Load transmission in layered materials

Load transmission in reinforced plastic heterogeneous media is investigated on the basis of the equations of the theory proposed in [1–3]. The stress distribution problem is solved for a layered half-space with loads applied to one of the "hard" layers in the plane of that layer. Simplified stress formulas are presented. The corresponding error is estimated by working a numerical example. The results are compared with the corresponding problem of the theory of elasticity for a homogeneous orthotropic body.Mekhanika Polimerov, Vol. 4, No. 2, pp. 322–327, 1968     

On the splitting of groups of central group extensions

It is proved that if G and V are abelian groups, then the group Ext(G, V) of all abelian extensions of the group V with the aid of the group G is extracted by the direct component in the group Opext(G, V) of all central extensions of V with the aid of G.Translated from Matematicheskie Zametki, Vol. 6, No. 2, pp. 197–200, August, 1969.     

A study of the chemical properties of 3-aryl-2-methylquinazol-4-one derivatives with the object of finding methods for their analysis

In order to find methods for the analysis of 3-aryl-2-methylquinazol-4-ones, we have studied the condensation of 2-methyl-3-(o-tolyl)-quinazol-4-one with aromatic aldehydes. It has been shown that the condensation of these substances takes place readily in glacial acetic acid and that the styryl synthesized separates out directly in the form of a crystalline quinazolonium perchlorate, the depth of coloration of which depends on the chemical nature of the aldehyde residue.