# Mche467Test3vocab.txt

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The flashcards below were created by user nick115 on FreezingBlue Flashcards.

1. Shear Center
The point on the cross section plane for which the plane of loading must mass through to avoid twisting of the member
2. Principal plane
• the plane through an element at a point in a stressed body which is free of shear stress.
• HP&VP for element are principal planes
3. Isotropic Material
a material with the same properties in all directions throughout its volume
4. Octahedral stress
A stress which acts on planes which make equal angles with the principal axis. θ1=θ2=θ3
5. Neutral Axis
• The locus of points on a beam's cross section for which the normal stress is zero.
• *NA passes through centroid for pure bending M
6. System
7. any isolated part or portion of a machine or structure
• that we wish to study, may consist of
• particle, several particles, a part of a rigid body, an entire rigid body, or
• even several rigid bodies
8. Section modulus
• the ratio of the moment of inertia to the maximum
• distance from the centroid to the outer fiber of the cross section
9. Shear Strain
the change in a right angle of a stress element subject to pure shear
10. Elasticity
material returns to tis original shape immediately upon removal of load, property of a material that enables it to regain its original configurations after having been deformed.
11. Homogeneity
material has the same properties throughtout its volume
12. Limitations of deflection formula
• 1. Bar is straight
• 2. Bar is axially
• 3. Bar has uniform
• cross section
• 4. No stress
• concentrations
• 6. No residual
• stresses present
• 7. Hooke’s law
• applies
13. Mohr's circle diagram
a graphical solution to the combines stress problem
14. Principal stress
• a particular orientation in the stress element occurs
• in space for which all shear stress components are zero.
15. Normal Strain
elongation per unit length
16. Limitations for stress (F/A) and shear stress
• 1. Bar is straight and made of homogeneous material
• 2. Line of action of
• force coincides with the centroid of the cross section
• 3. St. Venant’s
• principle applies
• 4. No initial
• stresses in material
17. Center of Gravity
• the sum of the moments of the
• areas about the axis through the C.G. must equal zero
18. Pure bending
• when the shear force is zero and there is no net axial
19. Limitations of stress (My/I)
• 1. Beam is subjected to pure bending
• 2. Material is isotropic and homogeneous
• 3. Material obeys Hooke’s law
• 4. Beam is initially straight with a cross section that is constant throughout the beam length
• 5. Beam has an axis of symmetry in the plane of bending
• 6. Cross section of beam remains plane during bending
• 7. No residual stresses or stress concentration
20. Limitations of shear stress (VQ/It)
• 1. Same as bending stress
• 2. Shear stresses are uniformly distributed across the beam width
• 3. Shearing stresses throughout the cross section is the same as the direction of the shear force
• 4. Width of cross section where stress is being computed it small in comparison to the depth of
• the beam
21. True Strain
logarithmic strain, the sum of incremental elongations divided by the current gauge length at load P
22. Stress
a state property at a specific point within a body, a function of load, geometry, temperature, and manufacturing processing
23. Strength
An inherent property of a part, a property built into the part b/c of the use of a particulat material and process.
24. Specific modulus, specific stiffness
E/p, ratio of young;s modulus to density

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 Author: nick115 ID: 106311 Filename: Mche467Test3vocab.txt Updated: 2011-10-04 08:33:50 Tags: mche Folders: Description: Mche467 test3 vocab Show Answers:

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