Centroides y Momentos de Inercia de Área para Formas 2D
- Page ID
- 83877
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)Se muestra la forma con área y ubicación centroide | Momentos de inercia de área rectangular | Momentos de inercia en el área polar |
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Rectángulo \(Area = bh\) |
\ begin {align*} i_x &=\ frac {1} {12} b h^3\\ [4pt] i_y &=\ frac {1} {12} b^3 h\ end {alinear*} |
\( J_z = \dfrac{1}{12} bh(b^2 + h^2) \) |
Triángulo Recto \(Area = \dfrac{1}{2} bh\) |
\ begin {align*} i_x &=\ frac {1} {36} bh^3\\ [4pt] i_y &=\ frac {1} {36} b^3 h\ end {alinear*} \ begin {align*} I_ {x'} &=\ frac {1} {12} bh^3\\ [4pt] I_ {y'} &=\ frac {1} {12} b^3 h\ end {alinear*} |
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Triángulo \(Area = \dfrac{1}{2} bh\) |
\(I_x = \dfrac{1}{36} bh^3\) \(I_{x'} = \dfrac{1}{12} bh^3\) |
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Círculo \(Area = \pi r^2\) |
\ begin {align*} i_x &=\ frac {\ pi} {4} r^4\\ [4pt] i_y &=\ frac {\ pi} {4} r^4\ end {alinear*} |
\(J_z = \dfrac{\pi}{2} r^4\) |
Anulo Circular \(Area = \pi (r_o^2 - r_i^2) \) |
\ begin {align*} i_x &=\ frac {\ pi} {4} (r_o^4 - r_i^4)\\ [4pt] i_y &=\ frac {\ pi} {4} (r_o^4 - r_i^4)\ end {align*} |
\(J_z = \dfrac{\pi}{2} (r_o^4 - r_i^4)\) |
Semicírculo \(Area = \dfrac{\pi}{2} r^2\) |
\(I_x = \left( \dfrac{\pi}{8} - \dfrac{8}{9 \pi} \right) r^4 \) \(I_y = \dfrac{\pi}{8} r^4\) \(I_{x'} = \dfrac{\pi}{8} r^4\) |
\(J_z = \left( \dfrac{\pi}{4} - \dfrac{8}{9 \pi} \right) r^4\) |
Cuarto de círculo \(Area = \dfrac{\pi}{4} r^2\) |
\ begin {align*} i_x &=\ left (\ frac {\ pi} {16} -\ frac {4} {9\ pi}\ derecha) r^4\\ [4pt] i_y &=\ left (\ frac {\ pi} {16} -\ frac {4} {9\ pi}\ derecha) r^4\ end {align*} \ begin {align*} I_ {x'} &=\ frac {\ pi} {16} r^4\\ [4pt] I_ {y'} &=\ frac {\ pi} {16} r^4\ end {alinear*} |
\( J_z = \left( \dfrac{\pi}{8} - \dfrac{8}{9 \pi} \right) r^4 \) |
Elipse \(Area = \pi ab\) |
\ begin {align*} i_x &=\ frac {\ pi} {4} ab^3\\ [4pt] i_y &=\ frac {\ pi} {4} a^3 b\ end {alinear*} |