axial strain (due to axial & moment stress)10.01.03.143
DESCRIPTION
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.TRANSCRIPT
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WELCOME
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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.
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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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