METHODOLOGY OF EXPERIMENTAL RESEARCH OF CONTINUOUS TIMBER ON COMPRESSION ALONG THE FIBERS UNDER THE INFLUENCE OF AN AGGRESSIVE ENVIRONMENT

Abstract

A detailed analysis of literature sources for the work of solid wood of deciduous and coniferous species under different types of load under the influence of aggressive environment. It was found that the studies, as a rule, concerned the strength of the soft load regime. In fact, no studies have been performed under the rigid test regime and no deformability parameters have been studied under such conditions. The technique of experimental researches of continuous wood of deciduous and coniferous breeds on compression along fibers at short-term loading under the influence of the aggressive environment at a rigid mode of tests is offered. The scope of experimental research is given. Birch and pine wood will be tested. Impregnating substances are selected, in particular, hydrochloric, acetic, lactic acid and sea water. The impregnation period is 7, 30 and 90 days, respectively. The total number of tested samples in the future will be 81 pieces. To solve these problems, a series of samples of 1 grade of solid wood of structural sizes of different species in the form of prisms with a cross section of 30x30x120 mm was made. These sizes of prisms allow to consider micro- and macrostructure of wood and provide absence of influence of friction between a plate of a press and an end face of a sample. Loading of samples will be carried out and controlled by means of the personal computer and the corresponding software. When testing prisms, the speed of movement of the press plate, the level of load application and the time spent on it will be recorded. Before the test, the samples will be centered on the geometric axes on the plate of the test machine. Based on the results of experimental research, complete diagrams of wood deformation under the influence of an aggressive environment for compression along the fibers under short-term loading will be constructed and the main strength and deformability parameters will be determined.