Composites are more and more increasing their importance as one of the most interesting group of materials, because of their unique properties. Hole drilling operations are common in composite parts to facilitate fastener assembly. As composites are non-homogeneous this operation causes some damages like delamination and others that reduce bearing and fatigue strength of the composite part. A p...

The guardrail is an indispensable part of ballasted track structures on bridges. In order to reveal its influence the track–bridge interaction continuous welded rail (CWR), longitudinal resistance model fastener and influential factors are established through tests. By taking a girder bridge (CGB) for railways as example, stock rail-guardrail-sleeper-bridge-pier integrated simulation developed....

Inflatable plstic splints have been in use for some time in the United States for the emergency splinting of fracures;t are also gaining popularity in casualty departmentsand clinics in the United Kingdom. Splints of this type cost essentially of a double-walled trAhsparent plastic jacket with a slide fastener and a screw valve in the outer _wa for tion (Pig,,1). The jacket is placed on the lim...

Eddy current inspection is widely used in nondestructive evaluation to detect cracks in metal structures. The impedance plane measurement response collected using our motion controlled eddy current inspection system, are used in the analysis. A scalar reduction from the impedance plane response is used to minimize human-factor variation. We apply a noise interference model to the data from a la...

The detection, location, and sizing of a fatigue crack emanating from a fastener hole in an aluminum plate is investigated. Two linear arrays of surface mounted piezoelectric disk transducers send and receive ultrasonic guided waves that are transmitted, reflected, and scattered by both the joint geometry and the fatigue crack. A tomography algorithm is used to detect and locate the crack. Ampl...

Applications of a new model for predicting power threaded-fastener-driving tool operator response and capacity to react against impulsive torque reaction forces are explored for use in tool selection and ergonomic workplace design. The model is based on a mechanical analog of the human operator, with parameters dependent on work location (horizontal and vertical distances); work orientation (ho...

This study presents findings for the strength and failure mechanism of a 3D-printed Continuous Carbon Fibre reinforced Onyx (CCF/Onyx) Thermo-Plastic Composite Fastener (TPCF) single lap-joint (SLJ) made fibre/polymer composite by TPCF. The was carried out numerical analysis experiment methods including test sample design, manufacturing process mechanical test. fasteners were manufactured teste...

The rail fastening system is an important part of a high-speed railway track. It is always critical to the operational safety and comfort of railway vehicles. Therefore, the condition detection of the rail fastening system, looseness or absence, is an important task in railway maintenance. However, the vision-based method cannot identify the severity of rail fastener looseness. In this paper, t...