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Can you use Propylene Carbonate to test for internal stresses on the Polycarbonate plastic parts by dipping the part in Propylene Carbonate and look for cracks?
Yes. It is a very rigorous test. Immerse part for 3 minutes; then wash thoroughly in water. If there are no visible cracks then the part has minimal stress. Poor mouldings will fail quickly eg less than 30 seconds. To remove all stresses in the Polycarbonate part, heat in an oven for 15mins at 130 degrees C. These parts, once cooled, will pass the test. Some Polycarbonate applications need 3minutes resistance; otheres may be acceptable at 1 minutes resistance. It depends on the part eg medical parts or parts that will be exposed to loads or chemicals need better resistance. Alternative tests for Polycarbonate; by volume; these are less rigorous: 15minutes immersion in 1:1 solution of n-proponal and ethyl acetate 3mins immersion in 1:3 solution of toluene and n-propyl alcohol matterbury@ait.ie
What else can I help you with?
Why is annealing done?
Annealing can bring about ductility, soften material and it relieves internal stresses, This will improve the ability to work the metals when they are cold i.e. when bending steel in presses to make metal frames etc
The first thing you want to do when conducting a structural analysis is to?
define the boundary conditions and loads acting on the structure. This sets the foundation for determining the internal forces and stresses within the structure.
How can hot glass be cooled down without risking breakage?
Hot glass can be cooled down without risking breakage by gradually reducing its temperature using a process called annealing. This involves slowly cooling the glass in a controlled environment to relieve internal stresses and prevent cracking.
How is zinc anneal made?
Zinc anneal is typically made by heating zinc-coated steel in a furnace to a specific temperature and then slowly cooling it to relieve internal stresses and improve its ductility. This process helps to soften the metal and reduce brittleness, making it more malleable and formable for further processing.
What will happen if the cooling is rapid?
If the cooling is rapid, it can trap gas bubbles within a material, leading to internal stresses and potential cracking. Rapid cooling can also result in a material not achieving its desired strength or structure, affecting its overall performance and longevity. It may also impact the material's physical properties and make it more brittle.
What is internal equilibrium?
The internal equilibrium is a balance condition between internal forces and the commulative integrated stresses.
How internal stresses introduced in concrete?
Pre stressting, post stressing and loading.
How internal stresses are induced during quenching?
they simply ar. just by thermal and struxtural means
Difference between external and internal forces?
Internal forces are stresses and changes inside the material or body. External forces act independently upon an object.
Why do tree trunks split?
Tree trunks split due to internal stresses caused by factors such as rapid growth, changes in temperature, or physical damage. These stresses can weaken the wood fibers, leading to cracks or splits in the trunk.
Three causes of European expansion?
Three causes of European expansion are; economic causes, internal political stresses, international tensions.
Why is annealing done?
Annealing can bring about ductility, soften material and it relieves internal stresses, This will improve the ability to work the metals when they are cold i.e. when bending steel in presses to make metal frames etc
Why it is necessary to temper hardened steel immediately after quenching?
to avoid the high internal stresses caused by quenching and to get tempered Martensite that is less brittle
Which insulate various internal organs from the stresses of body wall movement and allows organs to move and grow independently of the body wall?
a mantle
Post heating welded metal?
Vague question but I assume you mean annealing or stress-relieving, to remove internal stresses created by the welding heat.
How does the addition of calcium carbonate affect the use of glass pitchers and vases?
Adding calcium carbonate to glass can improve its thermal resistance and increase its durability. This results in glass pitchers and vases being less likely to break or shatter when exposed to temperature changes or physical stresses. However, excessive amounts of calcium carbonate can make the glass opaque or cloudy, affecting its transparency and overall aesthetic appeal.
How do you spell the plural of stress?
The plural of "stress" is "stresses."
