Elastic-Plastic Local Deformation and Collapse of Shells in Contact
接触壳体的弹塑性局部变形和塌陷
基本信息
- 批准号:61550080
- 负责人:
- 金额:$ 1.15万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1986
- 资助国家:日本
- 起止时间:1986 至 1987
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Large elastic-plastic deformation and collapsing process occurred in shells in contact with each other have been examined numerically and experimentally. Basic knowledge to estimate the damage suffered by the shell on the occasion of contact or collision with the rigid body or the shell has been established.An algorism of numerical analysis for the contact problem involving finite amount of mutual sliding has been developed and the penalty function method is used for the algorism to build in the numerical procedure based on the finite element method.The numerical simulations of the contact problems of spherical and cylindrical shells were performed and the details of the contact buckling and collapse process were discussed. The following results have been obtained concerning the damage of contact of the shells: (1) The condition of friction on the contact surface plays very important role. (2) If the frictional coefficient is not so small, deformaion under sticking (without mutual slide) continues up to the considerable amount and as a consequence, the both bodies (shells) suffer remarkable damage. (3) If the frictional coefficient is small, mutual sliding on the contact surface occurs and the body in which the elastic unloading results behaves like the rigid body after sliding and the serious damage is caused to the other body. (4) Therefore, the estimation of the damage necessitates to know the local rigidity of shear deformation of the body resisting the frictional force in the contact surface.From the experimental observations of the contact bucking of the spherical and cylindrical shells, the role of the non-symmetric deformation is discussed on the stability of the buckling process, which is very difficult to estimate by theoretical analysis.
对相互接触的壳体发生大的弹塑性变形和坍塌过程进行了数值模拟和实验研究。建立了壳体在与刚体或壳体接触或碰撞时的损伤估计的基本知识。建立了有限相互滑动接触问题的数值分析算法,并采用罚函数法建立了基于有限元方法的数值分析程序。对球壳和圆柱壳的接触问题进行了数值模拟,讨论了接触屈曲和破坏过程的细节。壳体接触损伤的研究结果如下:(1)接触面上的摩擦条件起着非常重要的作用。(2)在摩擦系数不太小的情况下,粘着(无相互滑动)变形持续到相当大的程度,从而使两体(壳)都受到显著的破坏。(3)当摩擦系数较小时,接触面上发生相互滑动,弹性卸荷后的物体表现为滑移后的刚体,对另一物体造成严重损伤。(4)因此,损伤的估计需要知道在接触面上抵抗摩擦力的物体的剪切变形的局部刚度。通过球壳和圆柱壳接触屈曲的实验观察,讨论了非对称变形对屈曲过程稳定性的影响,这是很难用理论分析来估计的。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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KITAGAWA Hiroshi其他文献
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2018 - 期刊:
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YUASA Hideto;MANTANI Youhei;MASUDA Natsumi;NISHIDA Miho;ARAI Masaya;YOKOYAMA Toshifumi;TSURUTA Hiroki;KAWANO Junichi;HOSHI Nobuhiko;KITAGAWA Hiroshi;万谷洋平,春田知洋,西田美穂,横山俊史,星 信彦,北川 浩 - 通讯作者:
万谷洋平,春田知洋,西田美穂,横山俊史,星 信彦,北川 浩
ウマ滑膜由来間葉系幹細胞を用いて作製した3次元立体構造体による膝関節荷重面の骨軟骨再生
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- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
YUASA Hideto;MANTANI Youhei;MASUDA Natsumi;NISHIDA Miho;ARAI Masaya;YOKOYAMA Toshifumi;TSURUTA Hiroki;KAWANO Junichi;HOSHI Nobuhiko;KITAGAWA Hiroshi;村田大紀,石川真悟,齋藤靖生,須永隆文,十川英,藤木誠,三角一浩,中山功一,帆保誠二,畠添孝 - 通讯作者:
村田大紀,石川真悟,齋藤靖生,須永隆文,十川英,藤木誠,三角一浩,中山功一,帆保誠二,畠添孝
KITAGAWA Hiroshi的其他文献
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