層板結構具有質量輕及高勁度與強度等特性，已廣泛應用於輕質結構工程上，然而層板結構於承受到固定應力載重作用，於較高溫度環境下將產生顯著的潛變行為，為防止潛變所造成層板結構的破壞，深入探討層板結構之潛變速率實屬必要，故本研究主要針對含蜂巢心材層板於承受載重作用所產生之潛變行為。影響層板潛變速率因素有很多，其中包括面板材料與厚度、心材相對密度與厚度、溫度等，皆將影響層板的潛變行為。首先，依照層板彎曲理論，決定蜂巢心材主要承受剪應力，建立一具變剖面微構件蜂巢材料之理論分析模式，針對該模式承受剪應力作用下之潛變變形，理論推導包含平面上與平面外之剪應變速率，再代入層板變位關係式中，獲得含蜂巢心材層板的潛變表示式。另外，應用數值分析結果，建立此層板與蜂巢心材微結構之關係式，並探討蜂巢心材微結構對層板潛變行為的影響，藉研究成果可提供設計蜂巢心材最佳微結構之參數與依據。

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[1]J. F. Young, S. Mindess, R. J. Gray and A. Bentur, “The Science and Technology of Civil Engineering Materials,” Prentice Hall, 1998.

[2]L. J. Gibson, M. F. Ashby, “Cellular Solid: Structure and properties,” 2nd edition, Cambridge University Press, 1997.

[3]林金源,“微構件變剖面對蜂巢與泡沫材料依時性質之影響,”土木工程研究所 博士論文, 2004.

[4]C. Chen and N. A. Fleck and M. F. Ashby, “Creep Response of Sandwich Beams with a Metallic Foam Core,”Advanced Engineering Materials, No.10 777-780, 2002.

[5]O. kesler, L. K. Crews and L. J. Gibson, “Creep of sandwich beams with metallic foam cores,” Materials Science & Engineering, A341 264-272, 2003.

[6]M. F. Ashby, A. G. Evans, N. A. Fleck, L. J. Gibson, J. W. Hutchinson and H. N. G. Wadley, “Metal Foams: A Design Guide,” Butterworth-Heinemann, 2000.

[7]A. E. Simone and L. J. Gibson, “Effects of solid distribution on the stiffness and strength of metallic foams,” Acta Materialia Vol.46, No.6, 2139-2450, 1998.

[8]C. H. Chuang and J. S. Huang, “Effects of solid distribution on the elastic buckling of honeycombs,” International Journal of Mechanical Sciences, 44:1429-1443, 2002.

[9]J. M. Gere and S. P. Timoshenko, “Mechanics of Materials” forth edition, 東華書局.

[10]C. H. Chuang and J. S. Huang, “Elastic moduli and plastic collapse strength of hexagonal honeycombs with plateau borders,” International Journal of Mechanical Sciences, 44:1827-1844, 2002.