Search results for query: *

@RCCT, Might be out of topic, but can you share what was your road to learn FEA by yourself from beginning to the level you are now. I hold masters of material engineer degree, and I am genuinely interested in FEA, specifically non-linear. So, i think I expect to hear useful strategy from you...

@richardl63 thanks for the answer. But the geometry was created by inventor. An I still get this in some other works which I create the geometry by inventor too.

@271828 a0 = 10µm/s2 is ref. value, than 0dB -> 10µm/s2. In this case, how you calculate the dB ?

Thanks! But it is kind of complex equation to interpret. dB (La) = 20 lg (a/ao) dB re 1 µm/s2. For example what is "re" in the equation above? I get the decibel values at the LHS of equation when I plug the values for a 6 m/s^2 and a0 = 10µm/s2, as 115 dB?

Dear all, I measure the acceleration of the collision of the inner parts as an outcome of the noise vibration, with the sensitive acceleration sensors. How can I convert the acceleration value of 90 m/s^2 to decibel value? Thanks in advance.

Thanks, I do not know the grades for both. Where can I find a source to look for? Actually, it would be good if I can find data to compare EPDM+PP and EPDM ..

Dear friends, I am looking for the service temperatures of the both. I would like to use one of them as a material for heat shield. Can anyone refer me source or where can I look for this information? Thanks.

Dear All, I have been trying to simulate a static-structural problem. Assembly includes some sub-parts and contacts. When I try to get the mesh, I have the strange meshing result in attachments (mesh goes out of the part and reaches to coordinate system center) which yields to failure. What...

@WKTaylor The photo given in the first post was from another extruded rod. I shared that photo because the variation of the grain structure too obvious. we are extruding in T4 temper. I couldn't clarify much what that means actually.

@metengr Yes. They are definitely homogenized.

This one was right after extrusion. But in some other diameter rods, it happens after heat treatment. I see this problem even in the low extrusion ratios,eg 13. I am suspicious about the ram speed. I am going to give it a try.

...grain structure that is expected and demanded grain type. The problem here is that, our customer do not want the equaxial-like grain structure at the quarter radius of the extrusion. Do you have any idea to lose that structure at the quarter diameter of the profile ? *Alloy: 6082...

Is there anyone advice or show guidance for ground mounting solar systems ?

Hi all, The company I am working for, initiates a new project that to produce aluminum frames and construction parts for solar panels. To design its own model we need a structural analysis. In addition as i looked through roughly, we should consider wind&snow loads to compel our solar panel...

@dgallup I see, thank you for the explanation.

@EdStainless Nope, I hadn't checked it. I will. Thanks.

@EdStainless That could be right. But how can i check that if the meter reads m3 or sm3. It writes m3 in the unit of the indicator. @dgallup How did you come up with 1.2/1 ? I couldn't get it exactly.

...or normal cubic meter. Our gas pressure at the exit of the valve is 0.2 bar and the temperature is about 20°C. I use the formulae Vsm3 = Vm3 * (P_working/P_absolute) * T_abs/T_work * (Z_sm3/Z_work) I take the Z compression factor ratio as 1. Hence, V_sm3 = 115 * 0.2/1 * 288/303 * 1...

Could it be the room lightning from the ceiling ? I had a similar issue before, and when I block the light that hits on oculars the effect was cleared. It also looks like wave interference pattern.

I am in doubt of usefullnes of OES method, since I need to look for the elements where they may exist in the material at ppm levels. @Maui They have sent us a ICP OES analysis of the material. But we have to justify the results in more certain way. I don't trust ICP OES method at this level of...