What is Load: Definition and 1000 Discussions

A structural load or structural action is a force, deformation, or acceleration applied to structural elements. A load causes stress, deformation, and displacement in a structure. Structural analysis, a discipline in engineering, analyzes the effects loads on structures and structural elements. Excess load may cause structural failure, so this should be considered and controlled during the design of a structure. Particular mechanical structures—such as aircraft, satellites, rockets, space stations, ships, and submarines—are subject to their own particular structural loads and actions. Engineers often evaluate structural loads based upon published regulations, contracts, or specifications. Accepted technical standards are used for acceptance testing and inspection.

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  1. S

    Designing a Strain Gauge Load Cell: Q&A on Force Measurement

    Hello, I'm trying to design a strain gauge load cell for force measurments. I have few questions regarding that. Q1: how to calculate the minimum froce that my load cell can detect? Q2: how to calculate the FSO(full scale output) of my load cell? Q3: Is there any way to measure the...
  2. theOrange

    Load carrying expansion joints

    Are there any expansion joints (for example between two beams) which can carry a shear force?
  3. R

    Compressor aftercooler power load

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  4. J

    Balanced Three Phase Load System

    Homework Statement f = 60 Hz pf = 0.8 (lagging) Homework Equations Z(L) = 2 (pi) * f * L Given z = x + iy tan(angle) = y/x pf = cos(angle) The Attempt at a Solution I changed the Wye-connected resistors to an equivalent Delta-connected resistors: The new resistors become 3R in the...
  5. medeek

    Wind Load Calculator: Gable Roof Envelope Procedure

    I've recently started working on a wind load calculator. Notice the complexity when overhangs are added to the roof. These load diagrams show the Envelope Procedure for a Gable Roof: Load Case A: Load Case B: If torsional load cases are required then another Load Case A and B...
  6. C

    Hot Air Balloon: Find inside temperature given size, load

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  7. W

    What Are Inertia Loads and How Do They Affect Aircraft Structures?

    I'm reading an old engineering book about aircraft Structures from the 1950s and I don't recognize the term inertia load. Can anyone give me a definition of it? I'm going to take a guess based on what i do know. Inertia is a body's resistance to change in speed and direction. So when some...
  8. A

    Power Plant Load Spike: Get Advice Now

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  9. EverGreen1231

    Looking for articles/books about Load Flow Analysis

    With work I have not had much time to research this much myself. I was wondering if anyone could give me a link for an article or book that details the process and why's of this calculation; maybe also a short explanation. Thank you in advance, -Tyler.
  10. O

    How Much Torque is Needed to Lift a 1000 lb Load with a Power Screw?

    Homework Statement A power screw with a pitch of 1 mm is directly coupled to a stepper motor rotating at 60 rpm. If the efficiency of the power screw is 35%, what is the stepper motor torque required to raise a 4450 N (1000 lb) load? Homework Equations P=τ*ω τ=F*r The Attempt at...
  11. O

    No load voltage / resistance question

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  12. P

    Optimizing Motor Load Power Calculations for Load Flow Analysis

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  13. A

    Stainless steel tube weight load

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  14. S

    Cantilever statically indeterminate beam with point load

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  15. ranju

    Drawing the DC Load Line: Exploring Saturation and Cutoff Points

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  16. arpansen

    Full load condition of real transformer

    What is the full load condition of a transformer. Then in reference to the equation: Vp = aVs + Req*Ip + jXeq*Ip (the very common complex equation of a simple equivalent circuit ) Should I use Vs= 230 V or Vp = 2300 V in full load load condition or will the magnitude of the primary voltage be...
  17. K

    Gas Turbine: Full Load/Part Load Understanding

    Hi all, I am not able to physically understand the term "load" when we refer to Single Shaft Gas Turbine engines used for power generation purposes. What is causing the torque on the Gas Turbine (GT) to change? Again how the speed is maintained constant while the torque is varied? For a single...
  18. C

    Solving a Lever System: Lever Arm and Load Lengths

    Forgive me if this is in the wrong category. I have a product I am working out - I am a programmer and electronic engineer by trade, which didn't include a lot of work with physics principles. I have a lever system which seems simple - but the trick is, my load is acting as a lever too...
  19. B

    Deflection of fixed beam with point load at center

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  20. F

    Strain Gauge Load Cell Questions

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  21. B

    Allowable Uniform load on steel channel

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  22. J

    Stress in a plate under tensile load

    Hello everyone ! Homework Statement In an isotropic aluminum plate (L = 200 mm, b = 50 mm, t = 1 mm), an additionally aluminum plate (l = 50mm, b = 50mm, tV = 0.5 mm) is glued in the center area. The plate is loaded in the y-direction with a normal force of Ny = 10000 N. Calculate the...
  23. B

    Max Load for 12ft Steel Ladder on 65 Deg Angle

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  24. H

    Should I take a humanities course or a physics course for my fifth class?

