Questions tagged [fracture]

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What is the physical meaning of “critical crack length”?

There are two equations that are primarily used in context of the fracture stress one with $\sqrt{\frac{\gamma E}{a_0}}$and the other with $\sqrt{\frac{2\gamma E}{\pi C}}$.I do not understand which ...
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23 views

If the heat capacity of an object changes does the internal energy or temperature of the object change?

Consider a spherical particle of material B contained in a spherical shell of material A. The thermal expansion coefficient of B is greater than that of A so that when the object is heated an internal ...
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1answer
83 views

Why does my baby's feeding bottle get smashed in fewer pieces when fuller?

After and after again my baby has tossed in the air his glass made feeding bottle and get it smashed on the floor, I realized that the more the milk the bottle has the fewer fragments I had to ...
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1answer
400 views

Does the square cube law always hold?

Water has surface tension but surface tension doesn't follow the square cube law. To reduce the size of its meniscus by half, you require 4 times the gravitational field strength. According to the ...
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1answer
90 views

Will fracture occur under very high hydrostatic pressure?

In the case of tensile loading, the distances between atoms or molecules increase and finally the material is broken because of bonds breakage between atoms or molecules. But, what about the ...
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1answer
2k views

Crack pattern of safety glass - what gives rise to spider web-like shape

When (laminated) security or shatter-proof glass fractures, the ensuing crack-pattern is often resembling a spider web, with radial and concentric cracks, see e.g. (Source: http://essentialhommemag....
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1answer
371 views

Why a bullet leaves a hole on glass where stone makes scratch?

When we throw a stone it breaks the glass with scratches. But when a bullet hits the glass it leaves a small hole(not always) . I want to know the specific reason behind making hole and scratch.
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80 views

Why is there roughness on every surface?

Why is there roughness on every surface? I think a smooth surface could better minimize the surface energy. Besides, why does the roughness happen to be fractal?
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2answers
337 views

What forces are present when slicing an object?

I found here: What happens when we cut objects? that it is due to fracture wood splits open when using a wedge. Does it only apply when the wedge is already in the wood? How about the moment before ...
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2answers
8k views

Why Do Sausages Always Split Lengthwise?

Sausages universally split parallel to the length of the sausage. Why is that?