title: In situ synchrotron wide-angle X-ray diffraction investigation of fatigue cracks in natural rubber.
abstract: Natural rubber exhibits remarkable mechanical fatigue properties usually attributed to strain-induced crystallization. To investigate this phenomenon, an original experimental set-up that couples synchrotron radiation with a homemade fatigue machine has been developed. Diffraction-pattern recording is synchronized with cyclic loading in order to obtain spatial distributions of crystallinity in the sample at prescribed times of the mechanical cycles. Then, real-time measurement of crystallinity is permitted during uninterrupted fatigue experiments. First results demonstrate the relevance of the method: the set-up is successfully used to measure the crystallinity distribution around a fatigue crack tip in a carbon black filled natural rubber for different loading conditions.
authors.affiliation: LUNAM Université, Ecole Centrale de Nantes, GeM, UMR CNRS 6183, BP 92101, 44321 Nantes Cedex 3, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Rublon
authors.forename: Bertrand
authors.initials: B
authors.lastname: Huneau
authors.forename: Nicolas
authors.initials: N
authors.lastname: Saintier
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Beurrot
authors.forename: Adrien
authors.initials: A
authors.lastname: Leygue
authors.forename: Erwan
authors.initials: E
authors.lastname: Verron
authors.forename: Cristian
authors.initials: C
authors.lastname: Mocuta
authors.forename: Dominique
authors.initials: D
authors.lastname: Thiaudière
authors.forename: Daniel
authors.initials: D
authors.lastname: Berghezan