In this study, the influence of different weight percentages of glass fiber (GF) reinforcement on the mechanical properties of nylon (PA6) composite is investigated. Test specimens of pure nylon, 95% nylon + 5% GF, 90% nylon + 10% GF, 85% nylon + 15% GF and 80% nylon + 20% GF are prepared using an injection molding machine. In the experiments, tensile tests and impact tests are carried out. The...

Cold rolling with subsequent annealing can be used to produce the recrystallized structure in high entropy alloys (HEAs). The Al0.25CoCrFeNi HEAs rolled to different final thickness (230, 400, 540, 800, 1000, 1500 μm) are prepared to investigate their microstructure evolutions and mechanical behaviors after annealing. Only the single face-centered cubic phase was obtained after cold rolling and...

An extensive literature covering the last 50 years has shown that all structural and bridge steels are potentially susceptible to strain aging. The most damage is done by cold strain itself. Strains in the 5% to 18% range can typically increase yield strength by 70% and typically increase tensile strength by 35%. Over the same strain range, tensile elongation will typically decrease by 30%. The...

This study investigates the sensitivity of design variables such as ultimate strength of concrete, yield stress of reinforcing steel and damping ratio to the seismic response of staggered wall structures. Two different methods for sensitivity analysis, the tornado diagram method and the first-order second-moment method, are applied to two types of model structures. Non-linear dynamic analyses a...

Increasing demand for energy and reduction of carbon dioxide emissions has revived interest in nuclear energy. Designing materials for radiation environments necessitates a fundamental understanding of how radiation-induced defects alter mechanical properties. Ion beams create radiation damage efficiently without material activation, but their limited penetration depth requires small-scale test...

The manipulation of sink to source relations has been subject to extensive plant breeding programs aiming to improve harvest index and thereby crop yield. The introduction of molecular and biochemical tools has enabled scientists to investigate the underlying principles. This has opened up the fascinating possibility of identifying molecular determinants of sink strength and to further increase...

Spider silk shows great potential as a biomaterial: in addition to biocompatibility and biodegradability, its strength and toughness are greater than native biological fibres (e.g. collagen), with toughness exceeding that of synthetic fibres (e.g. nylon). Although the ultimate tensile strength and toughness at failure are unlikely to be limiting factors, its yield strain of 2% is insufficient, ...

[1] Slow spreading ridge segments are characterized not only by small, closely spaced faults that develop near the segment center but also by large, widely spaced faults that develop near the segment ends, typically at the inside corner of a ridge-offset intersection. In this study we investigate the competing effects of stress accumulation in the lithosphere and the yield strength of the litho...

Cold roll forming (CRF) is a bending process where the bending occurs gradually in severalforming steps from an undeformed strip to a finished profile. The process is very interesting for thesheet metal industry due to the high speed in which the profile can be produced. High strength steelhas, in recent years, become more common in CRF. These materials have advantages but also<...