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Viewing 1 to 30 of 1096
2016-04-05
Journal Article
2016-01-0497
Brian Falzon, Wei Tan
Abstract The development of the latest generation of wide-body carbon-fibre composite passenger aircraft has heralded a new era in the utilisation of these materials. The premise of superior specific strength and stiffness, corrosion and fatigue resistance, is tempered by high development costs, slow production rates and lengthy and expensive certification programmes. Substantial effort is currently being directed towards the development of new modelling and simulation tools, at all levels of the development cycle, to mitigate these shortcomings. One of the primary challenges is to reduce the extent of physical testing, in the certification process, by adopting a ‘certification by simulation’ approach. In essence, this aspirational objective requires the ability to reliably predict the evolution and progression of damage in composites. The aerospace industry has been at the forefront of developing advanced composites modelling tools.
2008-04-14
Journal Article
2008-01-0545
Sayed A. Nassar, Xianjie Yang, Saravanan Ganeshmuthy
In this paper, an emphasis is put on describing the elastic and plastic deformation behavior of the bolted joint. The bolt material is assumed to be plastic hardening. A nonlinear combined stress model is established for a typical bolted joint for the purpose of studying its behavior under a yield tightening. The combined effect of axial and torsional stresses in the tightened threaded fastener is considered. A new approach for yield tightening under ideal plastic bolt was proposed, and the effects of the thread and bearing frictional coefficients on the clamp load prediction are evaluated. The prediction precision of deformation behavior of the bolted joint under yield tightening for the strain hardening bolt material are studied experimentally.
2010-09-01
Magazine
New resins, new attributes The past decade has seen an explosion of new engineering plastics that have, inch by inch, penetrated into tougher and tougher aerospace applications.
2012-06-13
Magazine
The big boys go for plastic While it is true that the latest developments in advanced alloy manufacturing techniques can deliver structures and components that meet all the product requirements that aerospace primes need for new aircraft, there can be no escaping the fact that there is now an unstoppable momentum building up for the plastic airplane.
2012-08-31
Magazine
ETS Baja parts failure analysis: Geared for success When the ETS Baja team had to withdraw from the Baja Auburn 2012 event due to abnormal gear failure, an extensive analysis was required to ensure that problems of this nature would not surface again. After some serious investigation, the conclusion of almost 30 hours of research was unexpected and proved surprisingly simple. Body and soul rule at 2012 Formula SAE Months before the Formula SAE Michigan competition in May, teams were hashing out product development decisions. The end-game was presenting a racecar that had the right stuff for earning high points in the challenge's vehicle design evaluation as well as the acceleration, skid pad, endurance, and autocross dynamic performance events.
CURRENT
2011-08-25
Standard
AMS3271B
This specification covers a polychloroprene-coated, one side only, nylon knit in the form of cloth.
HISTORICAL
2011-08-25
Standard
AMS3271
This specification covers a polychloroprene-coated, one side only, nylon knit in the form of cloth.
HISTORICAL
2011-08-25
Standard
AMS3272
This specification and its supplementary detail specifications cover a woven nylon cloth coated with polyether (EU) urethane which is thermally, radio frequency, or ultrasonically sealable and having air holding characteristics.
HISTORICAL
1990-07-01
Standard
AMS3271A
This specification covers a polychloroprene−coated, one side only, nylon knit in the form of cloth.
HISTORICAL
1990-07-01
Standard
AMS3272A
This specification and its supplementary detail specifications cover a woven nylon cloth coated with polyether (EU) urethane.
CURRENT
2011-08-25
Standard
AMS3272B
This specification and its supplementary detail specifications cover a woven nylon cloth coated with polyether (EU) urethane.
HISTORICAL
1994-04-01
Standard
AMS3899A
This specification and its supplementary detail specifications cover carbon fibers in the form of tape and sheet impregnated with heat-activated, formable, thermoplastic polysulfone resin.
HISTORICAL
1993-10-01
Standard
AMS3899B
This specification and its supplementary detail specifications cover carbon fibers in the form of tape and sheet impregnated with heat-activated, formable, thermoplastic polysulfone resin.
