...The first is the nonlinear behavior of materials. In linear structural analysis, the stress of materials is assumed to be in a small range, but the nonlinearity of materials cannot be ignored in ultimate strength theory that deals with the destruction of structures. The second is called geometric nonlinearity. When the deformation of a structure becomes large compared to the dimensions of its components, the deformation must be taken into account to establish a balance condition, but in linear analysis, the deformation is assumed to be minute and the balance equation is written based on the geometric shape of the structure before deformation. The third is the correlation between axial force and bending deformation. In theory, this is a special case of the second cause, but in practice it is extremely important. ... *Some of the terminology that refers to "geometric nonlinearity" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…第1は材料の非線形挙動であり,線形構造解析では材料の応力が小さい範囲にあると仮定しているが,構造物の破壊を対象とする終局強度理論では材料の非線形性は無視できない。第2は幾何学的非線形といわれるもので,構造物の変形が部材の寸法に比べて大きくなると,変形を考慮してつり合い条件を立てなければならないが,線形解析では変形が微小であるとして変形前の構造物の幾何学的形状に基づいてつり合い式を書いている。第3は軸方向力と曲げ変形との相関で,理論的には第2の原因の特別の場合であるが,実際問題としてはきわめて重要である。… ※「幾何学的非線形」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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