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  • Users: jedstress
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  1. jedstress

    help on using BS13155:2020 for design a simple lift beam

    Hi all, I am currently working on a lifting beam which has to be designed/analysed in accordance with BS13155:2020. In the past, I have designed lifting beams which were based upon the clients own safety factor requirements and manuals, therefore BS13155 wasnt used as such. The following is...
  2. jedstress

    pretorque required for a friction joint (shear load) when exposed to temperature change

    Hi all, I am currently working on a problem which involves exposing a bolted joint to an increase in temperature (delta 250 C). In the past I have dealt with typical pretorqued bolt joints (ambient temperature) where the required pretorque was approximated by working out the actual required...
  3. jedstress

    Contact body analysis sol101

    Hello, I would appreciate it if someone could give me advice regarding constraint requirements in sol101 contact body analysis. So I have a rectangular plate clamped around its edges. An unconstrained cylinder is pushing down on it using a force card. Contact bodies have been defined. Is that...
  4. jedstress

    loads due to applying torque to the nut of a threaded bar in the middle of a simply supported beam

    Hello, I am currently working on a fixture which is essentially a beam with upward forces being applied at both its ends. The centre of the beam reacts the total load via a threaded bar which is grounded at its base. The previous derivative of the fixture required that the threaded bar be...
  5. jedstress

    units for density in FE nastran

    Hello All, Question 1: I have a general question regarding the units consistency for linear static runs. I have always been told to use consistent units i.e. in my case its typically N, mm, MPa, tonne, tonne/mm^3,mm/s^2. I always stick to these units but could someone tell me if kg (mass)...
  6. jedstress

    nastran units for linear static runs (SOL101)

    Hello All, Question 1: I have a general question regarding the units consistency for linear static runs. I have always been told to use consistent units i.e. in my case its typically N, mm, MPa, tonne, tonne/mm^3,mm/s^2. I always stick to these units but could someone tell me if kg (mass)...
  7. jedstress

    Bending of a pipe slotted within a pipe

    Hello all, I am looking at a setup which includes a simply supported pipe with another pipe of same length slotted inside it.Assuming no friction exists between the two pipes, Am I correct to assume that the two pipe sections do not act as one whole section with a combined second moment of area...
  8. jedstress

    fastener loads in FEM from a modelled lap joint

    Hello all, I created a simple FE model representing a basic lap joint with the two surfaces of equal thickness (represnted by shells) modelled 3mm apart to simulate eccentricity. i have idealised the fasteners as bar elements. however, i cant understand why one end of the bar element(s) is...
  9. jedstress

    modelling fasteners using zero-length bushes

    Hi everyone, I am currently working on a repair job which is as follows: the part being repaired resembles an L shaped bracket which attaches to the parent structure via fasteners. fatigue issues have arisen due to undesirable design features, and therefore straps on both sides of this joint...

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