Experimental determination of elastic properties of the loose materials in the field of high pressures after heating

Abstract

Abstract This article presents a physical study of materials’ elastic response (asbestos, slag microspheres, fireclay and corundum powders) at the pressure up to 70 MPa. The research is carried out after heating the samples up to 500 °C and exposure to crimping pressure up to 105 MPa. The graphical dependencies are given for each materials of relative strain from the pressure level. The original research technique of elastic response for materials samples having a loose aggregate state is proposed in laboratory. This technique is based on the use of a special laboratory equipment relatively simple and efficient design which combines power and measurement components. A detailed description of the scheme and principle of operation equipment is given. The calibration of dynamometer component of the special equipment is carried out and graphs of its work are presented. A technique for calculating the elastic moduli of material samples is proposed. The elastic moduli and the relative residual deformation of the material samples are determined. The ability of materials to preserve their loose properties are studied (dismantling ability). The conclusion about the possibility of using materials in the housing of pressure vessels is made as a means of protecting their load-bearing structural elements from unwanted heating and reducing in their strength characteristics.