| Project/Area Number |
10650088
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka University |
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Principal Investigator |
TANAKA Masao Graduate School of Engineering Science, Osaka University, Professor, 大学院・基礎工学研究科, 教授 (40163571)
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| Co-Investigator(Kenkyū-buntansha) |
TODOH Masahiro Graduate School of Engineering Science, Osaka University, Research Associate, 大学院・基礎工学研究科, 助手 (10314402)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Biomechanics / Bone / Optimal Design |
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| Research Abstract |
An orthogonal lattice continuum is studied as a model of trabecular architecture of cancellous bone and the relation between parameters of lattice geometry and mechanical characteristics as a continuum is considered in the context of unit cell analysis. A rate equation of orthogonal lattice parameters is described for a phenomenological model of adaptation by bone remodeling by paying attention to some optimality in mechanical function at equilibrium. The lattice continuum model is extended to permit the non-orthogonal lattice intersection, and the lattice parameter determination is considered. The residual stress in trabecular architecture is observed and estimated based on a lattice model.
As an application of cancellous bone-like internal structure to a structural design problem, a topology and shape determination problem is formulated for a variable stiffness structure that realize different stiffness at different level of external load, and a solution procedure is demonstrated. This problem is extended for a design of a material structural system with specified elastic material constants depending on working load level.
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