Track topics on Twitter Track topics that are important to you
Molecular dynamics (MD) simulation studies are carried out to investigate the crack propagation behavior and crack-void interactions in Al coated with CuZr metallic glass (MG) thin film model. The model thin film is subjected to mode I and mode II loading conditions at a temperature of 300 K and a strain rate of 10 s. The simulations are carried out in the framework of EAM (embedded atom method) potential based on the CZM (cohesive zone model). The model size is 435 Å (x-axis) × 174 Å (y-axis) × 17 Å (z-axis). Nine models are investigated containing an edge crack (length, L = 43 Å, and 118 Å) located at the interface and voids (diameter, ϕ = 10-36 Å) located in the Al region and at the interface. The results show that crack propagation occurs by dislocation emission and blunts the crack tip. The presence of void ahead of the crack tip restricts the crack propagation due to the stress field resulting in bowing out of the crack and is effective with an increase in the void size which grows normal and parallel to the loading direction. The estimated crack speeds in mode I and mode II are 366 m/s and 370 m/s during stable crack growth. Separation of the interface occurs by fracture of the ligaments between the voids. Shockley partial dislocations are found nucleating from the void surfaces; twinned regions are found between the voids. The work of separation is found to be 11.56 J/m for mode I and 3.7 J/m in mode II, indicating that failure occurs in mode II. Graphical abstract.
This article was published in the following journal.
Name: Journal of molecular modeling
This study uses a cracked medium to study the interaction mechanism between blast waves and the precrack. The experimental results show that the compressive phase of the dilatational wave would cause ...
We study the interplay between a crack tip slowly propagating through a hydrogel and nanoparticles suspended in its liquid environment. Using a proteinic gel enables us to tune the electrostatic inter...
The study objective was to: (1) quantify symptom (pain) and crack changes during one year of follow-up, among teeth that had at least one visible crack at baseline but which did not receive treatment ...
A theory of the two-photon florescence for a metallic nanoshell in the presence of quantum emitters has been developed. The metallic nanoshell is made of a metallic nanosphere as a core and a dielectr...
Flexoelectricity is especially relevant for nanoscale structures and it is expected to be largest at the tip of cracks. We demonstrate the presence of a huge flexoelectric polarization at crack tips i...
The purpose of this study is to determine the effects of selegiline on the subjective and physiological effects of cocaine challenge in chronic crack abusers, and to evaluate clinical safe...
[Development of diagnosis algorism for paroxysmal arrhythmia using ultra-thin resistive membrane: a pilot study] Comparison of blood pressure via tunable crack sensor and invasive pressure...
Crack addiction has become a severe public health problem in Brazil. Crack users present elevated prevalence rates of psychiatric comorbidities, sexual transmitted infections and unemploym...
Clinical Evaluation of Patients With Everolimus-eluting Stent Xience V® Implanted in the Treatment of Restenosis in Non-coated Metallic Stent (BMS In-stent Restenosis) During a 2 Year Clinical Follow-up Period
Interventional, prospective, non-randomized, non-comparative, open and multicentric study of patients with everolimus-eluting stent " Xience V® " implanted in the treatment of restenosis ...
The purpose of this study is to test metallic markers in the breast tissue after breast conserving surgery and to observe the metallic markers' stability in the breast for use as tumor bed...
The purified, alkaloidal, extra-potent form of cocaine. It is smoked (free-based), injected intravenously, and orally ingested. Use of crack results in alterations in function of the cardiovascular system, the autonomic nervous system, the central nervous system, and the gastrointestinal system. The slang term "crack" was derived from the crackling sound made upon igniting of this form of cocaine for smoking.
Specialized regions of the cell membrane composed of pits coated with a bristle covering made of the protein CLATHRIN. These pits are the entry route for macromolecules bound by cell surface receptors. The pits are then internalized into the cytoplasm to form the COATED VESICLES.
TRANSPORT VESICLES formed when cell-membrane coated pits (COATED PITS, CELL-MEMBRANE) invaginate and pinch off. The outer surface of these vesicles is covered with a lattice-like network of COP (coat protein complex) proteins, either COPI or COPII. COPI coated vesicles transport backwards from the cisternae of the GOLGI APPARATUS to the rough endoplasmic reticulum (ENDOPLASMIC RETICULUM, ROUGH), while COPII coated vesicles transport forward from the rough endoplasmic reticulum to the Golgi apparatus.
Vesicles formed when cell-membrane coated pits (COATED PITS, CELL-MEMBRANE) invaginate and pinch off. The outer surface of these vesicles is covered with a lattice-like network of the protein CLATHRIN. Shortly after formation, however, the clathrin coat is removed and the vesicles are referred to as ENDOSOMES.
Tablets coated with material that delays release of the medication until after they leave the stomach. (Dorland, 28th ed)
Adhd Anorexia Depression Dyslexia Mental Health Psychiatry Schizophrenia Stress Mental health, although not being as obvious as physical health, is very important, causing great unhappiness to those affected, causing add...
Osteoporosis is a disease in which the bones become extremely porous, are subject to fracture, and heal slowly, occurring especially in women following menopause and often leading to curvature of the spine from vertebral collapse. Follow and track&n...
A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including Arthritis - inflammation of a joint causes pain, stiffness, and swelling with ...