Interfacial Micromechanics in Fibrous Composites: Design, Evaluation, and Models

Abstract

Recent advances of interfacial micromechanics in fiber reinforced composites using micro-Raman spectroscopy are given. The faced mechanical problems for interface design in fibrous composites are elaborated from three optimization ways: material, interface, and computation. Some reasons are depicted that the interfacial evaluation methods are difficult to guarantee the integrity, repeatability, and consistency. Micro-Raman study on the fiber interface failure behavior and the main interface mechanical problems in fibrous composites are summarized, including interfacial stress transfer, strength criterion of interface debonding and failure, fiber bridging, frictional slip, slip transition, and friction reloading. The theoretical models of above interface mechanical problems are given.

Micromechanics for Polymer Matrix Laminated Composites: A Literature Review of Fundamental Models, Advances and a Trend Analysis for Future Researches

“…A study which presents micromechanical modeling for the fiber-matrix interface is developed by Lei et al [25]. As described by these researchers, the phenomenon of interfacial stress transfer is a relevant mechanical problem presented by fiber-reinforced composites.…”

“…This behavior involves four successive stages, these are: when the interface is still intact and unites fiber and matrix, the process of detachment and separation between the two phases, the interface with fibers and matrix completely separated and the removal of fibers from within the matrix by tension loading (pull out). A model for the transfer of elastic stress can be developed through the balance of forces on the fiber and expressed as follows [25]:…”

The Thermal Conductivities of Periodic Fibrous Composites as Defined by a Mathematical Model

“…Furthermore, in [16], a micro-scale simulation and prediction of the mechanical properties of fibrous composites by means of the bridging micromechanics model was carried out, whereas for a thorough study on the effective properties of fibrous composite media of a periodic structure, one may refer to [17].…”

Mechanics of fiber composites

“…This section is mainly based on the study presented by Lei et al [31]. Material's microstructure has an essential role in mechanical behavior of fiber-reinforced composites.…”