Mechanical Properties of Alumina Foam/Tri-Functional Epoxy Resin Composites with an Interpenetrating Network Structure / Właściwości Mechaniczne Kompozytów Pianka Korundowa/ Trójfunkcyjna Żywica Epoksydowa O Strukturze Infiltrowanej

Abstract

Methods of measuring effective material properties, including Young’s, Kirchoff’s modulus or Poisson’s ratio for composites with an interpenetrating network structure, where the both constituent phases have widely different physical properties, do not lead to an unambiguous interpretation. The commonly- known static methods have the basic disadvantage that higher strain values are needed in order to obtain proper results which is generally impossible to achieve in the case of brittle materials, e. g. ceramics or polymers, as well as for composites created by connecting both these components. The measurement of strain values during the stress test, decreases the values of Young’s modulus from several per cent to several dozen per cent, due to appearance of micro fractures in the brittle materials. If there are differences in the values, then a special form and an appropriate amount of samples are needed. Dynamic methods of predicting an effective material properties (ultrasonic and impulse excitation of vibration techniques) are much more accurate, and their non- destructive nature mean that the samples can be used again in other experiments. This paper uses the traditional compression test and ultrasonic and impulse excitation of vibration methods to compare and analyze the experimental material properties, such as Young’s modulus, Kirchoff’s modulus and Poisson’s ratio using alumina foam/tri-functional epoxy resin composites with an interpenetrating network structure.

Archives of Metallurgy and Materials

“…Due to the relatively high mechanical strength and open porosity gel-cast foams have many application fields as highly-porous biomaterials as well as other ceramics such as filters, catalyst supports, matrixes for ceramic-metal or ceramic-polymer composites, etc. [11][12][13][14][15][16][17][18].…”