The purpose of this research is to analyse the long-term deformations reinforced concrete beams made recycled coarse aggregates (RCA), using four different replacement ratios, 0%, 20%, 50% and 100%. For said purpose, three loading stages were carried out: firstly, sustained load for 1300 days, secondly, unloading recovery where registered over a one year period, lastly, testing up failure in or...

This study investigates the fatigue damage evolution mechanisms of D2 wheel steel under high-cycle uniaxial and multiaxial loading conditions, with a focus on determining crack growth threshold (FCGT). Uniaxial FCGT tests were performed pre-cracked specimens subjected to high-frequency cyclic at stress ratios (R) 0.1. The results indicate that for conditions ranges between 8–9 MPa.m0.5, while i...

It has been observed during fatigue cracking of AA 7075-T651 that a small percentage of Al7Cu2Fe particles crack during manufacturing or very early in their life. Some of the cracked particles eventually nucleate cracks into the surrounding microstructure, and among these the number of cycles required for nucleation varies widely. It is important to comprehend the mechanics underpinning the obs...

to compare three various methods in the diagnosis of dentinal cracks formed in the apical third after root resection.one hundred extracted human maxillary central incisors were selected. the root canals were prepared with step-back technique. then 3mm from the apical end of all roots was cut perpendicular to the long axis of the tooth. the apical end of each root was evaluated to make sure ther...

We develop an economic model of an offline password cracker which allows us to make quantitative predictions about the fraction of accounts that a rational password attacker would crack in the event of an authentication server breach. We apply our economic model to analyze recent massive password breaches at Yahoo!, Dropbox, LastPass and AshleyMadison. All four organizations were using key-stre...

Introduction: Cracked tooth is a current hard tissue affection; the type of cracks directly affects selection treatment and restoration.Objective: To evaluate literature about cracked Tooth, its etiology, symptoms, diagnosis treatment.Methodology: A review was carried out in databases Scopus, PubMed Google Scholar with keywords

The purpose of this study is to investigate bending moment and the axial load capacity of a pressurized pipe suffering from a through-wall circumferential crack repaired by a composite sleeve. The three-dimensional finite element method (FEM) was adopted to compute the results, and the failure assessment diagram (FAD) was employed to investigate the failure behavior of the repaired pipe. The fi...