25/09/2017

The Art of Flexure mechanism Design

Sans-titre2-295x300.jpgFlexure mechanism design is an art, and this article provides the theoretical and practical foundation for scientists and engineers to express their creativity in this field. Flexure mechanisms, also known as compliant mechanisms, rely on the elasticity of matter to provide motion to mechanism linkages. Flexure mechanisms eliminate the disadvantages of classical joints: friction, wear, lubrication and play, while permitting monolithic design. Flexure-based mechanisms have gained prominence in a wide variety of fields including robotics, surgical instrumentation, aerospace, astronomy, particle accelerators, metrology and horology.

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05/03/2014

Design for Innovative Technology: From disruption to acceptance

Many gadgets are marketed as being “design,” which is meant to convince the customer more than anything else. This does not make the job any easier for designers, who consider their contributions to be at the heart of the innovation process and social change. Without attempting to compete with leading design historians and thinkers, it nonetheless seems necessary to begin with a look at this discipline, its role and its context, before diving into the adventure of disruptive innovation.

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12/02/2014

Les ruptures fertiles: Design et innovation disruptive

Trop de gadgets maladroitement stylisés semblent aujourd’hui encore se targuer de l’expression « C’est design ! ». Cela ne facilite pas le travail des designers qui considèrent leur contribution au coeur du processus d’innovation et de l’évolution sociale. Sans concurrencer les grands historiens et penseurs du design, il paraît nécessaire de commencer cet ouvrage par un regard sur cette discipline, son rôle et son contexte, avant de plonger dans l’aventure de l’innovation disruptive, cette forme d’innovation en rupture avec l’existant, résolument liée à l’émergence de nouvelles technologies.

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14/11/2013

History of Bridge Construction

The first bridges with a structure of load-bearing iron elements were suspension bridges. The idea of a suspended bridge is extremely old; the first known footbridge, using suspension chains, was constructed in China around 65 A.D. However, until the end of the 18th century, very few bridges were constructed from metal. The weight of the chains limited spans to around 20 m, and only the invention of chains made of articulated iron bars, known as eye bars and patented in England in 1817, allowed spans to substantially increase. The first important suspension bridge by the Englishman, Telford, was constructed over the Menai Straits in 1826 and is noteworthy for achieving a record span of 176 m. This bridge is still in service, the original iron chains having been replaced by articulated steel bars in 1938.

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27/01/2012

Dessins d’architecture

8352537-fragment-of-an-interior-of-the-ancient-building-pictured-by-the-photographer-ink-and-watercolour.jpgLes Archives de la construction moderne (Acm) conservent depuis 2003 un fonds exceptionnel de dessins que le Genevois Frédéric de Morsier (1861-1931) a réalisés au cours de ses études d’architecture à l’Ecole nationale supérieure des Beaux-Arts (ENSBA) de Paris entre 1882 et 1890. Ces documents ont été collationnés par la famille de Morsier auprès de plusieurs de ses membres pour être ensuite confiés aux Acm qui en ont établi le catalogue sous la direction de Martine Jaquet. Ils permettent de suivre l’itinéraire académique d’un étudiant de la fin du XIXe siècle dans ce qui passait alors pour la plus importante école d’architecture au monde.

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