| 1 | Structural modeling of sandwich structures with lightweight cellular cores显示文摘一个有效单个分层的有限元素(FE ) 计算模型被建议预言有二的小三明治面板的结构的行为维(2D ) 棱柱或三维(3D ) 捆绑核心。细胞的核心拓扑学的三种不同类型被考虑:金字塔形捆绑核心(3D ) , Kagome 捆绑核心(3D ) 和弄皱的核心(2D ) ,代表三种材料 anisotropy:orthotropic,单斜晶、一般各向异性。一种 homogenization 技术被开发获得细胞的核心的一致宏观的僵硬性质。与使用详细 FE 模型获得的结果比较,单身的分层的计算模型能给可接受的预言因为静电干扰和 orthotropic 的动态行为捆绑核心三明治面板。然而,为 non-orthotropic 3D 捆绑核心,预言不那么好。因为 2D 的静态、动态的行为弄皱核心三明治面板,预言由单身的分层的计算模型发源当联合起来的房间的尺寸在某个范围以内变化时,通常是可接受的,与为为弱核心的比那些更精确的中等强壮或强壮的弄皱的核心的预言。 | T.Liu Z.C.Deng T.J.Lu | 2007 | Acta Mechanica Sinica2007，23，5： | 11 |
| 2 | Snap-through of an elastica under bilateral displacement control at a material point显示文摘Snap-through phenomenon widely occurs for elastic systems,where the systems lose stability at critical points.Here snapthrough of an elastica under bilateral displacement control at a material point is studied,by regarding the whole elastica as two components,i.e.,pinned-clamped elasticas.Specifically,stiffness-curvature curves of two pinned-clamped elasticas are firstly efficiently located based on the second-order mode,which are used to determine the shapes of two components.Similar transformations are used to assemble two components together to form the whole elastica,which reveals four kinds of shapes.One advantage of this way compared with other methods such as the shooting method is that multiple coexisting solutions can be located accurately.O n the load-deflection curves,four branches correspond to four kinds of shapes and first two branches are symmetrical to the last two branches relative to the original point.For the bilateral displacement control,the critical points can only appear at saddle-node bifurcations,which is different to that for the unilateral displacement control.Specifically,one critical point is found on the first branch and two critical points are found on the secondary branch.In addition,the snap-through among different branches can be well explained with these critical points. | Q.Wang H.L.Zou Z.C.Deng | 2020 | Acta Mechanica Sinica2020，36，3： | 0 |
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