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The moment of inertia formula is

Ixx= bh3 / 12

B= base H= height and Ixx = moment of inertia of a rectagular section about x-x axis.

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βˆ™ 11y ago
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βˆ™ 5mo ago

The formula for the moment of inertia of a rectangular beam about its centroidal axis is (1/12) * b * h^3, where b is the width of the beam and h is the height. For other beam shapes and sections, the formula for calculating the moment of inertia will vary.

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Q: What is formula of moment of inertia of you section beam?
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How do you calculate moment of inertia of ISMB 600?

The moment of inertia of an ISMB 600 (Indian Standard Medium Weight Beam 600) can be calculated using the formula for moment of inertia of a rectangular section: I = (b*h^3)/12, where b is the breadth of the beam and h is the height. The dimensions for ISMB 600 are typically available from manufacturer specifications or standard engineering handbooks.


How does deflection of a beam vary with moment of inertia?

Deflection is inversely proportional to moment of inertia, the larger the moment of inertia the smaller the deflection. Deflection is (with a simple centerloaded beam) is PL^3/48EI The various deflections are as follows: (i) for a simply supported beam with point load (center)=PL^3/48EI (ii) // // // UDL= 5PL^4/384EI (iii) for a cantilever with point load= PL^3/3EI (iv) // // with UDL= PL^4/8EI visit deflection calculator http://civilengineer.webinfolist.com/str/sdcalc.htm


While finding alternatives section modulus to be checked or moment of inertia to be checked?

If you are looking to find alternatives for a cross-section design, it is generally recommended to check both the section modulus and the moment of inertia. The section modulus helps determine the resistance of a beam to bending stress, while the moment of inertia indicates the distribution of an area about a neutral axis. Both parameters are crucial for ensuring the structural integrity and efficiency of the design.


How do you calculate moment of inertia of I-beam?

To calculate the moment of inertia of an I-beam, you need to know the dimensions of the beam (width, height, flange thickness, web thickness) and the material properties (density). Then you can use the formulas for moment of inertia of a beam to calculate the value. You can also use online calculators or software programs to help with the calculation.


What are the types of moment of force?

The types of moment of force are torque (or moment of force), bending moment, and twisting moment. Torque is the measure of the force causing an object to rotate around an axis, bending moment is the measure of the force causing an object to bend, and twisting moment is the measure of the force causing an object to twist.

Related questions

How do you calculate moment of inertia of ISMB 600?

The moment of inertia of an ISMB 600 (Indian Standard Medium Weight Beam 600) can be calculated using the formula for moment of inertia of a rectangular section: I = (b*h^3)/12, where b is the breadth of the beam and h is the height. The dimensions for ISMB 600 are typically available from manufacturer specifications or standard engineering handbooks.


Relation between tensile stressbending moment and section of modulus?

The relation between bending moment and the second moment of area of the cross-section and the stress at a distance y from the neutral axis is stress=bending moment * y / moment of inertia of the beam cross-section


How does deflection of a beam vary with moment of inertia?

Deflection is inversely proportional to moment of inertia, the larger the moment of inertia the smaller the deflection. Deflection is (with a simple centerloaded beam) is PL^3/48EI The various deflections are as follows: (i) for a simply supported beam with point load (center)=PL^3/48EI (ii) // // // UDL= 5PL^4/384EI (iii) for a cantilever with point load= PL^3/3EI (iv) // // with UDL= PL^4/8EI visit deflection calculator http://civilengineer.webinfolist.com/str/sdcalc.htm


While finding alternatives section modulus to be checked or moment of inertia to be checked?

If you are looking to find alternatives for a cross-section design, it is generally recommended to check both the section modulus and the moment of inertia. The section modulus helps determine the resistance of a beam to bending stress, while the moment of inertia indicates the distribution of an area about a neutral axis. Both parameters are crucial for ensuring the structural integrity and efficiency of the design.


How do you calculate moment of inertia of I-beam?

To calculate the moment of inertia of an I-beam, you need to know the dimensions of the beam (width, height, flange thickness, web thickness) and the material properties (density). Then you can use the formulas for moment of inertia of a beam to calculate the value. You can also use online calculators or software programs to help with the calculation.


How do you increase stiffness of a cantilever beam?

Increase the moment of inertia


Why I-beam's are preferable over rectangular beam's?

You just take an example as rect section with A=17.6*10=176 mm2 and your I section too has same area of 176 mm2. Calculate moment of inertia of rectangular section I = bd3/12 = 1466.66 mm4 For I section, Width of both flange = 20 mm, thickness of both flange = 4 mm, web length=16 mm, web thickness = 4mm. This gives you the same area A=176 mm2 Now Calculate moment of inertia of I section I =8938 mm4 (Do it from any online converter or by calculations) Now compare both Moment of inertia, I section has approx six times better moment of inertia as compared to rectangular section. Put up this moment of inertia values in deflection and bending stress equations and try to compare both. This is because the material is put up in such a way to get maximum moment of inertia with minimum material and min weight. Finally this is the reason why I beams are preferable over rectangular beams Once Put up this moment of inertia values in deflection and bending stress equations and try to compare both. you will get it in sec


Why moment cannot be distributed uniformly over the beam span?

Moment is the product of force and distance. as the distance of the section of the beam varies form the load the moment occuring at different section are different leading to increase in moment with increase in distance of the section from the load. In contineous or fixed structure the support moments are distributed among the members meeting at the joint as per their relative stiffness so the distribution of support moment is not uniform. Note:- relative stiffness the ratio of moment of inertia to the effective length of the member.


Structural analysis formula?

One common structural analysis formula is the equation for calculating bending stress in a beam, which is Οƒ = M*y / I, where Οƒ is the bending stress, M is the bending moment on the beam, y is the distance from the neutral axis to the point of interest, and I is the moment of inertia of the beam's cross-sectional area. This formula is fundamental in determining the maximum stress a beam can withstand before failure.


Units of section modulus?

The units of section modulus are typically in terms of length cubed, such as cubic inches (in^3) or cubic millimeters (mm^3), depending on the system of measurement being used. The section modulus is a measure of a beam's ability to resist bending stress and indicates how far the outer edges of a beam are from its neutral axis.


Plastic section modulus for beam sections- Any computer program for calculating the plastic moment or modulus for any beam section is available?

Plastic Section Modulus about the element local y-direction


What are the types of moment of force?

The types of moment of force are torque (or moment of force), bending moment, and twisting moment. Torque is the measure of the force causing an object to rotate around an axis, bending moment is the measure of the force causing an object to bend, and twisting moment is the measure of the force causing an object to twist.