Define stress, Mechanical Engineering

Assignment Help:

Define stress:

Sol.: When body is acted upon by load or external force, it undergoes deformation (that is, change in shape or dimension) which increases gradually. At the time deformation, the material of the body resists the tendency of the load to deform the body, and when load influence is taken over by internal resistance of material of the body, it becomes stable. Internal resistance which is offered by body to meet with the load is called as stress.

Or, the force of resistance per unit area, which is offered by a body against deformation, is called as stress. Stress can be considered as total stress or unit stress. Total stress represent total resistance to an external effect and can be expressed in N,KN etc. Unit stress represents resistance developed by unit area of cross section, and can be expressed in KN/m2.

If external load is applied just in one direction, the stress developed is called as simple stress whereas

If the external loads are applied in over one direction, the stress developed is called as compound stress.

Normal stress ( σ ) = P/A N/m2

1 Pascal(Pa) = 1 N/m2

1KPa = 103  N/m2

1MPa = 106  N/m2

1GPa = 109  N/m2 


Related Discussions:- Define stress

Comprehensive awareness, Comprehensive Awareness: Successful entrepreneurs...

Comprehensive Awareness: Successful entrepreneurs should have ability to comprehend complex situations that may include planning, making strategic decisions, and working on multip

Illustrate dynamically equivalent system, Illustrate with required expressi...

Illustrate with required expression for dynamically equivalent system. Illustrate in detail about the Balancing of Radial Engines.

Reaction turbine, REACTIO N TURBINE: The turbine in which the stea...

REACTIO N TURBINE: The turbine in which the steam expands while passing over the moving blades as well as while passing over the fixed blades and the pressure of steam dec

Calculate the component of this vector, (a) Describe a vector and scalar ? ...

(a) Describe a vector and scalar ? (b) What is meant by line of action of vector ? (c) What are displacement vectors and position vector ? (d) Calculate the component of t

Simply supported beam, Select a standard rolled steel I-section for the sim...

Select a standard rolled steel I-section for the simply supported beam shown in figure below. Select an appropriate factor of safety and material strength. Include references for

DESIGN, HOW DO I DESIGN A COMPONENT FOR IMPACT STRENGTH FOR IMPACT LOAD AT ...

HOW DO I DESIGN A COMPONENT FOR IMPACT STRENGTH FOR IMPACT LOAD AT LOWER TEMPERATURE

Determine tension in horizontal rope , Determine tension in horizontal rope...

Determine tension in horizontal rope: Q:  A 500N cylinder, 1 m in diameter is loaded between cross pieces AE and BD that make an angle of 60º with each other and are pinn

Calculate required tractive effort, how can i calculate tractive effort for...

how can i calculate tractive effort for jet ski to start move and how much power necessary ?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd