Questions tagged [fracture]
18 questions
49
votes
2 answers
Why Do Sausages Always Split Lengthwise?
Sausages universally split parallel to the length of the sausage. Why is that?
Dale
- 6,150
11
votes
1 answer
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:…
David
- 115
6
votes
1 answer
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 collect...
This makes me curious enough but as my level…
dmtri
- 163
4
votes
2 answers
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 a crack is made, do you need to overcome the…
user45261
- 41
3
votes
1 answer
Does glass shatter when hit by projectiles with a threshold momentum or a threshold kinetic energy?
Consider a sheet of glass (or any other breakable solid). Suppose you have many identically prepared copies of the same sheet, and you launch a bunch of fast-moving projectiles at the sheet from a directly perpendicular direction. You vary both the…
tparker
- 51,104
3
votes
1 answer
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 hydrostatic loading? Will the atomic bonds break when they…
lucas
- 3,199
2
votes
2 answers
How to predict whether and where a rod breaks?
Given a distribution of shear force on a uniform rod, how do we determine whether the rod will break? And if it does break, at which point is it most likely to break? Is it at the point where shear force is at maximum?
These questions come from my…
Yu Lu
- 101
2
votes
0 answers
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?
Haodong Du
- 29
1
vote
1 answer
What determines if a transgranular or intergranular fracture is more likely to occur?
As an example, why does glass tend to break by means of intergranular fracture?
My analysis so far led me to believe that the tendency can be related to the intermolecular bond strength in a given crystal grain and the intergranular bond strength. A…
hendlim
- 856
1
vote
1 answer
Using Hertzian contact mechanics to explain fracture cones when an elastic sphere is pressed onto an elastic half space
I'm trying to understand the Hertzian cone fracture process from a continuum mechanics point of view. I'm considering a problem where an elastic sphere is pressed quasi-statically onto an elastic semi-infinite space. Following chapter 2 in the…
MOOSE
- 537
1
vote
1 answer
Deformation/Fracture from Impact
What equations predict the deformation from two objects colliding? Such as dropping a heavy ball onto a plate of metal. Source references would help, I havent found much anything yet.
WaltRed
- 11
1
vote
1 answer
Determine throwing angle from fractured glass
Our neigbours glass windows has allegedly been shattered by neibouring kids. The question is whether the stone came from below the window thrown by someone standing on the ground or above the window from someone standying on the adjacent roof. Is it…
1
vote
0 answers
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 strain develops in both materials.
My first…
scomtott
- 11
1
vote
1 answer
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.
0
votes
1 answer
Difference between tensile strength and work of fracture
Can someone please explain the difference between tensile strength and work of fracture of a material? What is the need to know the work of fracture if we already knew the tensile strength of the material? I couldn't understand it intuitively. An…
Fahim
- 1