In this paper ， effects o ｛ヒ he constrained condition alung the edges on dle mec ｝ 1anical propcrties 〔 iniしial stiffnestsi E ＊ and p ！astic collapse strengLh σ 読) 〔 〕 f lattice structures are discussed based on theoretlcat ar ／ d numerical stress analysis ， FEM ． The mechanical properties strQ1 ユgly depefid on t／ he number 〔 ＞ f ullit cel ］ill Lhree dircctions． 7／， ン， 劉 and if the number alollg し he loading dlrectlq1鵡 ・ ⊥ ， the deformed n ， attcrn occurrle 〔ヒ in a lattice structure can be classi 正 1ed 量 nto three types ， arld しhe niechai ⊇ ica］ pl ． oi )erties can be ustinnated by using theoretica ユresu ユ ts of E ＊ and σ 涜 fol ． each types with ugQod accuracy ， M ⊂ )reover 、 the sLructure having the same n しLmb ∈r of unit cell jn z ' and 1 ／direction ( A｛

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