Causes of the fluctuation of the strength of a block of polycaproamide exposed to the action of heat

Fractography and mechanical testing are employed to investigate the fracture mechanism of polyamide blocks exposed to the action of heat. The mode of fracture depends essentially on the dangerousness of the surface defects.Kaunas Polytechnic Institute; Institute of Physicotechnical Problems of Power Engineering, Academy of Sciences of the Lithunian SSR, Kaunas. Translated from Mekhanika Polimerov, No. 4, pp. 642–645, July–August, 1969.