Theoretical and experimental study of the effect of fiber heads on the mechanical properties of non-continuous basalt fiber reinforced composites

Abstract

Abstract. The effect of basalt fibers, produced by the Junkers technology and used as reinforcement in polymer composites, was modeled on the properties of composites, adapting the statistical fiber mat model of Poisson type. The random distribution was approximated by so-called effective spheres that act as defect sites in composites, reducing their strength. The role of fiber heads in strength reduction and the corresponding failure modes were analyzed theoretically using a model and by experiments performed on specimens containing a single fiber head located at different distances from the crack initiation. The applicability of the model was proven both experimentally and by finite element analysis. Based on all these investigations, the effective cross section reduction, and hence the strength reduction (predicted by the model) caused by the presence of fiber heads was proven.

Properties of basalt-fiber reinforced foam glass

“…Figure 6 shows the thermal conductivity relative to the basalt-fiber addition amount. This verified that thermal conductivity increases with greater addition of basalt-fiber because the thermal conductivity of basalt-fiber, 0.8 W/m•K [13], is comparatively higher than that of foam glass, 0.115 W/m•K [14]. Thus, an increase in basalt-fiber addition results in an increase in thermal conductivity.…”

FE simulation of the indentation deformation of SiC modified vinylester composites in respect to their abrasive wear performance

“…Further on it is necessary to note that the shape of the reinforcement particles is also extremely important in the view point of the material strength, which is influencing also the wear performance [19]. Finally we think that the following observations could refer to a connection between the universal hardness and measured COF values.…”

Modelling of the Structure and the Required Level of Performance Properties of a Polytetrafluoroethylenecomposites for Sealing

“…This allows the material to be reduced in design without losing the required strength and stiffness characteristics. Promising in this regard are polymer composite materials (PCM) based on polytetrafluoroethylene (PTFE) due to its unique operational properties -the lowest coefficient of friction among polymers, high chemical inertia, thermal and cold resistance [1,2]. In the process of designing structures on the basis of fibrous composites, a preliminary calculation of deformation, strength and other structural characteristics is made.…”

“…The specified nature of deformation requires the development of conceptually new ways of its consideration [3][4][5][6][7]. There is a need for the development of methods for solving such problems in three-dimensional formulation, in particular the finite element method [2][3][4]8,9].…”