Faced with the need to join aluminum to aluminum and aluminum to steel, GM and Ford have been forced to find alternatives to the tried-and-true spot welding technology they had been using for decades to join all-steel assemblies. Friction-drilling screws are one such alternative.
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Piezoelectric materials can generate a voltage when they are under mechanical stress. The piezoelectric filaments of the washer will be connected to a handheld device that registers the amount of preload, or bolt clamping force, by reading the intensity of electrical outputs. This breakthrough will be beneficial to areas where the right preload is crucial such as construction, automobile assembly, nuclear power, racing, aviation and space.
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With less than a week until the fastener industry’s biggest trade show, The National...
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Find out more about new flexible fasteners created by Cal Poly’s Saeed Niku and his students...
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