Saad Nauman
description
Transcript of Saad Nauman
Saad Nauman
University of Lille, France ENSAIT, France Topic
WEAVING OF 3D WARP INTERLOCK REINFORCEMENT ON
CONVENTIONAL LOOM
WEAVING OF 3D WARP INTERLOCK
REINFORCEMENT ON CONVENTIONAL LOOM
Saad NAUMANUniv. Lille North of France, F-59000, Lille, France
ENSAIT, GEMTEX, F-59100 Roubaix, France
PLAN Introduction Classification of interlock fabrics Weaving of a 3D interlock reinforcement Observations made on photomicrographs Geometrical Modeling
INTRODUCTION
Continuum Models Mesostructur
al Models
Numerical Models
Alternative Approaches
Why Geometrical approach against Numerical approach?
Traditional approach of geometrical modeling
Why introduce new approach?
GEOMETRICAL APPROACH AGAINST NUMERICAL APPROACH
HIERARCHY Continuous filaments (micro) Multifilament tows (meso) 3D Interlock fabrics (macro)
CLASSIFICATION OF 3D INTERLOCK FABRICSAccording to the orientation of binding tow Angle Interlock Orthogonal Interlock
According to binding depth of tow Through the thickness interlock Layer to layer interlock
CLASSIFICATION OF 3D INTERLOCK FABRICS
(a) Angle interlock/Through-the-thickness binding
(c) Angle interlock/Layer-to-layer binding
(b) Orthogonal interlock/Through-the-
thickness binding
(d) Orthogonal interlock/Layer-to-layer
binding
WEAVING OF A MULTILAYER INTERLOCK Calculation of reed denting order
R.C. = 10/2.5*W = 4 / W Criteria of reed selection:
a. To avoid friction and to facilitate weavingb. To suit the conceived geometry
Order of warp and weft tows
CONCEPTION OF 13 LAYER INTERLOCK REINFORCEMENT
Diagonal redistribution of warp tows inside the reed
dent and in the fabric
Vertical blocks of warp tows inside the reed
dent and in the fabric
NUMBERING ORDER OF WARP TOWS
GEOMETRY OF INTERLOCK REINFORCEMENT In order to study :
Reed denting order Numbering order of warp tows
OBSERVATIONS MADE ON PHOTOMICROGRAPHS
ELEMENTS OF FABRIC GEOMETRY
Cross section
Trajectory
THEORY OF BLOCKS
Blocks of tows
Interblock crimp
Interblock displacemen
t
BLOCKS OF WARP TOWS INSIDE A REED DENT
A
Interblock displacement (warp) = A = mm/dent
CONTINUUM OF GEOMETRY
Cmax(weft)Cmax(warp)
Cmax(warp) Cmax(weft)
C(warp) > 0
C(weft) > 0
C(weft) = 0 C(warp) = 0
EVOLUTION OF TOW CROSS SECTION WITH TRAJECTORY
Cmax(warp) Cmax(weft)
WEFT
WARP
CONCLUSION Modeling of two extreme geometries i.e.,
Cmax(warp) and Cmax(weft)
Modeling of cross sectional evolution of warp and weft tows
Identification of an architecture on the continuum between Cmax(warp) and Cmax(weft)
Thanks
Questions
POWER ELLIPTICAL CROSS SECTION