多孔复合材料静态准静态循环压缩载荷下机械性能.pdfVIP

J Mater Sci (2012) 47:5635–5645 DOI 10.1007/s10853-012-6432-0 SYNTACTIC COMPOSITE FOAMS Mechanical behavior of a cellular composite under quasi-static, static, and cyclic compression loading Sergej Diel • Otto Huber • Holger Saage • Paul Steinmann • Werner Winter Received: 30 September 2011 / Accepted: 20 March 2012 / Published online: 3 April 2012 Springer Science+Business Media, LLC 2012 Abstract The quasi-static, static, and cyclic compressive and good thermal and acoustic isolation. Thus, these behavior of a novel epoxy matrix cellular composite rein- materials are often used in structural applications, e.g., as forced with glass foam granules is investigated. Three lightweight core materials of sandwich structures or as different grain-size fractions of the granules are used: crash absorbers in passenger vehicles [ 1]. On the other 0.5–1, 1–2, and 2–4 mm. The density of the cellular hand, cellular solids have relatively low specific stiffness composite varies between 0.65 and 0.82 g/cm3. The and compressive strength, thereby limiting their possible material exhibits high specific compressive strength and applications [2]. Furthermore, it is difficult in practice to stiffness within the class of cellular materials; these prop- achieve a homogeneous cell size distribution which is erties can be varied using appropriate size of granules. The required to reduce the variation of the mechanical glass foam granules increase the stiffness of the cellular properties. composite compared to neat epoxy foam with the same Syntactic foams, a class of closed-cell foams, offer weight. The measured elastic properties are in good additional useful properties such as high specific stiffness agre