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  25. E

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  26. ranju

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  27. P

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  28. T

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  29. B

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  30. B

    How to determine the max load capcity of a steel square tube

    A square tube beam, 4in x 4in x .1875in thick. Length= 36in Cross sectional Area= 2.859in^2 A36 steel How do you determine its max load capacity?
  31. R

    Fixed Pipe Uniform Load Support

    Hello, I am working on a project to be able to support a spray bar assembly with a pipe with a specific diameter. The spray arms, fully extended, sit at 45 deg on hydraulics. To perform maintenance, these hydraulics must be turned off, so a way to support this is needed. The support pipe 103"...
  32. S

    What are the considerations for live load ratings in structural design?

    So I'm looking at some technical drawings here (mechanical engineering co-op) and the live load rating is 100 pounds per square foot (PSF) for this particular drawing. My question is this: why is it so low? Just me standing with my feet together exerts roughly 230 pounds per square foot (i'm...
  33. J

    Maximum Load on a Plastic Sheet

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  34. B

    Cyclic symmetry - harmonic load components

    I have a homework problem where I have to solve for the displacements of the attached system using cyclic symmetry. To do this, I know that I have to find the harmonic load components of the system. One thing that my professor did not make clear (or if he did, I missed it) is how to determine...
  35. T

    Calculating Three Phase Power Load: Help & Homework Statement

    Homework Statement I have an exam coming up and one of the practice questions is as follows A 415V 50Hz three phase supply energises a balanced star-connected load through a three phase feeder with a per-phase series impedance of Zline = ( 0.165 + j0.413 ). A power meter at the source end of...
  36. M

    350W PMA: Looking for a Variable Load Solution

    Hi, I'm currently working on my end of the year project for my studies. I have a DC motor mechanically linked to a wind turbine PMA. My aim is to control the speed of this motor (using PWM) to simulate different types of winds. My problem lies on the generator side. I need a load to...
  37. dwn

    How Is Average Power Calculated in a Transformer Circuit?

    Homework Statement Please see the image attached. We are asked to find the average power (P) delivered to ZL. 2. Relevant Questions (My observation of the circuit) The circuit on the left is as follows: V + I1*(5 + jwL) = 0. For the circuit on the right: V = I2*(Z + jωL) Is a=...
  38. S

    Steering axis inclination - load on king pin post bushing

    I would be grateful for any assistance I'm attempting to calculate the load on the bushing in the kingpin post on this steering axle. I've uploaded a pdf of the assembly. The load would be perpendicular to the kingpin center line at the top and bottom of the bushing. I'm not certain how...
  39. M

    What is the relationship between current and voltage in an inductive load?

    Homework Statement An ideal inductor L = 88 mH is connected to a source whose peak potential difference is 65 V. If the frequency is 90 Hz, what is the current at 5 ms? Homework Equations il= Il(ωt-ø) and Il = Vl / Xl The Attempt at a Solution So I did get the answer...
  40. A

    Load Voltage Problem - Find the Fault!

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  41. R

    Sychronous Pernament Magnet Alternator under Load

    Hi I have a question about a Synchronous Permanent Magnet Alternator (Small Wind Turbine Alternator) I want to understand the ratio between RPM and the Voltage from the Alternator. I can't find any equation for that ratio , and I read somewhere on the web , that if I have a load ,than the...
  42. B

    Maximum tensile stress on rod with eccentric rotating tensile load

    I was solving this paper, but got stuck on this question, and it's been bugging me endlessly. I don't know what I'm missing. Here's the question: A rod of 20 dia is fixed to the ceiling of a roof on one end. A rotor of 50 kg mass is attached to the free end with bearings. The CG of the rotor...
  43. T

    Do transformers in chargers act as a load?

    Due to the fact that I don't have any plans on damaging my chargers (something I am not planning to risk at the moment) I have not been able to confirm whether the transformers in chargers act as a load when nothing is charging. From what I have read, based on the design of many chargers, even...
  44. P

    Can a Thin Walled Brass Bushing Handle High Shock Loads at Low Angular Velocity?

    I'm looking for a (needle?) bearing that can sustain shock loads of up to 2.5e5 N, at low angular velocity, but its outer diameter can't be greater than 30mm. as ridiculous as it sounds, any suggestions?
  45. T

    Maximum allowable length for a column under a load (buckling question)

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  46. Z

    Maximum average power for a purely resistive load

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  47. S

    What is the Maximum Torque Transmission Capability of a Cone Clutch?

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  48. A

    Can a shear force diagram be a function of applied load P?

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  49. T

    Telephone Wire with Load and Characteristic Impedance

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  50. Saladsamurai

    Large Diameter Interference Fit: Removal Load

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