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is a resisstance of a body is called inertia
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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
What is torsion stress?
I need to calculate the stress resulting from a torsion moment on a hollow steel section as well as a flat plate.
What is the relationship between bending and strain?
From the Hooke law, stress s is proportional to strain e; s = Ee where E is elastic modulus of the material; the stress is the bending stress which varies from plus on one surface to minus on the opposite surface.
What is the difference between shear stress and bearing stress?
Sear stress are forces applied in opposition, producing a shearing or tearing force. Bearing stress is a load placed in one direction, such as the weight of a building bearing on the foundation.
Strain-stress diagram of copper and steel?
difference between Strain-stress diagram of copper and steel?
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
What is the difference between Bending STRESS and Direct Stress?
direct stress is a stress normal to the cross section, A, and is the result of an axial load, P. direct stress = P/A Bending stress also acts normal to the cross section but varies from tension on one side and compression on the other. and is the result of a bending moment, M. bending stress = Mc/I where I is the area moment of inertia and c the distance from outer fiber to neutral axis
What is the relation between ultimate and allowable stress?
ultimate stress=Factor of safety*Allowable stress
What is the importance of section modulus?
Sectional modulus of any section determines the strength of a section, i.e. if two sections made up of same material then the section with higher section moduls will carry higher load as the allowable stress is constant for a given material. in analysis of it is useful in determining the maximum stress value to which the section is subjected when the moment is konwn from the relation f=(M/Z) where f= stress at extreem fibre M= maximum bending moment on section Z= section modulus = (moment of inertia/ distance of extreem fibre from NA)
What is the relation between stress gradually applied and suddenly applied?
Stress suddenly applied load = 2 x stress gradually applied
Moment of inertia is a cross sectional property that gives the engineer an indication of the stiffness of a particular shape value can used to?
find the strength of the member subject to bending or shear. Moment of inertia is used to find radius of gyratia or flexural regidity so that member strength flexural stress is found
Are moment of resistance and section modulus the same?
Yes, it is.Moment of resistance, usually denoted as W is a term in structural engineering. It is found from the moment of inertia I and the distance from the outside of the object concerned to its major axis e. W = I/eIt is used in structural calculations since the stress can be written as stress=moment/WSection modulus (Rigidity) : The ratio of moment of Inertia of the section (I) to the distance from it neutral axis to the most remote fiber (c)I am not an engineer and I never studied any of this properly, but as far as I can see, it's two names for the same thing.I was able to calculate successfully the moment of resistance from the (moment of inertia) / (distance from the outside of the section (on the same x/y axis) to the center)which means I must be getting it right.
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
What are the relation between tensile stress and shear stress and bearing stress?
Tensile Stress is approximately two times the shear stress.Relationship bet n Tensile Stress and bearing stress varies from application to application.It Depends on Various Factors.
What is the use of moment of inertia?
moment of inertia is the rotational equivalent of mass. it is given by I= Mk2 moment of inertia in rotational motion play the same role as mass in linear motion, that is in linear motion f = ma while in rotation, torque= I*Angular acceleration where I is the moment of inertia
What is Moment of resistance?
Moment of resistance, ususally denoted as W is a term in structural engineering. It is found from the moment of inertia I and the distance from the outside of the object concerned to its major axis e. W = I/e It is used in structural calculations since the stress can be written as stress=moment/W It really works much better with graphical explanation which i unfortunately can't add in simple moment of resistance means couple produce when a beam subjected to bending under the action of loads.
What is moment resistance?
Moment of resistance, ususally denoted as W is a term in structural engineering. It is found from the moment of inertia I and the distance from the outside of the object concerned to its major axis e. W = I/e It is used in structural calculations since the stress can be written as stress=moment/W It really works much better with graphical explanation which i unfortunately can't add in simple moment of resistance means couple produce when a beam subjected to bending under the action of loads.
