Finite Element Modeling of an Oriented Assembly of Continuous Fibers

Abstract

A micromechanical model of the large displacement behavior of a sliver of oriented helical fibers has produced algorithms for predicting and updating all five independent mechanical constants. The incorporation of the micromechanics in a finite-element model of a uniform rope of initially untwisted fibrous material is described. The response of the whole model to combined external and torsional stresses such as occur during twist insertion is then described. A detailed analysis of the stresses and strains in the deformed model shows that fiber packing in the yarn is predicted to quickly become non-uniform. The inner regions become most densely packed, and fibers there are subject to the highest stress levels. Fibers further from the center largely avoid being stressed by moving toward the yarn axis.

Present State of the Art of Composite Fabric Forming: Geometrical and Mechanical Approaches

“…The governing equilibrium nonlinear equations (6) are solved using dynamic explicit integration. This approach has proven to be, in particular, suitable to highly non-linear geometric and material problems and where a large amount of contact between different structural parts occurs [ 12 , 19 , 56 ]. The Dynamic Explicit DE algorithm available in Abaqus/Explicit for solving the algebraic system works by using the lumped form of the mass matrix [ 57 ].…”

Nanotechnology and Development of Strain Sensor for Damage Detection

“…However, very less research has been conducted to use the concept of coated yarn as a flexible piezo-resistive strain sensor for structural health monitoring without jeopardizing the mechanical behavior of core material especially numerically. Different researchers had worked on numerical models and had used finite element analysis (FEA) to predict the mechanical behavior of yarn [30][31][32]. With the advancement of computer-aided design (CAD) and computeraided engineering (CAE), it is possible to investigate the mechanical behavior of yarn using finite element modeling (FEM) [33].…”

A Combined Discrete Event—Agent Based Approach to Modeling Tensile Strength of One-Dimensional Fibrous Materials. Face Validation and Effect of the Basic Model Parameters

“…The complexity of the strength research problems is determined by the fact that mechanical properties, including tensile strength, are the result of random and non-linear interactions of a huge number of fibers in the structure of the fibrous material [5]- [11]. Traditional methods that study the mechanical properties of fibrous materials are based on analytical modeling [12]- [17] or on regression models and models of artificial intelligence which in their turn are based on experimental data [3] [18]- [20]. These models do not take into account the characteristics of individual fibers and interactions between individual fibers.…”