RAPID METHOD DETERMINATION THERMAL ACTIVATION PARAMETERS IN PREDICTING THE DURABILITY OF PRODUCTS MADE OF COMPOSITE MATERIALS BASED ON WOOD

M. G. Chausov , L. M. Boyko , I. G. Grabar
Abstract

Based on the concepts of fracture mechanics, the questions of determining the thermo-activation parameters of materials (TAP) based on wood were investigated. Using the example of the basic defining equation of Zhurkov, the possibility of creating an express method for determining TAPs is shown. Kinetic representation of the mechanism of destruction makes it possible to calculate the performance, predict the longevity of materials and structures with their application. And also develop new test methods, design new materials and products. The prediction of the longevity of materials for cabinet furniture consists in testing samples to which an increasing load is applied up to their destruction. The tests are carried out at four fixed temperatures and a constant rate of increase in load. At the same time, the time until the destruction of each sample is recorded. Moreover, the values of the thermo-activation parameters are determined on the basis of the results of the tests carried out by solving the proposed system of equations that closes the defining Zhurkov equation. Thus, the use of express methodology allows predicting the durability a laminated particle board under specific conditions of their operation. The result of the forecast can be used as an objective criterion of efficiency, both in the optimization of existing furniture products, and in the design of new ones. Examples of application of the method for specific composite materials based on wood are given. The complexity of the method is much less than the traditional methods for determining the thermo-activation parameters, while maintaining practically the same accuracy of their determination.

Keywords

kinetic theory of strength, methods of determining the activation energy, rapid method for determining the thermal activation parameters

Suggested citation
M. G. Chausov, L. M. Boyko, & I. G. Grabar (2016). RAPID METHOD DETERMINATION THERMAL ACTIVATION PARAMETERS IN PREDICTING THE DURABILITY OF PRODUCTS MADE OF COMPOSITE MATERIALS BASED ON WOOD. Ukrainian Journal of Forest and Wood Science, (255), 286-295.
References
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