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  • Users: Mateus_R
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  1. Mateus_R

    Pneumatic project - construction options

    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...
  2. Mateus_R

    Strain relation in a cylinder - strain gages

    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...
  3. Mateus_R

    hydraulic actuator - inlet/outlet with straight connection or elbow connection

    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,
  4. Mateus_R

    Aluminium 6061 - Performance Qualification Record - AWS D1.2 - Table 3.2

    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...
  5. Mateus_R

    Ship Accelerations - Load Combination

    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...
  6. Mateus_R

    Lifting analysis with Ansys Mechanical

    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...
  7. Mateus_R

    Suction Strainer x Cavitation

    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...
  8. Mateus_R

    Ratchet and Pawl reference standard

    Hello everyone, Is there a standard to design Ratchet and Pawl mechanism? Unlike for gears, I can't find any reference to follow. Any idea? Thank you in advance
  9. Mateus_R

    Bolt Analysis with results coming from ANSYS

    Hello everyone, For a project I'm working, I have two flanges connected by bolts and I modeled the bolts as beam elements in ansys. When I get the results from these beam elements, Ansys provided me 3 Forces and 3 Moments. In this case, is it correct to transfer the bending moments coming from...
  10. Mateus_R

    Geometric Tolerances - reference values for different mechanical process

    Dear colleagues, I would like to understand if there are some reference values for the definition of geometric tolerances depending of the manufacturing process, just some guide values to not ask for suppliers something not feasible, for example if is reasonable to consider decimals or...
  11. Mateus_R

    Buckling Load

    Dear all, I have to evaluate the effect of the buckling in a bar, and some questions arise, specially regarding the ANSYS Mechanical interpretation: Suppose I evaluate buckling according to image attached, case 1 -> Ansys will give me the critical buckling load related to the applied load, by...
  12. Mateus_R

    Buckling Load

    Dear all, I have to evaluate the effect of the buckling in a bar, and some questions arise, specially regarding the ANSYS Mechanical interpretation: Suppose I evaluate buckling according to image attached, case 1 -> Ansys will give me the critical buckling load related to the applied load, by...
  13. Mateus_R

    Shear Stress Checking

    Hello everyone, Following the discussion: Link, if I would like to evaluate the shear stress at the base of the plate, what safety factor should I select to compute the allowable shear stress? The AISC 360-16, G.1 (Design of Members for Shear) , recommends Yield Strength / 1.67 (Equivalent to...
  14. Mateus_R

    Structure Frame with Machined Components - how to guarantee tolerances?

    Hi everyone, I have a question about how to construct a structure frame that has attached several machined components that has some tolerances to respect (For example: attached in the structure there is 4 supports to connect other component using pins, and the hole where the pins are going to...
  15. Mateus_R

    Joint Revolute Connection - Error

    Dear all, I'm preparing a static analysis (beam 1-D) and I'm facing a problem when I'm considering a revolute joint between two bodies. My study consists of a beam structure where the center beam is connected by a pin joint in each side with a Main Structure. I'm showing just a lateral side...
  16. Mateus_R

    MDMT x MDT x Impact Test

    Dear all, For a project in Russia, I'm facing the following situation: The scope of supply include this information in the section Design/Ambient Condition: - Minimum design metal temperature: -44°C - Minimum ambient temperature: -53°C What I didn't understand is why the customer...
  17. Mateus_R

    Can I certify a SS316 in compliance with NACE MR0103?

    Dear all, For a project that i'm participating, it is required to the pressure vessel to be NACE Certified MR0103. The vessel is completely in SS 316. For the plates we could find the material already certified, on the other hand, for the drain pipe (1") and flanges we couldn't find it...
  18. Mateus_R

    Welding Book - PQR Doubt - Material P1 G1 covers P1 G2 ?

    Dear all, For a project that I'm following, I have a doubt regarding the PQR sent by our supplier. We have to weld a plate in P355GH (P-No 1, Group 2) to another plate A240 304 (P-no 8, Group 1). Our supplier sent us a PQR with joint material A516 gr.60 (P-no 1, Group 1) to A240 304 (P-no 8...
  19. Mateus_R

    Design for Full Rating condition

    Dear All, Could some one clarify me what the meaning of having a design (Temperature/Pressure) of a valve/pipe according to the full rating condition? Another point that I saw in one datasheet and is confusing me: For a piping class, the customer inform: Temperature/Pressure Limits: FULL...
  20. Mateus_R

    Vent Pipe PSV - should be calculated according ASME/other standard?

    Hi everyone, I would like your help to understand a situation regarding the vent pipes we install after a PSV. I heard from someone that also that kind of pipe should be evaluated according to ASME Section VIII, div1. Since they are open to atmosphere, what's the reason to consider a pressure...

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