球形孔泡沫铝合金三明治梁的三点弯曲变形

研究了球形孔泡沫铝合金的单轴压缩性能,得到了抗压强度与相对密度的关系;与多边形孔泡沫铝合金和泡沫纯铝作了对比,发现球形孔使力学性能有了较大的提高.根据球形孔泡沫铝合金三明治梁三点弯曲的载荷(P)位移(δ)曲线研究了四种常见破坏模式并建立了破坏模式图.用极限载荷公式得到的计算值与极限载荷的实验值吻合良好.球形孔泡沫铝合金力学性能高于多边形孔泡沫铝合金及泡沫纯铝,因而其三明治梁的力学性能最好.

Deformation of sandwich beams with spherical pore Al alloy foam core in three-point bending

The uniform axis compression capability of spherical pore Al alloy foam was studied and the relationship between compression strength and relative density was acquired. A comparison was made among the spherical pore Al alloy foam, polygonal pore Al alloy foam and Al foam. It is concluded that the spherical pore Al alloy foam has more good mechanics property than others two spherical pore. The load-deflection curve of sandwich beams with spherical pore AI alloy foam core loaded in three-point bending and the four kinds of failure mode were investigated and the failure map of sandwich beams was founded. The calculated values with peak load formulae coincide well with the experimental ones. It is concluded that the sandwich beams with core of spherical pore Al alloy foam is excellent for more good mechanics property.