Elastic Behavior of Woven Fabric Composites: I—Lamina Analysis

Abstract

Two-dimensional models are presented for the elastic analysis of a plain weave fabric lamina. These models take into account the actual fabric structure by consid ering the fiber undulation and continuity along both the warp and weft directions, possible presence of gap between adjacent yarns, actual cross-sectional geometry of the yarn and possible unbalanced nature of the plain weave fabric. Typical studies on the effect of fiber undulation and lamina thickness on the in-plane elastic constants are presented. A large discrepancy, similar to that reported in literature, is found between the predicted elastic moduli of plain weave fabric lamina by ID WF models and experimental results. On the other hand, the predictions of 2D WF models are fairly good since the two-dimensional extent of the fabric is considered in these models.

Modelling of Damage Evolution in Braided Composites: Recent Developments

“…In analytical schemes, elastic constants of textile composites were estimated from homogenised equivalents of the representative unit cell (RUC) structure using the rule of mixtures. The predicted levels of strengths were generally higher than those in experimental observations; these higher values were attributed to limitations of linear elastic assumptions in the analytical expressions (Naik and Shembekar 1992;Quek et al 2003). On the other hand, experimental studies were regarded as expensive and time-consuming.…”

Micromechanical modeling of 8-harness satin weave glass fiber-reinforced composites

“…For example, Naik & Shembekar [11], Naik & Ganesh [12], Vandeurzen, Ivens, & Verpoest [13], [14], Dimitrienko [15], Bystrom, Jekabsons, & Varna [16], Adumitroaie & Barbero [17]- [18] and Turner [19]. These models represented the woven geometry using two layers of yarns with homogenized properties for each layer considering the effects of yarn undulation.…”

Mechanically coupled laminates with balanced plain weave

“…1, can be characterized as a high crimp fabric, where the crimp angle is typically of the order of 45. Micro-mechanical modelling [13][14][15] has helped in understanding the mechanisms leading to observed reductions in elastic properties and mechanical performance in such high crimp fabrics, compared to non-crimp fabric or unidirectional laminated material (see Table 1). …”