Papers by Keyword: Computational Method

Abstract: In this paper, the algorithm for strength analysis of diaphragms made of elastomers is described, and the strength analysis of the diaphragm made of polyurethane "Vitur" T-1413-85 is carried out. The results obtained showed that the description of the material behavior using the Moony-Rivlin model (5 parameters) gives the greatest accuracy. A comparison of the results of modeling the stress-strain state of the diaphragm and the experimental studies carried out to determine the displacements confirmed the adequacy of the chosen model (average correlation coefficient between numerical simulation and experiment R² = 0.98) for both studied diaphragm thicknesses. The conducted evaluation of the diaphragm resource according to the criteria of fatigue failure showed the correctness of the selected models of durability.

Abstract: Base on the existing condition that the bearing capacity is insufficient of some aging reinforced concrete (RC) members with axial tension, the formula for calculating the tensile capacity of the RC members strengthened with externally bonded carbon fiber reinforced plastic (CFRP) sheets is deduced and experiments of 8 RC members are conducted to examine the influences of CFRP sheets on the cracking load and ultimate load of the RC members. The calculation formulas agree with the experimental data and give the reference to the practical projects. The study is instructive and useful in strengthening of RC members with externally bonded CFRP sheets under axial tension.

Abstract: A new science method called Recursive Fitting Method (RFM) used to calculate the dust explosion rate of pressure rise was introduced. Residual Sum of Squares per Point (RSSR) was introduced to evaluate the fitting goodness of different conditions. Compared with existing methods, the results show that Recursive Fitting Method (RFM) has higher computational accuracy by drawn an experimental curve. And it has better computational repeatability compared with Tangent Method by repeating calculation of the same data. The new method can not only reduce the influence of signal noise but also calculate the correct rate of pressure rise accurately.