

Delamination is a critical form of failure in composite laminates which is partitioned into a combination of three pure modes namely; opening, shearing and tearing (modes I, II and III respectively). Each fracture mode contributes to the total energy required for delamination growth, due to a combination of the different damage mechanisms that occur under each mode 1-2 . To formulate reliable m...

Natural and artificial materials including rocks and cement-based materials such as concrete and cement mortar are affected both physically and chemically by various natural factors known as weathering factors. The freeze-thaw process, as a weathering factor, considerably affects the properties of rocks and concrete. Therefore, the effect of the freeze-thaw process on the physical and mechanica...

Many delamination failure criteria based on fracture toughness have been suggested over the past few decades, but most only covered the region containing mode I and mode II components of loading because that is where toughness data existed. With new analysis tools, more 3D analyses are being conducted that capture a mode III component of loading. This has increased the need for a fracture crite...

Interlaminar fracture mechanics has proven useful for characterizing the onset of delaminations in composites and has been used with limited success primarily to investigate onset in fracture toughness specimens and laboratory size coupon type specimens. Future acceptance of the methodology by industry and certification authorities however, requires the successful demonstration of the methodolo...

In this paper, we study the impact of low-quality node on the performance of incremental least mean square (ILMS) adaptive networks. Adaptive networks involve many nodes with adaptation and learning capabilities. Low-quality mode in the performance of a node in a practical sensor network is modeled by the observation of pure noise (its observation noise) that leads to an unreliable measurement....

We have developed a pseudoelastic wave equation describing pure pressure waves propagating in elastic media. The pressure-mode (P-mode) uses all of the parameters (such as density and P- S-wave velocities). It produces same amplitude variation with offset (AVO) effects PP-reflections computed by conventional equation. Because new is free S-waves, it does not require finer grids for simulation. ...