Agricultural and Synthetic Polymers.. Biodegradability and by Glass J.E., Swift G.

By Glass J.E., Swift G.

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As a rule of thumb, the gauge section of the specimen should measure at least seven cell dimensions in each direction, and preferably more. Compression-compression fatigue is best explored by loading cuboid specimens between fiat, lubricated platens. It is important to machine the top and bottom faces of the specimens fiat and parallel (for example, by spark erosion) to prevent failure adjacent to the platens. g. 2% for Alporas of relative density 10%). The incubation period for the commencement of shortening defines the fatigue life Nf.

W. (1998) The effect of oxide layers on gas-generating hydride particles during production of aluminum foams. G. G. (eds) Porous and Cellular Materials for Structural Application, Materials Research Society Proceedings, Vol. 521, MRS, Warrendale, PA, USA. , Akiyama, S. and Kitahara, A. (1998) Aluminum foam, ALPORAS, the production process, properties and applications, Shinko Wire Company, Ltd, New Tech Prod. , Amagasaki, Japan. F. (1976) Foaming of metal by the catalyzed and controled decomposition of zirconium hydride and titanium hydride.

1 MPa and recording the corresponding volumetric strain, deduced from the axial displacement. The volumetric strain is assumed to be three times the axial strain. A posteriori checks of specimen deformation must be performed to confirm that the foams deform in an isotropic manner. Characterization methods 33 9 Proportional axisymmetric stress paths are explored in the following way. The direction of stressing is defined by the relation O"m = --~O'e, with the parameter taking values over the range r / - I (for uniaxial compression) to r/-- e~ (for hydrostatic compression).

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