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Questions tagged [thermal-expansion]

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34 questions
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1 answer
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I have this assembly of a 304 Stainless rod in the center of a PTFE gasket (about 1/16" thick), and the gasket is sandwiched between 6061 Aluminum plates, with a common bolt hole pattern cut into ...
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1 answer
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I have 1000mm long, 12mm diameter round steel rebar. Both ends are fixed in place. How do I calculate maximum deflection (in the middle point) due to thermal expansion? Please see also this: https://...
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1 answer
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Can I use thermal cycling specs of -40 to 125C for 1000 cycles, 15min dwell time on each extreme for X5R (-55 to 85C) capacitors assembled on this PCB. The PCB will be non-operational throughout the ...
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Can someone explain to an EE how I would go about measuring the thermal properties of a material? I need to measure the thermal impedance, expansion, and conductance (k) of an epoxy, and the ...
Jedi Engineer's user avatar
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2 answers
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I have a 20mm thick and 10m long wall. On one side of this wall (inner) is 80 degree celcius water, the outer side is air at an ambient temp of 20 degrees celcius. My coeff of thermal expansion is 15e-...
jude's user avatar
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1 vote
1 answer
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Can one use thermal expansion to "passively" realign solar panels (whether they are used for photo voltaic production or direct heat production)? BACKGROUND The efficiency of Solar panels ...
J.y B.y's user avatar
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I tried to understand of some formulas in ISA Standard "Flow Equations for Sizing Control Valves": http://integrated.cc/cse/ISA_750101_SPBd.pdf ISA standard likes to give formulas without ...
John's user avatar
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1 answer
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So, I was thinking about trying to build some kind of body cooling suit and started looking into the wonderful world of refrigeration systems. I've managed to get myself side-tracked pretty badly ...
David Nolan's user avatar
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1 answer
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I'm working on a thermal expansion problem out of Beer & Johnston's Mechanics of Materials and I'm a bit confused by the underlying rationale of one of the steps in the solution process. In the ...
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2 answers
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A L-shaped frame $ABC$ (right angle at $B$) consisting of beams $AB$ and $BC$ are fixed at ends $A$ and $C$ to rigid walls. Find the tensile stress at $A$ when the temperature of the frame is raised ...
Iuri's user avatar
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1 answer
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The bar below has length $a$, an uniform cross-section and has both ends fixed to walls. The temperature at the left end is raised by $\Delta T_1$ and that of the right by $\Delta T_2$, where $\Delta ...
Iuri's user avatar
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2 votes
1 answer
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I have a bunch of small rubber rings that I need to conduct testing on. The rings start at about 15mm ID, and need to expand to 65mm and be held there for months. Right now, my solution for expanding ...
Georgije Stanisic's user avatar
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Outer diameter = 256 mm Inner diameter = 230 mm The material is Aluminum Temperature ranges from 23 °C to 200 °C. Solid cylinder formula is, d1=d0(dt*α+1). Where, α = 15.2 ×10-6 /K (approx) How to ...
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4 answers
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Consider a bar which is fixed at one of the ends. I increase the temperature of the bar by $\Delta T$. The sources I'm referring to say that stress developed in the bar will be zero because the bar is ...
Harshit Rajput's user avatar
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Consider a block of dimensions $l, b, h$ kept on a frictionless surface, initially at some uniform temperature $ T_i $. Assume the material to be homogeneous and isotropic. When the block is heated ...
Harshit Rajput's user avatar
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