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Determination of the linear correlation coefficient between Young’s modulus and the compressive strength in fibre-reinforced concrete based on experimental studies

Czajkowska Agnieszka, Raczkiewicz Wioletta, Ingaldi Manuela

Production Engineering Archives

2023

Vol. 29, Iss. 3

298-297

The test procedures for determining Young's modulus in concrete are complicated and time-consuming. Therefore, attempts to search for alternative methods of its determination are not surprising. The relationship between the value of compressive strength and Young's modulus in concrete is known. However, the strength of this relationship in fibre-reinforced concrete has not been exactly described. The article attempts to investigate the strength of the correlation between Young’s modulus and the compressive strength of fibre-reinforced concrete. The influence of the amount of fibres on this relationship was also checked. Two types of specimen were used for the tests. The specimens differed in the content of steel fibres, 0.25% and 0.50%, respectively. In order to determine the correlation relationship, the method of linear regression and the coefficient of linear correlation were used. The use of the determination coefficient allowed us to examine the degree of explanation of one variable by another.

Application of finite element method for analysis of nanostructures

Bocko J., Lengvarský P.

Acta Mechanica et Automatica

2017

Vol. 11, no. 2

116--120

The paper deals with application of the finite element method in modelling and simulation of nanostructures. The finite element model is based on beam elements with stiffness properties gained from the quantum mechanics and nonlinear spring elements with forcedisplacement relation are gained from Morse potential. Several basic mechanical properties of structures are computed by homogenization of nanostructure, e.g. Young's modulus, Poisson's ratio. The problems connecting with geometrical parameters of nanostructures are considered and their influences to resulting homogenized quantities are mentioned.