کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
800287 | 1467175 | 2006 | 24 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Compressive failure of fiber composites under multi-axial loading Compressive failure of fiber composites under multi-axial loading](/preview/png/800287.png)
This paper examines the compressive strength of a fiber reinforced lamina under multi-axial stress states. An equilibrium analysis is carried out in which a kinked band of rotated fibers, described by two angles, is sandwiched between two regions in which the fibers are nominally straight. Proportional multi-axial stress states are examined. The analysis includes the possibility of bifurcation from the current equilibrium state. The compressive strength of the lamina is contingent upon either attaining a load maximum in the equilibrium response or satisfaction of a bifurcation condition, whichever occurs first. The results show that for uniaxial loading a non-zero kink band angle ββ produces the minimum limit load. For multi-axial loading, different proportional loading paths show regimes of bifurcation dominated and limit load dominated behavior. The present results are able to capture the beneficial effect of transverse compression in raising the composite compressive strength as observed in experiments.
Journal: Journal of the Mechanics and Physics of Solids - Volume 54, Issue 3, March 2006, Pages 611–634