翻訳と辞書 Words near each other ・ Reinhard Süring ・ Reinhard Theimer ・ Reinhard Treptow ・ Reinhard Tritscher ・ Reinhard von Rüppurr ・ Reinhard von Werneck ・ Reinhard Wendemuth ・ Reinhard Wilhelm ・ Reinhard Zahn ・ Reinhardsbrunn ・ Reinforced carbon–carbon ・ Reinforced concrete ・ Reinforced concrete column ・ Reinforced plastic ・ Reinforced rubber ・ Reinforced solid ・ Reinforced thermoplastic pipe ・ Reinforced-Concrete Highway Bridges in Minnesota MPS ・ Reinforcement ・ Reinforcement learning ・ Reinforcement Regiment ・ Reinforcement sensitivity theory ・ Reinforcement theory ・ Reinfried Herbst ・ Reingard M. Nischik ・ Reingardslivatnet ・ Reingers ・ Reingrabener Schiefer ・ Reingsen ・ Reingser Bach Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Reinforced solid ： ウィキペディア英語版 Reinforced solid In solid mechanics, a reinforced solid is a brittle material that is reinforced by ductile bars or fibres. A common application is reinforced concrete. When the concrete cracks the tensile force in a crack is not carried any more by the concrete but by the steel reinforcing bars only. The reinforced concrete will continue to carry the load provided that sufficient reinforcement is present. A typical design problem is to find the smallest amount of reinforcement that can carry the stresses on a small cube (Fig. 1). This can be formulated as an optimization problem. ==Optimization problem== The reinforcement is directed in the x, y and z direction. The reinforcement ratio is defined in a cross-section of a reinforcing bar as the reinforcement area $A\_$ over the total area $A$, which is the brittle material area plus the reinforcement area. :$\backslash rho\_$ = $A\_$ / $A\_$ :$\backslash rho\_$ = $A\_$ / $A\_$ :$\backslash rho\_$ = $A\_$ / $A\_$ In case of reinforced concrete the reinforcement ratios are usually between 0.1% and 2%. The yield stress of the reinforcement is denoted by $f\_$. The stress tensor of the brittle material is :$$ \left(_ - \rho_ f_ & \sigma _ & \sigma _ \\ \sigma _ & \sigma _ - \rho_ f_ & \sigma _ \\ \sigma _ & \sigma _ & \sigma _ - \rho_ f_ \\ \end}\right ) . This can be interpreted as the stress tensor of the composite material minus the stresses carried by the reinforcement at yielding. This formulation is accurate for reinforcement ratio's smaller than 5%. It is assumed that the brittle material has no tensile strength. (In case of reinforced concrete this assumption is necessary because the concrete has small shrinkage cracks.) Therefore, the principal stresses of the brittle material need to be compression. The principal stresses of a stress tensor are its eigenvalues. The optimization problem is formulated as follows. Minimize $\backslash rho\_$ + $\backslash rho\_$ + $\backslash rho\_$ subject to all eigenvalues of the brittle material stress tensor are less than or equal to zero (negative-semidefinite). Additional constraints are $\backslash rho\_$ ≥ 0, $\backslash rho\_$ ≥ 0, $\backslash rho\_$ ≥ 0. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Reinforced solid」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.