期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.142081
关键词
characterization; modelling/simulations; composites; casting methods
类别
资金
- NRDI Fund by the NRDI Office under the Ministry for Innovation and Technology [BME-IE-NAT, BME-NC]
Metal matrix syntactic foams (MMSFs) with varying matrix properties were produced by pressure infiltration process, and their characteristic properties under different constraints were analyzed. The compressive behavior of MMSFs was found to be influenced by relative density and matrix properties, and their constitutive law was formalized using the Shima-Oyane model for implementation into finite element systems.
Metal matrix syntactic foams (MMSFs) with Al alloy matrix (Al99.5 and AlSi12) and pure Fe metallic hollow spheres (MHSs, 64 vol%) were produced by pressure infiltration process. The density of the produced MMSFs was between 1.18 and 1.54 g cm(-3). Cylindrical samples were investigated by compressive tests in free (between rigid plates) and radially constrained (in a thick wall steel sleeve) condition. The compressive curves were generalized, and the characteristic properties were identified (structural stiffness, yield strength, plateau strength, energy absorption). The general compressive curves altered in their plateau region: in free condition the plateau was flat, in constrained condition it was increasing. The characteristic properties of the MMSFs could be described by scaling laws and were influenced by the matrix properties and by the relative density of the samples. For the implementation of MMSFs into finite element systems, their constitutive law was formalized by the implementation of the Shima-Oyane model.
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