TY - JOUR N2 - This paper presents an estimation of performances by tests on composite material structures. In order to evaluate the effects on the structural behavior, tests changing the percentage of orientation of the fiber at 0, 45 and 90 degrees and mixing the unidirectional plies with the fabric ones have been done. Fixed the lay-up configuration and so the stacking sequence, two typology of structures have been analyzed; the first one having only unidirectional plies while the second one having a fabric ply (plain weave 0/90) in place of the top and bottom unidirectional plies. The openhole compressive strength and the filled-hole tensile strength and moduli have been characterized by test. A total of 72 specimens have been used in the test campaign. In order to well compare the test results a Performance Weight Index (PWI) has been introduced by authors in order to normalize the strength of each laminate with respect to its weight/unit of surface. Results and different laminate behaviors have been evaluated and discussed. L1 - http://journals.pan.pl/Content/85077/PDF/08_paper.pdf L2 - http://journals.pan.pl/Content/85077 PY - 2015 IS - No 4 EP - 564 DO - 10.1515/meceng-2015-0031 KW - composite materials KW - plain weave fabric KW - strenght KW - Performance Weight Index A1 - di Leo, Romeo A1 - De Fenza, Angelo A1 - Barile, Marco A1 - Gambino, B. A1 - Russo, S. PB - Polish Academy of Sciences, Committee on Machine Building VL - vol. 62 DA - 30.12.2015 T1 - Performances' estimation by tests of composite material structures with respect to the lay-up configuration and mixing the position of tape and fabric laminae SP - 553 UR - http://journals.pan.pl/dlibra/publication/edition/85077 T2 - Archive of Mechanical Engineering ER -