Title

Effect of Geometry, Loading and Elastic Moduli on Critical Parameters in a Nanoindentation Test in Polymeric Matrix Composites with a Nonhomogeneous Interphase

Document Type

Article

Publication Date

2011

Keywords

design of experiments, finite element analysis (fea), interface/interphase, mechanical properties, nonhomogeneous interphase, statistical properties/methods

Digital Object Identifier (DOI)

https://doi.org/10.1163/092764411X570860

Abstract

Fiber nanoindentation models are developed for polymeric matrix composites with nonhomogeneous interphases. Using design of experiments, the effects of geometry, loading and material parameters on the critical parameters of the indentation test such as the load-displacement curve, the maximum interfacial shear and normal stresses are studied. The sensitivity analysis shows that the initial load-displacement curve is dependent only on the indenter type, and not on parameters such as fiber volume fraction, interphase type, thickness of interphase, and boundary conditions. The interfacial tensile radial stresses are not sensitive to indenter type, or to type and thickness of interphase, while the interfacial compressive radial stresses are sensitive mainly to boundary conditions and thickness of interphase; however, the influence of these factors on the interfacial radial stresses can be large. In contrast, the interfacial shear stress is sensitive to all factors, but the influence of the factors is relatively small.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Composite Interfaces, v. 18, issue 3, p. 275-294

Share

COinS