15 research outputs found
Mechanical Properties of Coal Ash Particle-Reinforced Recycled Plastic-Based Composites for Sustainable Railway Sleepers
This experimental research investigates the mechanical properties of municipal plastic waste-based particulate composites reinforced with coal ash (CA), the by-product of thermal power plants, for sustainable railway sleepers. Six series of sustainable composites filled with inorganic mineral fillers, including CA, were prepared by a twin-screw extruder and a compression molding machine. The effect of mix design variables-such as filler type, contents and the particle size of the filler-on mechanical properties-including tensile, compression and flexural properties-and morphology were characterized. The scanning electron microscopy (SEM) was employed to examine the morphology of the composites, which revealed the uniform dispersion of fillers in the polymer matrix. The study results conclude that the recycled plastic-based composite with the addition of CA up to 60% is suitable for railway sleeper applications. This experimental study may provide new insight into the railway applications of the developed composites under service loading conditions including traffic loading and earthquake
Determination of strength and deformation behavior of human cartilage for the definition of significant parameters
Morphologie-ZĂ€higkeits-Korrelationen an modifizierten Epoxidharzsystemen mittels bruchmechanischer PrĂŒfmethoden an MiniaturprĂŒfkörpern
Influence of Hygrothermal Aging on Poissonâs Ratio of Thin Injection-Molded Short Glass Fiber-Reinforced PA6
The hygrothermal aging of short glass fiber-reinforced polyamide 6 materials (PA6 GF) represents a major problem, especially in thin-walled components, such as in the automotive sector. In this study, therefore, the thickness and the glass fiber content of PA6 GF materials were varied and the materials were exposed to hygrothermal aging. The temperature and relative humidity were selected in the range from â40 °C up to 85 °C, and from 10% up to 85% relative humidity (RH). In the dry-as-molded state, the determined Poissonâs ratio of the PA6 GF materials was correlated with the fiber orientation based on computer tomography (MicroCT) data and shows a linear dependence with respect to the fiber orientation along and transverse to the flow direction of the injection molding process. With hygrothermal aging, the value of Poissonâs ratio increases in the flow direction in the same way as it decreases perpendicular to the flow direction due to water absorption