HISTORICAL
1975-06-01
Standard
AMS3898/3
This specification covers one type of paper coated on both sides with polyethylene film in the form of rolls of sheeting or reels of unperforated tape of the width specified.
CURRENT
1994-02-01
Standard
AMS3898/3B
This specification covers one type of paper coated on both sides with polyethylene film in the form of rolls of sheeting or reels of unperforated tape of the width specified.
HISTORICAL
1991-10-01
Standard
AMS3898/3A
This specification covers one type of paper coated on both sides with polyethylene film in the form of rolls of sheeting or reels of unperforated tape of the width specified.
HISTORICAL
1975-06-01
Standard
AMS3898/5
This specification covers one type of paper, coated on both sides with polyethylene film, of the width specified herein.
CURRENT
1994-02-01
Standard
AMS3898/5B
This specification covers one type of paper, coated on both sides with polyethylene film, of the width specified herein.
HISTORICAL
1991-10-01
Standard
AMS3898/5A
This specification covers one type of paper, coated on both sides with polyethylene film, of the width specified herein.
HISTORICAL
1980-04-15
Standard
AMS3899
This specification and its supplementary detail specifications cover graphite fibers in the form of tape and sheet impregnated with heat-activated, formable, thermoplastic polysulfone resin.
HISTORICAL
1974-03-01
Standard
AMS3912
This specification covers the material and process requirements for fabricating sandwich radomes having polyimide-resin-impregnated quartz cloth shells and polyimide-resin syntactic foam cores.
CURRENT
1985-07-01
Standard
AMS3912A
This specification covers the material and process requirements for fabricating sandwich radomes having polyimide-resin-impregnated quartz cloth shells and polyimide-resin syntactic foam cores.
HISTORICAL
1991-10-01
Standard
AMS3572A
This specification covers polyurethane systems consisting of an isocyanate component and other components containing a polyol and other ingredients which, when mixed and cured, produce thermosetting, rigid, cellular products.
HISTORICAL
1978-07-01
Standard
AMS3572
This specification covers polyurethane systems consisting of an isocyanate component and other components containing a polyol and other ingredients which, when mixed and cured, produce thermosetting, rigid, cellular products.
HISTORICAL
1992-10-01
Standard
AMS3572B
HISTORICAL
1978-10-01
Standard
AMS3579A
This specification covers a non-crosslinked polyvinyl chloride plastic in the form of flexible, thin-wall, heat-strinkable tubing with a low recovery temperature. These products have been used typically as a flexible, electrical insulation tubing whose diameter can be reduced to a predetermined size by heating to 150 degrees C (302 degrees F) or higher, but usage is not limited to such applications. This tubing is stable for continuous exposure from -20 to +105 degrees C (-4 to 221 degrees F).
HISTORICAL
1979-05-01
Standard
AMS3579
This specification covers a non-crosslinked polyvinyl chloride plastic in the form of flexible, thin-wall, heat-strinkable tubing with a low recovery temperature. These products have been used typically as a flexible, electrical insulation tubing whose diameter can be reduced to a predetermined size by heating to 150 degrees C (302 degrees F) or higher, but usage is not limited to such applications. This tubing is stable for continuous exposure from -20 to +105 degrees C (-4 to 221 degrees F).
HISTORICAL
1994-06-01
Standard
AMS3573A
This specification covers a plasticized, polyether-type, urethane (EU) resin and hardener which, when mixed and cured, produces elastomeric polyurethane products.
HISTORICAL
2011-08-25
Standard
AMS3573
This specification covers a plasticized, polyether-type, urethane (EU) resin and hardener which, when mixed and cured, produces elastomeric polyurethane products. This resin has been used typically for applications, such as electronic encapsulation or for casting parts and shapes, requiring exceptional flexibility down to -55 degrees C (-67 degrees F) where poor reversion resistance can be tolerated, but usage is not limited to such applications.
Viewing 1 to 30 of 1096

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