Reibverhalten von trockenen Faserstrukturen aus einem direkten Faserablageprozess

Abstract

Reibverhalten von trockenen Faserstrukturen aus einem direkten Faserablageprozess

Impact of winding parameters on the fiber bandwidth in the cylindrical area of a hydrogen pressure vessel for generating a digital twin

“…The measured trend of higher fiber spreading on helical plies is consistent with the literature, which predicts larger coefficients of friction and thus lower spreading due to the higher interlock when the incoming fiber orientation is parallel to the substrate. [24] The degree of spread at F = 16 N is on average higher than that for F = 4 N, with standard deviations increasing with increasing doctor blade gap. While studies on guiding rollers in literature have tended to find an increase in fiber splay with a reduction in fiber band tension, [6,20,22] an opposite trend is seen for fiber band tension with respect to winding on a winding core.…”

“…With parallel fiber orientation, the contact area as well as the possibility for interlocking is large compared to orthogonal (or angled) deposition, which results in a significantly larger coefficient of friction. [24]…”

“…Assuming higher frictional forces due to interlocking in an almost fiber-parallel course between the incoming fiber band and the substrate, a smaller fiber bandwidth was expected on circumferential layers than on helical layers. [24] One reason for the deviating measurement result may be a higher resin content on a winding substrate from circumferential layers than from helical layers, since more resin is pressed to the surface on circumferential layers than on helical layers due to the higher normal force component. However, the difference in fiber bandwidth is significant even at low resin loadings, leading to the suspicion of other influencing factors.…”

“…Experimental studies of the coefficient of friction in the winding process show that surface condition, winding type (wet or dry winding), resin viscosity (in wet winding) and fiber bandwidth have a significant influence on the coefficient of friction. [23][24][25] In contrast, influences due to fiber band tension, winding speed and fiber material are found to be negligible. [9,[23][24][25] For the winding process, the fiber orientation of the surface layer on which a fiber band is placed shows a particular importance in relation to the winding angle.…”

“…[23][24][25] In contrast, influences due to fiber band tension, winding speed and fiber material are found to be negligible. [9,[23][24][25] For the winding process, the fiber orientation of the surface layer on which a fiber band is placed shows a particular importance in relation to the winding angle. With parallel fiber orientation, the contact area as well as the possibility for interlocking is large compared to orthogonal (or angled) deposition, which results in a significantly larger coefficient of friction.…”