This study comparatively analyzed the behavior of elastic properties by aspect ratio ultra-high molecular weight polyethylene (UHMWPE) fibers that are added when creating a composite material polypropylene and UHMWPE. The volume fraction (VF) UHMWPE to was fixed at 5%. were lumped for analysis according oriented on matrix; they using Halpin–Tsai model, which involves theoretical approach finite...

Labor unions have a significant impact on the economy in the United States and rest of the world. Although membership rate in unions has declined slowly over the last few decades, there were over 15 million unionized wage and salary employees in the United States alone in the year 2004 (Bureau of Labor Statistics, 2005). In addition, almost 13% of manufacturing employees were unionized last yea...

2010 KTH accounts for one-third of Sweden's technical research and engineering education capacity at university level. Education and research cover a broad spectrum – from natural sciences to all the branches of engineering. Part of this work was performed a Innventia AB. Innventia AB is a world leader in research and development relating to pulp, paper, graphic media, packaging and biorefining...

Over the years, leadership has been studied extensively in various contexts and theoretical foundations. In some cases, leadership has been described as a process, but most theories and research on leadership look at a person to gain Leadership is typically defined by the traits, qualities, and behaviours of a leader. The study of leadership has spanned across cultures, decades, and theoretical...

Micromechanics models for the stiffness of aligned short-fiber composites are reviewed and evaluated. These include the dilute model based on Eshelby’s equivalent inclusion, the self-consistent model for finite-length fibers, Mori-Tanaka type models, bounding models, the Halpin-Tsai equation and its extensions, and shear lag models. Several models are found to be equivalent to the Mori-Tanaka a...

Meta-modeling is a well-known approach for capturing modeling methods and techniques. A meta-model can serve as a basis for quantitative evaluation of methods and techniques. By means of a number of formal metrics based on the meta-model, a quantitative evaluation of methods and techniques becomes possible. Existing meta-modeling languages and measurement schemes do not allow the explicit model...

This study evaluated the potential of using poly(lactic acid)/poly(e-caprolactone) (PLA/PCL) blends for fused filament fabrication (FFF) and assembly with pure PLA biomedical applications. PLA/PCL binary were meltblended in a twin-screw extruder at different ratios (20/80 to 80/20) then formed into filaments calibrated diameter FFF. The microstructure, surface properties, rheological mechanical...

in this study, the vibration behavior of functional graded (fg) circular and annular nanoplate embedded in a visco-pasternak foundation and coupled with temperature change is studied. the effect of in-plane pre-load and temperature change are investigated on the vibration frequencies of fg circular and annular nanoplate. to obtain the vibration frequencies of the fg circular and annular nanopla...