Determination of Young’s Moduli of the Phases of Composite Materials Reinforced with Longitudinal Fibers, by Global Measurements

Renata Ildikó Szavá,Sorin Vlase,Arina Modrea,Ioan Szavá

doi:10.3390/sym12101607

Renata Ildikó Szavá, Sorin Vlase + Show 2 more

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https://doi.org/10.3390/sym12101607

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Abstract

The properties of a composite material are determined by the properties of the constitutive materials. In engineering practice, there are many situations in which we have composite material, but we do not have information about the properties of each phase component. The measurements we can make in such cases are on the existing material, thus being able to determine, experimentally, the global physical properties of the composite. The possibility of realizing an estimate of the mechanical properties of each component poses a problem if we start from these measurements. The paper proposes a method to achieve this, starting from the theoretical estimates established in the literature, then illustrated by an example to determine the properties of wood. Wood is a transverse isotropic material and therefore the constitutive law has symmetries that are manifested in the decrease of the number of parameters that define the stress-strain liason, defined only by five independent parameters. The proposed method can be extended to a diversity of models and materials used in the study of composite materials.

Highlights

Composite materials are made up of two or more phases, to obtain a new material with better properties, at a lower price
We know the engineering constants of the materials that are put together, we know the proportion in which they appear in the composite, and we want to determine the properties of the resulting composite material
In the case of measurements made on composites, they take place on the composite materials we work with

Summary

Introduction

Composite materials are made up of two or more phases, to obtain a new material with better properties, at a lower price. The properties obtained are determined by the concentration of the components, the arrangement mode, the geometry, the shape, the layout, etc. A multitude of composite materials can be obtained, and their properties can vary in an extensive range. We know the engineering constants of the materials that are put together, we know the proportion in which they appear in the composite, and we want to determine the properties of the resulting composite material. To obtain the engineering constant values of the resulting material, different methods have been applied in the literature Sometimes very precise values of the properties of the resulting material were obtained. The literature dealing with these issues is very rich and was developed in the sixth, seventh, and eighth decades of the 20th century

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