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3 years ago

Describe a quadrilateral that cannot be placed in the hierarchy under trapezoids.

1 answer:

5 0

A quadrilateral is a shape that has four equal sides.
For example:square,rectangle.(basically these are the ones i can think of)
parallelograms are also quadrilaterals.parallelograms is a quadrilateral with 2 pairs of parallel sides.
a square cant be in the hierarchy under traoezoids and rectangles,rombuhs.
these are the ones i can think of

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A structural component in the form of a wide plate is to be fabricated from a steel alloy that has a plane strain fracture tough

bogdanovich [222]

Answer:

a > 3 mm

so that critical flow is subject to detection

Explanation:

plane strain fracture toughness = 98.9 MPa root m

yield strength = 860 MPa

flaw detection apparatus = 3.0 mm

Y = 1

solution

we know critical stress formula that is

critical stress $\sigma c = \frac{K}{Y\sqrt{\pi * a} }$ .............................1

here K is design stress plane strain fracture toughness and a is length of surface creak

so here length of surface creak will be

length of surface creak a = $\frac{1}{\pi} * (\frac{K}{Y*{\sigma}})^2$

put here value

a = $\frac{1}{\pi} * (\frac{98.9\sqrt{m}}{1*{\frac{860}{2}}})^2$

a = 0.0168 m = 16.8 mm = 0.66 in

a > 3 mm

so that critical flow is subject to detection

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Allushta [10]

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Answer:

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