Conception et développement d'une machine d'essai de fatigue pour ressorts à lames
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Conception et développement d'une machine d'essai de fatigue pour ressorts à lames

Conception et développement d'une machine d'essai de fatigue pour ressorts à lames


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About the Book

La fatigue est une défaillance d'un matériau ou d'une machine due à l'action d'une contrainte répétée ou fluctuante sur un élément de machine pendant un certain nombre de temps. Cette défaillance commence par une petite fissure. La fissure initiale est si minuscule qu'elle ne peut être détectée à l'oeil nu et qu'elle est même difficile à localiser lors d'une inspection à la loupe ou aux rayons X. La fissure se développe à un point de discontinuité dans la structure de la pièce. La fissure se développe à un point de discontinuité dans le matériau, tel qu'un changement de section transversale, une rainure de clavette, un trou ou une encoche. Les points moins évidents où une rupture par fatigue est susceptible de se produire sont les marques d'inspection ou d'estampage, les fissures internes ou même les irrégularités causées par l'usinage. Une fois qu'une fissure est amorcée, l'effet de concentration des contraintes devient plus important et la fissure progresse plus rapidement. Un ressort est défini comme un corps élastique dont la fonction est de se déformer sous l'effet d'une charge et de reprendre sa forme initiale lorsque la charge est supprimée. Les ressorts à lames absorbent les vibrations du véhicule, les chocs et les charges de bosses (induites par les irrégularités de la route) par le biais de la déflexion du ressort, de sorte que l'énergie potentielle est stockée dans le ressort à lames, puis libérée lentement. C'est pourquoi, dans cette étude, le test de fatigue du ressort à lames est fabriqué à l'aide d'un mécanisme à manivelle.


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Product Details
  • ISBN-13: 9786208936952
  • Publisher: Editions Notre Savoir
  • Publisher Imprint: Editions Notre Savoir
  • Height: 229 mm
  • No of Pages: 56
  • Returnable: N
  • Weight: 141 gr
  • ISBN-10: 6208936950
  • Publisher Date: 17 Jun 2025
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Spine Width: 3 mm
  • Width: 152 mm


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