Term
Failure envelopes are always plotted in terms of which stresses?
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Definition
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| What is the other name for the maximum shear stress criterion? |
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Definition
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Term
What is the other name for the maximum distortion energy criterion?
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Definition
Von Mises Stress Criterion
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Term
A failure envelope for a material is drawn below. Sketch the definition of the factor of safety for
the load case at point A. Has the material failed?
[image] |
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Definition
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Term
The maximum normal stress criterion includes interactions between stress components. (True or False)
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Definition
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Term
The maximum shear stress criterion includes interactions between stress components. (True or False)
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Definition
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The maximum distortion energy criterion includes interactions between stress components.
(True or False)
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Definition
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The Tresca criterion is always more conservative than the Von-Misses stress criterion. (True or
False)
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Definition
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Term
Which criterion works better for ductile materials: maximum distortion energy or maximum normal stress?
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Definition
Maximum Distortion Energy
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Term
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Definition
representation of the relationship of stress S and the number of cycles N before failure of the material.
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Term
What is an endurance limit?
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Definition
A stress amplitude below which a material will not fail no matter the number of cycles.
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Term
Give 3 environmental factors that can decrease the fatigue life of a component.
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Definition
Fretting , corrosion, and stress concentrations
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Term
Define a composite material. |
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Definition
Material composed of two or more constituents (heterogeneous)
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Term
List 2 advantages of composite materials. |
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Definition
Light weight; resistant to corrosion
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Term
| What are the 4 essential steps in the fabrication of a composite structure? |
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Definition
Layup; infiltration; heat transfer; and curing
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Term
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Definition
Pre-preg is a tape or sheet of fibers impregnated with resin (partially cured)
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Term
How many independent material properties does an orthotropic material have?
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Definition
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Term
How many independent material properties does an orthotropic material have assuming a state
of plane stress? List them.
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Definition
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Term
What is the physical meaning of ηsx or ηxy?
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Definition
ηsx -- Characterizes the strain in the x direction caused by the shear stress in the x-y plane.
ηsy – Characterizes the strain in the y direction caused by the shear stress in the x-y plane.
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