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# Presentation AXIAL STRAIN (DUE TO AXIAL AND MOMENT STRESS)

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AXIAL STRAIN
(DUE TO AXIAL AND MOMENT STRESS)
Name: Ebne Rashid Shagor
ID: 10.01.03.093

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### Presentation AXIAL STRAIN (DUE TO AXIAL AND MOMENT STRESS)

1. 1. AHSANULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
2. 2. Name: Ebne Rashid Shagor ID: 10.01.03.093
3. 3. AXIAL STRAIN (DUE TO AXIAL AND MOMENT STRESS)
4. 4. WHAT IS STRAIN? Strain is the ratio of the change in length caused by the applied force, to the original length. Here, strain=δ/L
5. 5. AXIAL STRAIN Axial strain in a longitudinal member ( a pole, column, strut or cable, for example) would be the increase in length over the original length when it is pulled (tensile strain) or pushed (compressive strain).
6. 6. An axial bar of length L, and cross-sectional area A, subjected to tensile force P, elongates by an amount, ∆. The change in length divided by the initial length is termed as Axial Strain or simply strain (∆/L). The symbol used for engineering strain is E (epsilon). Strain, E = ∆/L where ∆ is the deformation and L is the original length. Thus, strain(E) is dimensionless.
7. 7. ASSUMPTIONS: 1.Strain is positive in tension (D>0 means e<0) and negative in compression (D<0) 2.Strain is a non-dimensional length - a fraction. Because strain is small, it is often given as a percentage by multiplying by 100%: e.g., e = 0.003 = 0.3%.
8. 8. AXIAL STRESS A stress that tends to change the length of a body in axial direction. Two types of Axial stress: Tensile stress is axial stress that tends to cause a body to become longer along the direction of applied force. Compressive stress is axial stress that tends to cause a body to become shorter along the direction of applied force.
9. 9. BENDING MOMENT STRESS An internal tensile or compressive longitudinal stress developed in a beam in response to curvature induced by an external load.
10. 10. TYPES OF STRAIN: Tensile strain: When we apply a tensile force on a body its length increases. The ratio of increase in length to the original length. Tensile strain εt = L – L0 / L Where L = Original length L0 = new length
11. 11. Compressive strain: When we apply a compressive force on a body its length decreases. The ratio of decrease in length to the original length is called compressive strain. Compressive strain = εc = L – L0 / L Where, L = Original length L0 = new length
12. 12. THANK YOU