Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties

Materials Research

José Ricardo Tarpani¹  Marcelo Tadeu Milan¹  Dirceu Spinelli¹  Waldek Wladimir Bose¹ 

[1] ,The University of São Paulo Engineering School of São Carlos Materials, Aeronautics and Automotive Engineering Department,Brazil

关键词: carbon-epoxy laminates;    composite materials;    mechanical properties;   

DOI  :  10.1590/S1516-14392006000200003

来源: SciELO

【 摘 要 】

In Part II of this work, quasi-static tensile properties of four aeronautical grade carbon-epoxy composite laminates, in both the as-received and pre-fatigued states, have been determined and compared. Quasi-static mechanical properties assessed were tensile strength and stiffness, tenacity (toughness) at the maximum load and for a 50% load drop-off. In general, as-molded unidirectional cross-ply carbon fiber (tape) reinforcements impregnated with either standard or rubber-toughened epoxy resin exhibited the maximum performance. The materials also displayed a significant tenacification (toughening) after exposed to cyclic loading, resulting from the increased stress (the so-called wear-in phenomenon) and/or strain at the maximum load capacity of the specimens. With no exceptions, two-dimensional woven textile (fabric) pre-forms fractured catastrophically under identical cyclic loading conditions imposed to the fiber tape architecture, thus preventing their residual properties from being determined.

【 授权许可】

CC BY   
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