UDC 624.048
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1 LLC "LIRA-SAPR", Kyiv, Ukraine.
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3 LLC "LIRA-SAPR", Kyiv, Ukraine.
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NUMERICAL METHODS TO FIND STIFFNESS PROPERTIES OF A BAR CROSS-SECTION
Abstract. The paper considers several aspects of determining stiffness properties of bar sections and simulating stress-strain state of bar section. The authors propose a method to find stresses based on nonlinear ‘stress-strain’ dependencies. Nonlinear analysis for the specified set of forces is carried out when stiffness properties of the section are determined numerically. This method is implemented in the LIRA-SAPR software package and makes it possible to determine tangential and secant stiffness properties in order to carry out nonlinear analysis. The methods proposed for computation of stiffness properties and simulation allow the user to specify the characteristics of nonlinear strain in materials more accurately.
Keywords: numerical methods, stiffness characteristics, computer simulation, stress-strain state, deformation modulus, nonlinear analysis.
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