Investigation of Effective Mechanical Characteristics of Nanomodified Carbon-Epoxide Composite by Numerical and Analytical Methods

M.O. Kaptakov

doi:10.17762/turcomat.v12i5.1049

Abstract

In this work, the mechanical properties of composite samples prepared using a conventional and nanomodified matrix were studied. The thickness of the monolayers in the samples was 0,2 μm. It was found in experiments, that the addition of fullerene soot as a nanomodifierled to an increase in the mechanical properties of the samples along the direction of reinforcement. At the same time, an improvement in the quality of the contact of the matrix with the fibers in the samples with the nanomodifier was observed: on the fracture surface, the nanomodified matrix envelops the fibers, while the usual matrix completely exfoliates. The obtained effects of changing the strength of composites can be associated, among other things, with a change in the level of residual stresses arising in composites during nanomodification. Analytical and numerical modeling methods are used to explain these effects.

Highlights

The development of modern technology requires the creation of new structural materials with high elasticstrength characteristics, and, on their basis, structures with more effective weight data
The development of composite materials that improve their operational limits is based on the reinforcement of two or more fibers into a single polymer matrix, which leads to an improved material system called hybrid composites with a wide variety of material properties [22-25]
It was found in experiments that the addition of fullerene soot led to an increase in the mechanical properties of the samples along the direction of reinforcement

Summary

Introduction

The development of modern technology requires the creation of new structural materials with high elasticstrength characteristics, and, on their basis, structures with more effective weight data. The creation of polymer composites based on nano-modified binders has been one of the priority areas of research in the field of composite materials manufacturing technologies for many years[1-12]. Experimental studies of the mechanical properties of composites In the experiments, samples of composites obtained from carbon fibers and an epoxy binder and obtained from carbon fibers and a nano-modified epoxy binder containing 0.2 wt. Epoxy binder EDT-10 (Russia) and carbon fibers HTA-40 (TohoTenax Co. Ltd.) were used to prepare composite samples. It was found in experiments that the addition of fullerene soot led to an increase in the mechanical properties of the samples along the direction of reinforcement. The obtained effects of changing the strength of composites can be associated, among other things, with a change in the level of residual stresses that arise in composites during nanomodification

Modeling the elastic properties of nanocomposites

Findings

Conclusions