Sandwich structures and foamed materials are typical architectured materials. Their combination p... more Sandwich structures and foamed materials are typical architectured materials. Their combination provides potentially very performant solutions combining stiffness, strength, energy absorption and acoustic damping. The present contribution deals with the integration of a special type of foams, namely hollow spheres stackings, into sandwich structures. Stainless steel hollow spheres main advantage relies on their smooth stress-strain curves and their very good repeatability, compared to other closed cell metallic foams. Therefore these foams are interesting alone but also in sandwich design. A parametric study of the macroscopic behaviour of random stainless steel hollow spheres packing in uniaxial compression was carried out. Scaling laws for the Young's modulus, and for yield strength were established, and they are used to calculate sandwich properties. Then one of the studied metallic hollow spheres packing has been integrated in a sandwich structure with stainless steel faces....
Sandwich structures and foamed materials are typical architectured materials. Their combination p... more Sandwich structures and foamed materials are typical architectured materials. Their combination provides potentially very performant solutions combining stiffness, strength, energy absorption and acoustic damping. The present contribution deals with the integration of a special type of foams, namely hollow spheres stackings, into sandwich structures. Stainless steel hollow spheres main advantage relies on their smooth stress-strain curves and their very good repeatability, compared to other closed cell metallic foams. Therefore these foams are interesting alone but also in sandwich design. A parametric study of the macroscopic behaviour of random stainless steel hollow spheres packing in uniaxial compression was carried out. Scaling laws for the Young's modulus, and for yield strength were established, and they are used to calculate sandwich properties. Then one of the studied metallic hollow spheres packing has been integrated in a sandwich structure with stainless steel faces....
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Papers by Alexandre Fallet