Recent content by Mateus_R

Hi everyone, I had the opportunity to see a tool that will be used offshore and some of the mechanisms were pneumatic actuated by pneumatic motors. The designer choose to connect the pneumatic motors /valves / lubrifil using rigid pipes and fittings (thread connected). I'd like to know if...

@rb1957, the question from my first post was answered by @ProgrammingPE, with the assumption of thin pipes. The remaining discussion comes from the article provided by @1503-44 that was followed by my 2nd post with the general relation between Stress-Stain for a cylinder. Hope it is clear now.

@rb1987, yes, the situations are different (PV with closed or open ends) and that's why the etheta changes: 1st post) a pressure vessel with open ends, considering no axial stress. 2nd post) a pressure vessel with closed ends, taking into account also axial stress contribution. In any case...

rb1957, I'm not sure if I get you point, but the relation between hoop strain and pressure, considering the contribution of axial stress is given by: from the link provided by 1503-44. In this case seems that they are considering a plane stress state and later on calculating the radial...

Thank you @1503-44 From the paper, I understood that the strain equation I mentioned it is just math manipulation. I still don't understood why to use this equation, once I could apply directly the poisson definition and get it directly, since the circumferential strain and the radial one are...

Hello everyone, I'm analyzing how to measure the strains and obtain the stresses at a pipe using a strain gage (measuring circumferential and longitudinal strain with a rosette), and I was informed that the relation between radial strain and the other two components is the following one...

Hello, Is there any issue/concern feeding the hydraulic actuator considering an elbow connection instead of a straight connection? Thank you for your help. Kind Regards,

Thank you gtaw for your comment! Best regards. Mateus

Hello, I'm not a welding specialist and for a PQR with base metal Al 6061 T6 (plate), I have a question about the AWS D1.2 requirement for tensile test. Table 3-2 presents as minimum tensile strength 24 ksi, but the Al6061 T6 ruled by ASTM B209 defines as min. Yield Strength 35ksi and Tensile...

Hello, I'm not familiar with the standards that rules the design of equipment to be used in a ship/platform and I would like to know how to combine the accelerations (normal, longitudinal, transversal) when calculating a structure to be used on an offshore asset. I imagine that from an...

Yes, I'm aware of this problem. The point here is to understand which approach could be better --> cables as springs x Remote Points. Once I understand this, I can perform the analysis considering 2 cables or changing the axial stiffness of one diagonal cable to obtain a higher/lower force at...

I already try to hide the elements, but it doesn't change the overall result of the analysis. If the cable deforms 10mm and the structure 1mm, in the Total Deformation Plot, the max. deformation will be 10mm, hiding or not the cables/springs.

Hi everyone. To perform a lifting analysis of an equipment using Ansys Mechanical, I know two different approaches and I would like your opinion about them: 1) I simulate the cables that will lift the structure as spring elements (body-reference), including the axial stiffness of the designed...

Thank you all for your answers. They were very helpful. Btw, the system I mentioned was a lube oil system.

Hello, I'm studying some topics in Fluid Power and I found on internet a recommendation to not install a suction strainer in the reservoir, on the suction line of the pump. This recommendation comes from the high pressure losses from the strainer, which could lead to cavitation problems in the...