Abstract Using the method of singular integral equations, elastic-plastic problem for cracked Brazilian disk was solved. Based on Dugdale model and deformation fracture criterion, relationships between critical load, notch tip opening displacement length plastic strips were established. Also, comparison present solution finite domain known obtained semi-infinite in elastic plane performed.

This study evaluated epidemiological factors for HCV infection associated with sharing perforating and cutting instruments among candidates for blood donation (CBD) in the city of Belém, Pará, Brazilian Amazon. Two definitions of HCV infection cases were used: anti-HCV positivity shown by EIA, and HCV-RNA detection by PCR. Infected and uninfected CBD completed a questionnaire about possible ris...

Background: Linear elastic fracture mechanics (LEFM) applies to sharp cracks, although crack sites such as holes and slots are often blunt cracks with nonzero widths. The advancement in finite element method (FEM) has enabled the calculation of stress intensity factor (SIF) for unstable growth prediction, regardless shape size, but calculations differ from contour co...

Objective: The aim of this review is to describe the historical development of research on cannabidiol. Method: This review was carried out on reports drawn from Medline, Web of Science and SciELO. Discussion: After the elucidation of the chemical structure of cannabidiol in 1963, the initial studies showed that cannabidiol was unable to mimic the effects of Cannabis. In the 1970’s the number o...

The mechanical properties of porous ceramics are greatly influenced by their microstructure. Therefore, mechanical behavior of highly porous ceramics is different from that of dense ceramics. In this work, we evaluate different mechanical testing methods such as static compression, Brazilian disc test and 3-point bending on their suitability for comparison of highly porous ceramic materials. It...

‘Terigas’ mandarin is one of the cultivars cultivated in almost all Indonesia’s provinces. However, this cultivar prone to cracking, and little research has been conducted on fruit cracking Indonesia. The goal study was determine effect peel anatomy, leaf nutrient content, quality cultivar. A Completely Block Design (CBD) with three replications used. Results showed that thickness uncracked big...

A new test method has been developed to measure the resistance of dynamic fracture initiation in brittle materials under combined mode I/I loadings. The Brazilian disks with center-cracks have been fractured under oblique impact loadings in diarnetral-compression. The dynamic stress intensity factors of mode I and H are evaluated from the superposition integrals of the step response functions f...

This experimental work investigates the hydraulic behavior of a macro-cracked concrete, in order to improve the understanding of the coupled effects of temperature and water saturation. A concrete sample is macro-cracked using the Brazilian test technique. It is then submitted to dry or wet gas flow at different temperatures and confining pressures and its permeability is recorded. This first p...