In this work, we demonstrate that current fatigue characterization tests with high density foam suffer from edge effects within the specimen, probably leading to early failures. Then a new specimen is designed to avoid this artifact. With this developed geometry, the stress is concentrated in the center of the specimen and not in the edge as given by the ASTM D1623-78 standard one. This allows getting the optimal fatigue life of PVC 4e-5 ℃-1 foam during tensile–tensile fatigue test.
ZenkertDBurmanM. Tension, compression and shear fatigue of a closed cell polymer foam. Compos Sci Technol2009; 69: 785–792.
4.
Gerard R, Fajoui J, Jacquemin F, et al. Fatigue loading of sandwich structures under slamming. In: Proceeding of Journées Nationales sur les Composites, JNC18, Nantes, France, 2013, pp. 82–91.
5.
GerardR. Fatigue des structures sandwich soumises au slamming—Développement de nouveaux essais2013. PhD Thesis, Université de Nantes, Saint Nazaire, France, 2013.
6.
Al-KudairiOHadaviniaHWaggottA. Characterising mode I/mode II fatigue delamination growth in unidirectional fibre reinforced polymer laminates. Mater Design2014; 66: 93–102.
7.
BrunbauerJPinterG. Fatigue life prediction of carbon fibre reinforced laminates by using cycle-dependent classical laminate theory. Compos—Part B2015; 70: 167–174.
8.
LianWYaoW. Fatigue life prediction of composite laminates by FEA simulation method. Int J Fatigue2010; 32: 123–133.
9.
SharmaNGibsonRAyorindeE. Fatigue of foam and honeycomb core composite sandwich structures: a tutorial. J Sandwich Struct Mater2006; 8: 263–319.
10.
GibsonLJAshbyMF. Cellular solids—structure and properties, 2nd ed. Cambridge, UK: Cambridge University Press, 1997.
KannyKMahfuzH. Flexural fatigue characteristics of sandwich structures at different loading frequencies. Compos Struct2005; 67: 403–410.
13.
Gerard R, Fajoui J, Alila F, et al. Updated fatigue test methods for structural foams and sandwich beams. In: 5th High performance Yacht design conference, Auckland, New Zealand, 2015.
14.
Allen T, Battley M and Stenius I. Experimental methods for determining shear loads in sandwich structures subjected to slam loading. In: 9th International conference on sandwich structures, ICSS9, Caltech, Pasadena, USA, 2010.
15.
Battley M and Allen T. Slamming induced failures of polymeric foam cores. In: 5th High performance Yacht design conference, Auckland, New Zealand, 2015.
16.
MorelFMorelANadotY. Comparison between defects and micro-notches in multiaxial fatigue—the size effect and the gradient effect. Int J Fatigue2009; 31: 263–275.
17.
ASTM D1623-78. Tensile and tensile adhesion properties of rigid cellular plastics. Annual book of the ASTM Standards, American Society for Testing and Materials, Philadelphia, PA.
