@ARTICLE{Stampouloglou_Ioannis_H._The_2002, author={Stampouloglou, Ioannis H. and Theotokoglou, Efstathios E.}, volume={vol. 49}, number={No 4}, journal={Archive of Mechanical Engineering}, pages={297-315}, howpublished={online}, year={2002}, publisher={Polish Academy of Sciences, Committee on Machine Building}, abstract={In the present study a new energy theorem is proposed, "The two actionstheorem", which is valid in linear elastostatic problems. A new formalism concerning the works done by the external actions is introduced. Known energy theorems are proved using the proposed two-actions theorem. A composite materials problem is confronted in terms of the two actions theorem and energy relations are formulated. Finally, it is presented a study on the problems of a composed two material hollow cylinder under internal and external pressure, and of stretching of an infinite plate with an inserted elastic disc of a different material. The proposed energy relations are verified in these applications.}, type={Article}, title={The two-actions theorem and its application to composite materials}, URL={http://journals.pan.pl/Content/125180/PDF-MASTER/3_MECHANICAL_49_2002_4_Stampouloglou_The_two.pdf}, keywords={linear, elastostatic, energy theorems, work, external action, composite materials}, }