The effect of matrix plasticity on the stress fields in a single filament composite and the value of interfacial shear strength obtained from the fragmentation test

Influence of matrix plasticity and residual thermal stress on interfacial debonding of a single fiber composite

“…The length of this plateau is enlarged as the applied strain increases. Similar results were reported in [Termonia 1987] for the elastic matrix model and in [Tripathi et al 1996] for the elastoplastic matrix model. The results are presented here for the purpose of completeness and comparison to the debonding interface model.…”

“…That is because the hydrostatic stress is not prominent in the loading cases in this study. The strain hardening curve for elastoplastic epoxy resin input into ABAQUS is shown in Figure 2; the data is from [Tripathi et al 1996]. The predicted stress/plastic strain curve is in good agreement with the experimental data.…”

“…For matrices with remarkable elastoplastic behavior, Tripathi et al [1996] introduced matrix plasticity to their FEM to illustrate the limitations of that assumption. Without considering fiber/matrix interfacial debonding, these authors found that the shear stress value near the fiber-end forms a plateau with value less than the maximum shear stress at the interface.…”

The effect of temperature on stress transfer between a broken fibre and the adjacent fibres in unidirectional fibre composites

“…4 results in interfacial shear yielding at a fibre-break [10,[25][26][27][28][29][30]. This develops a plastic region as the interfacial shear stress in the matrix exceeds the yield strength of the bulk epoxy resin.…”

Measurement and analysis of stress transfer and toughness at a fiber–matrix interface

“…The precise mode of failure is often a function of the environmental conditions and time, thus complicating the prediction of long-term behavior. A number of research groups have characterized the resistance to propagation of these defects by combining experimental observations of filament fracture in embedded single fiber microcomposites with either analytical solution or finite element analysis of the stress transfer and energy changes accompanying the fracture of an embedded filament [1][2][3][4][5][6][7][8][9] .…”