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A better way to size bolts
Just about every product has several parts connected by bolts, screws, or pins. CosmosWorks requires that users identify a few items such as faces the bolts will contact, a bolt diameter, and material. The bolt-sizing features appear in CosmosWorks 2005 and soon in CosmosDesignStar 2006. Software
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The nuts and bolts of ceramic fasteners
Few fasteners can beat threaded ceramics nuts and bolts when it comes to withstanding heat, pressure, and corrosive environments. Just don't torque them too tight. A wide variety of ceramic nuts, bolts, and washers can be made out of alumina or zirconia. Green or unfired bolts are longer than
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Find the load, then size the bolts
of using FEA to determine reactions at bolts. "I recommend working through a few sample or warm-up problems with textbook solutions before tackling the real one. This problem simulates a 300-lb load on a bracket and tube. The task is to estimate reactions at the four mounting locations so bolts can
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Superstrong nuts and bolts
reinforced with long-carbon fibers, Icotec's lightweight nuts and bolts sport ultrahigh specific strengths of up to 2.4 million psi/lb/in.3 This contrasts to aluminum and titanium with specific strengths of about 0.2 million and 1.2 million psi/lb/ in.3, respectively. The composite's semicrystalline
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Simulating bolts in finite-element assemblies
Finite-element models occasionally involve bolts and their preload. They can complicate analysis because even small assemblies can have bolts, screws, rivets, and weld joints, some with preloads. Still, there are ways to consider fastener reactions, says David Dearth, analyst and president
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Making light work of big bolts
be specially designed or made of exotic materials, however, it can rapidly become more economical to go with MJTs. And in cases of larger bolts, or covered and acorn nuts, MJTs cost about the same or less. Most often, it is less equipment downtime, not purchase price that tips the economic scale in MJTs
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U.S. Army green lights tension-indicating bolts
Bolts that tell you when they're tight can simplify maintenance. Condition-based maintenance (CBM) greatly improved reliability and readiness of Apache helicopters, according to a recent study. So the U.S. Army has decided to apply the technology to its entire fleet of Apache, Blackhawk
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The Nuts and Bolts of Hardness Testing
help prevent potential major problems down the line. Quality Digest Magazine. The Nuts and Bolts of Hardness Testing. Case Study: Designing for Quality. Wake Up Your Management Review. SPC Software Roundup. Quality Conversation With John Heer. ISO 13485 Levels the Playing Field. 2004 Gages Directory