Sandwich panels are widely used in the design of unmanned satellites and addition to having a structural function, can often serve as orbital debris shielding. In this application, sandwich with open-cell foam cores have significant advantage, enabling intensive interaction between impactor fragments ligaments which enhances fragments’ breakdown reduces their damaging potential. Modeling proces...

the brass tubes with foam cores of alsi7sic3, alsi7sic3fe1 and alsi7sic3fe3 were produced as the crush-boxes with circle and square cross-section. then axial compressive behavior and energy absorption capability of the foam-filled tubes were investigated during the quasi-static progressive plastic buckling. the uniaxial compressive stress–strain curves of the foam-filled brass tubes exhibited t...

Abstract A visual observation experiment mimicking the pressure history in foam injection molding was utilized to infer bubbles formation core‐back operations. The different stages of bubble nucleation, dissolution, and re‐nucleation, corresponding injection, packing, opening, respectively, were studied. reduction number density re‐nucleated with respect first nucleation observed. In order unde...

The objective of work was focused to investigate microstructure of polyurethane foam and cyclic crushing strength of its sandwich structure which made of sisal / coir / bamboo / glass fabrics as reinforcement with polyester resin to form composites skin. The tested sandwich panels were constructed four type of FRP faceplates made of sisal / coir / bamboo / glass fiber reinforcements impregnated...

Many natural structures use a foam core and solid outer shell to achieve high strength and stiffness with relatively small amounts of mass. Biological foams, however, must also resist crack growth. The process of crack propagation within the struts of a foam is not well understood and is complicated by the foam microstructure. We demonstrate that in cancellous bone, the foam-like component of w...