Questions tagged [thermal-expansion]

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Calculating Bending Force on a Fixed Metal Plate

At work we've had a steel pipe support break on us, and I can't for the life of me figure out what happened. Here's some background info: A long (125m) steel heating pipe (ø51mm) is suspended, resting ...
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1answer
32 views

How much an unevenly heated glass plate bows?

In relation to this question about 3D printing, I wonder how much a 200 mm square glass plate heated only in a central 15 cm square region would bow upwards or downwards. According to the thermal ...
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Thermal expansion during the course of melting (in metals specifically)

The question is with regards to Thermal Expansion at the point of melting. My basic understanding is that a material will generally undergo linear thermal expansion until some phase change occurs (...
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0answers
17 views

Can we use a drain-back over-heat protection system for heat pipe solar water heating system?

It is clear that one method of over heat protection of solar water heating systems is to drain water from the collectors into a reservoir so this way the system is protected from overheating of the ...
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0answers
21 views

Can we use an open expansion tank in solar water heating system?

We all know that in an indirect (closed loop) hydronic system, an expansion tank is needed ,to deal with thermal expansion of the circulating water, that can be either open expansion or closed ...
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1answer
42 views

Structural analysis + thermal expansion using ANSYS static module

I am attempting to model a steel sample subjected to combined mechanical and thermal loading. The thermal loading can be quite elevated, where reduction in the elastic modulus will occur. Does anyone ...
2
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1answer
40 views

Direct Optimisation - How to Create Time Efficient Study

I made a simulation of this cylinder that is being suspended mid air and held up by 8 rods, 4 on top and 4 on the bottom. The entire model is cooled to 15K I managed to find the forces required for 6 ...
2
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1answer
200 views

Thermal expansion of a hole in a plate with a temperature gradient

I have a rectangular metal plate with a hole in it (with diameter of 300 mm). The plate has a temperature gradient going from one of its short sides to the other, I can measure the temperature ...
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1answer
33 views

Can a reinforced hose develop an internal restriction due to thermal expansion?

The type of hose involved is the thinnest one on the right in this picture. This hose contains an external rubber layer, a textile reinforcement layer, an inner rubber layer and a nylon lining. The ...
3
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1answer
196 views

Are there any cold-expandable materials of significant expansion factor?

There are thermo-shrinking plastics, commonly used in electronics, which stay shrunk after cooling down. There are thermally expanding foams. The closest to 'expanding when cooled' I know is water, ...
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1answer
581 views

Spatially dependent material property in Abaqus/CAE

I am modelling a plate as 3D deformable solid. My plate has a spatially dependent isotropic thermal expansion coefficient. I have defined this spatial distribution as a Discrete Field in a tabular ...
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1answer
14 views

Temperature vs Material Properties - ABS

I'm working on a design that uses fairly large plastic components (ABS, ~400mm longest dimensions). I'm looking at adding a steel component that encapsulates this plastic part. And, the steel part ...
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3answers
79 views

Temperature of a material in a furnace

I am conducting few trials for checking the placement of a thermocouple on a valve for measuring the temperature of the valve and the material is an X45 alloy. You can see the slot taken on the valve ...
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1answer
355 views

Do bolts become tighter or looser at cryogenic temperature?

In general, will screws tightened at room temperature become tighter or looser at very low temperature (5 K)? On the one hand, the screw should loosen because it will contract radially, while the ...
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1answer
956 views

Why Heat Exchangers are preferred to work in Constant Pressure Process than Constant Volume Process?

Why Heat Exchangers are preferred to work in Constant Pressure Process than Constant Volume Process? Mostly, all problems are solved in Constant Pressure Process
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Relating internal stress of an o-ring due to thermal expansion to amount of free volume in a gland

I am trying to come up with an analytical way to determine the optimal gland size that an elastomer o-ring will sit in. The amount of free space in the gland is determined by the thickness of two ...