The feasibility of predicting the fracture behavior of surface cracks from shallow cracked bend specimens was investigated. The material studied was a high-strength steel stress relief embrittled to various levels of Charpy-V notch impact toughness. Material toughness was quantified in terms of the J-intergral at total specimen failure (-/„,,), using both deeply notched and shallow-notched bend...

Experiments were performed to observe the fracture behavior of thin-wall and initially-flawed aluminum tubes to internal gaseous detonation loading. The pressure load, with speeds exceeding 2 km/s, can be characterized as a pressure peak (ranging from 2 to 6 MPa in these experiments) followed by an expansion wave. Flaws were machined as external axial surface notches. Cracks ran both in the ups...

This work shows the possibility of obtaining hybrid layered metal-polymer composites based on low-carbon steel and aluminum alloys with interlayers basalt fiber reinforced thermoplastic polymer — polyetheretherketone by methods hot cold bonding use curing adhesives, respectively. The adhesive tear shear strength obtained two alternative impact steel-polymer alloy-polymer joints were evaluated. ...

Lineage Analysis of Epidermal Stem Cells Maria P. Alcolea and Philip H. Jones and Collective Regenerative Behavior Macroenvironmental Regulation of Hair Cycling Maksim V. Plikus and Cheng-Ming Chuong Cutaneous Notch Signaling in Health and Disease Craig Nowell and Freddy Radtke Metagenomics and Molecular Microbiology Microbial Ecology of the Skin in the Era of Geoffrey D. Hannigan and Elizabeth...

a critical protection requirement for grid connected distributed generators (dg) is anti-islanding protection. in this paper, a new islanding detection method for any possible network loading is proposed based on utilizing and combining various system parameter indices. in order to secure the detection of islanding, eight intentional disturbances are imposed to the system under study in which t...