"yarn direction" is a correct and usable phrase in written English.
You might use it when discussing the direction of a yarn when crocheting or knitting, or when talking about other types of textile-making. For example, "I'm having trouble understanding the direction of the yarn in this pattern."
3D textile composites are assumed as a combination of several uni-directional layers, each of which represents continuous distribution of fibers in the yarn direction.
An additional failure mode intrinsic to the textile architecture was encountered for loading in the heavily undulated braid yarn direction.
Three braid architectures, comprising braiding angles of 30°, 45° and 60° were each loaded parallel to their axial, transverse and braid yarn direction.
In order to overcome the stability within the mutually orthogonal yarn direction of z-pinned composite material, a woven z-pinned composite was developed.
The woven substrate was cut into strips in the weft (PVDF-bicomponent yarn) direction.
A hypoelastic non-linear orthotropic material model was characterized for two different PVC-coated polyesters from uniaxial tests in the warp, fill, and 45° bias yarn directions.
For instance, cracks and damage propagate along fibre-yarn directions when braided composites are subject to impact.
Temperature and fiber yarn arrangement direction play a critical role in alternating the damage propagation and failure mechanisms.
The temperature distributions and heat flux transferring pathways are mainly along the yarns' orientation directions.
Both fracture behaviour and K1c were found to be strongly dependent upon the linear density of the weft yarn and the direction of crack propagation with respect to the orientation of the textile, however, the influence of weave type was not significant.
Using rotation matrices, the angle between yarns and longitudinal direction has been incorporated in general coordinates of the model.
