INTRODUCTION Although fatigue has been implicated in cartilage failure, there are only two published studies in this area, by the same author. However, in these previous studies cartilage was tested in the direction parallel to that of collagen orientation in the superficial layer, where it possesses greater tensile strength. In the present work, articular cartilage was also tested along the di...

We have performed a comprehensive first-principles study of the electronic and magnetic properties of two-dimensional (2D) transition-metal dichalcogenide (TMD) heterobilayers MX2/MoS2 (M = Mo, Cr, W, Fe, V; X = S, Se). For M = Mo, Cr, W; X = S, Se, all heterobilayers show semiconducting characteristics with an indirect bandgap with the exception of the WSe2/MoS2 heterobilayer which retains the...

Detection and localization of fatigue cracks originating from fastener holes is an important application of proposed systems for structural health monitoring (SHM). However, detection of even large fatigue cracks using ultrasonic guided waves can be challenging when cracks are tightly closed, which is common in the absence of applied tensile loads. It can also be problematic to detect fatigue c...

OBJECTIVE This study tests a model of how pain and fatigue, independently or in combination, relate to school functioning in pediatric cerebral palsy (CP). METHODS One hundred eighty-nine parents of children with CP completed the Pediatric Quality of Life Inventory (PedsQL) 4.0 Generic Core Scales and the PedsQL 3.0 Cerebral Palsy Module. Seventy-three children with CP completed the PedsQL. P...

Ultrasonic peening treatment (UPT) as a method of severe plastic deformation was used to treat cruciform welded joints of Q345 steel. The application of UPT achieves material surface nanocrystallization of the peening zone, reduces stress concentration, and produces residual compressive stresses at the welded toe. Micro-structure, hardness, stress relief, S-N curve, and the fatigue fracture mec...

An experimental study was conducted to examine the mechanical strengths of concretes with straight high-strength knurled polypropylene macrofibers. Incidences concrete were determined for three different fiber dosages and lengths. In addition, compressive, indirect-splitting-test tensile, flexural through testing. The results showed no statistically significant correlation between volume length...

this paper presents a finite element analysis and its related experimental test of corrugated steel web beams subjected to fatigue loading. a particular focus in this study was set on the fatigue failure arising from the web-to-flange welded joint of the corrugated steel web beam. a detailed three-dimensional finite element model which explicitly includes the geometry of the web-to-flange welds...

In this paper, it was performed physical, mechanical, and microscopic analyzes on samples of industrial waste foundry sand (WFS) hot mix asphalt mixtures (HMA) containing WFS as fine aggregate. The HMA produced replacing 50 100 % the aggregate (passing 4.38 mm by sieve) (by weight) with a dense gradation suitable for pavement course layers. A “control” mixture used without WFS. results typical ...

Many steel rope systems are subjected to fluctuating tensile loads and therefore can fail due fatigue. Available fatigue test data indicate that diameter, mean stress, socket type, lay angle length influence the resistance. Most of tests were terminated before full failure ropes. This paper shows termination criterion, such as fracture first wire, 5 % wires or fracture, has a large on resulting...

OBJECTIVE To evaluate a multidimensional model testing disease activity, mood disturbance, and poor sleep quality as determinants of fatigue in patients with rheumatoid arthritis (RA). METHOD The data of 106 participants were drawn from baseline of a randomized comparative efficacy trial of psychosocial interventions for RA. Sets of reliable and valid measures were used to represent model con...