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Micromechanical modeling of graphiti...

Li, Ke.

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Micromechanical modeling of graphitic carbon foams.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Micromechanical modeling of graphitic carbon foams./
作者:	Li, Ke.
面頁冊數:	153 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1513.
Contained By:	Dissertation Abstracts International65-03B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3126283
ISBN:	0496735691

Micromechanical modeling of graphitic carbon foams.
Li, Ke.

Micromechanical modeling of graphitic carbon foams. - 153 p.

Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1513.

Thesis (Ph.D.)--Michigan Technological University, 2004.

Microcellular graphitic carbon foams first developed at the Air Force Research Laboratory (AFRL) in the 1990s are rapidly emerging as a new class of ultra-light cellular materials for structural and thermal management applications because of their excellent physical properties. These three-dimensional (3-D) open-cell carbon foams, like other cellular solids, are topology-sensitive and, therefore, their physics-based modeling requires the incorporation of microstructural features of cells.

ISBN: 0496735691Subjects--Topical Terms:

783786
Engineering, Mechanical.

Micromechanical modeling of graphitic carbon foams.
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245 1 0 $a Micromechanical modeling of graphitic carbon foams.
300 $a 153 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1513.
500 $a Adviser: Xin-Lin Gao.
502 $a Thesis (Ph.D.)--Michigan Technological University, 2004.
520 $a Microcellular graphitic carbon foams first developed at the Air Force Research Laboratory (AFRL) in the 1990s are rapidly emerging as a new class of ultra-light cellular materials for structural and thermal management applications because of their excellent physical properties. These three-dimensional (3-D) open-cell carbon foams, like other cellular solids, are topology-sensitive and, therefore, their physics-based modeling requires the incorporation of microstructural features of cells.
520 $a In this dissertation, four micromechanical models for 2-D and 3-D cellular solids (including graphitic carbon foams) are developed.
520 $a The first micromechanics model for 3-D open-cell foams is developed using an energy method based on Castigliano's second theorem. The analysis is performed on a tetrakaidecahedral unit cell. All three deformation mechanisms of the cell struts (i.e., stretching, shearing and bending) possible under the specified loading are incorporated, and four different strut cross section shapes (i.e., circle, square, equilateral triangle and Plateau border) are treated in a unified manner. Two closed-form formulas for determining the effective Young's modulus and Poisson's ratio of open-cell foams are provided. By applying the newly derived model directly, a parametric study is conducted for carbon foams. The predicted values of the effective Young's modulus and Poisson's ratio compare favorably with those based on existing models and experimental data.
520 $a The second model for 3-D open-cell foams, also based on tetrakaidecahedral unit cells, is developed by using the matrix method for space frames. The effective elastic properties of foams are determined utilizing unit cells subjected to three different modes of loading. This model incorporates all four deformation mechanisms (i.e., stretching, shearing, bending and twisting) possible under the specified loadings and treats four different strut cross section shapes (i.e., circle, square, equilateral triangle and Plateau border) in a unified fashion. The predicted values of the effective properties agree well with those based on existing models for the Mode I loading case, which is the only case that has been well studied. Comparisons of the predicted effective elastic properties for the three loading cases quantitatively show that carbon foams exhibit certain degrees of anisotropy. (Abstract shortened by UMI.)
590 $a School code: 0129.
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710 2 0 $a Michigan Technological University. $3 1032921
773 0 $t Dissertation Abstracts International $g 65-03B.
790 1 0 $a Gao, Xin-Lin, $e advisor
790 $a 0129
791 $a Ph.D.
792 $a 2004
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