Èññëåäîâàíî âëèÿíèå íàïîëíèòåëÿ èç ïîëèóðåòàíîâîé ïåíû íà ïðî÷íîñòü è ýíåðãîïîãëîùåíèå ÿ÷åèñòûõ ìíîãîñëîéíûõ ïàíåëåé ïðè ñaeàòèè. Èñïûòàíèÿ íà ñaeàòèå ïîêàçûâàþò, ÷òî íåñóùàÿ ñïîñîáíîñòü ÿ÷åèñòûõ ìíîãîñëîéíûõ ïàíåëåé ñ íàïîëíèòåëåì èç ïîëèóðåòàíîâîé ïåíû âûøå, ÷åì òàêîâàÿ òàêèõ ïàíåëåé áåç íàïîëíèòåëÿ, ëèáî îáðàçöîâ, ñîñòîÿùèõ òîëüêî èç ïîëèóðåòàíîâîé ïåíû. Ýôôåêòèâíîñòü ýíåðãîïîãëîùåíèÿ îáðàçöîâ ñ áîëåå âûñîêîé îòíîñèòåëüíîé ïëîòíîñòüþ ÿ÷ååê (5,1 è 5,7%) îêàçàëàñü íèaeå, ÷åì îáðàçöîâ áåç íàïîëíèòåëÿ ïðè íèçêèõ óðîâíÿõ äåôîðìàöèè ñaeàòèÿ, îäíàêî ïî äîñòèaeåíèè ïîñëåäíåé óðîâíÿ 0,1 è âûøå èìååò ìåñòî ÿðêî âûðàaeåííûé îáðàòíûé ýôôåêò. Ïðè ýòîì ýíåðãîïîãëîùåíèå îáðàçöîâ ñ ìåíüøåé îòíîñèòåëüíîé ïëîòíîñòüþ ÿ÷ååê (4,43%) âûøå, ÷åì îáðàçöîâ áåç íàïîëíèòåëÿ. Êëþ÷åâûå ñëîâà: ìíîãîñëîéíàÿ ïàíåëü, ñåðäöåâèíà ðåøåòêè, ïîëèóðåòàíîâàÿ ïåíà, ìåõàíè÷åñêèå ñâîéñòâà, ýôôåêòèâíîñòü ïîãëîùåíèÿ ýíåðãèè. Introduction. Super-lightweight sandwich panel structures attract much attention of researchers due to their desirable efficiency and high level of building energy absorption [1-4]. These structures are widely used in aerospace and submarine industries. Sandwich structures have recently been developed with different combinations of surface and core plates, in order to improve their performance. These structures contain lightweight and robust surface plates [5] and dense cell cores made of metallic foams [6, 7] and honeycomb cores [8-12] from polymers such as Nomex [13-16], while networked trusses are made with light metals such as aluminum [17-20] and titanium alloys [21, 22]. The outstanding interest that exists for sandwich structure application with foam cores in industrial fields seems to be very topical. Foam cores can play the role of structural equipment, cooling machine or acoustic dissipater [23]. For this purpose, rigid and light materials are used to make sandwich structures. Sandwich panel structures made up of carbon fiber-reinforced polymer (CFRP) are significantly linked to the recent studies [24-28]. Various networks of such structures can be made using the hot press molding [24, 25] or snap fit methods [18, 27]; therefore, they are used to produce honeycomb structures [26]. Therefore, the primary aim of this study was to achieve a high compressive strength by changes in the honeycomb core designs. Another aim of the study was to apply the polyurethane foam injected into honeycomb cores, in order to raise the peak of compressive strength and to compare the performance of foam-filled cores with unfilled ones.
