WEIGHT DESIGN OF COMPOSITE LAMINATES FOR MULTIPLE LOADS
A. Krikanov and S. R. Soni
new design method of constructing optimum weight composite laminates
for multiple loads is proposed in this paper. A netting analysis
approach is used to develop an optimization procedure. Three
ply orientations permit development of optimum laminate design
without using stress-strain relations. It is proved that stresses
in minimum weight laminate reach allowable values in each ply
with given load. The optimum ply thickness is defined at maximum
value among tensile and compressive loads. Two examples are
given to obtain optimum ply orientations, thicknesses and materials.
For comparison purposes, calculations of stresses are done in
orthotropic material using classical lamination theory. Based
upon these calculations, matrix degrades at 30 to 50% of ultimate
load. There is no fiber failure and therefore laminates withstand
all applied loads in both examples.