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Axial strain (due to axial & moment stress)10.01.03.143

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This power point presentation on Axial strain (due to axial & moment stress) is presented by me for the partial fulfillment of CE 416 course. I got full marks on this presentation. Thanks those who helped me hugely during preparation of this presentation.

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Page 1: Axial strain (due to axial & moment stress)10.01.03.143

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WELCOME

Page 2: Axial strain (due to axial & moment stress)10.01.03.143

Dept. of Civil Engineering

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AHSANULLAH UNIVERSITY OF SCIENCE & TECHNOLOGY

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Presentated ByShaikh Mahfuzur Rahman

Course No: CE 416Course Teacher:

Munshi Galib Muktadir & Sabreena Nasrin(Lecturer)

4th Year 2nd SemesterSection: CStudent ID: 10.01.03.143

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AXIAL STRAIN

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Key Topics Covered In This Presentation

Strain-Longitudinal StrainTransverse Strain

Stress-Axial StressMoment Stress

Stress Strain Relationship Axial Strain due to Axial Stress & Moment

Stress Consideration of Strain in structural design.

Page 6: Axial strain (due to axial & moment stress)10.01.03.143

Stress

Internal resistance of force per unit area offered by a body against deformation.

P = External force or loadA = Cross-sectional area

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Axial Stress

A tension or compression stress created in a structural member by the application of a lengthwise axial load.*

7*Definition Copyright ©1989 CRC Press LLC

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Example of Axially Loaded Structural Member

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Example of Axially Loaded Structural Member (Truss)

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Strain

Change in dimension of an object under application of external force is strain.Δ L = Change in lengthL o = Initial Length

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Strain

Strain is positive in tension (>0) and

negative in compression (<0) Strain is a non-dimensional length Always a fractional value.

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Type of Strain

Longitudinal Strain Transverse Strain

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POISSON'S RATIO:

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MOMENT

Moment is the tendency of a body to rotate about an axis as a result of a force acting over a lever arm.

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MOMENT STRESS

Stress that occurs due to moment in a structural member.

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MOMENT STRESS

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Axial Strain & Stress(Axial & Moment Stress) Relationship

The stress imposed on a solid body is directly proportional to the strain produced, within the elastic limit.

i.e. ∝ [Hooke's Law]

=EE=Young’s Modulus

of Elasticity

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• Initial straight line portion

• Max. stress at about 0.002 strain

• Rupture at about 0.003 strain

Behavior of Concrete Under Strain

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Stress Strain Behavior of Steel

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Compression Controlled Section

Fig. 3c

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Strain levels At Different Stress Level

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Strain Level At Balanced Condition

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THANK YOU

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Any Question?

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