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. G

    Construction Column load bearing calculations

    Are there any websites that might have load bearing calculations for metal square tube columns. Thanks in advance...
  2. ope0409

    Transformer load reading calculation

    I need help to get the percentage current loading on this transformer with the following parameters transformer size is 500KVA Primary voltage is 11KV Secondary voltage is 415v power factor is 0.8 current in Red phase is 315A Current in yellow phase is 302A Current in blue phase is 317A Neutral...
  3. M

    Can a Resistor Simulate a Light Bulb Load for LED Bulb Installation?

    Hello All, I have a snowmobile that uses a shunt type regulator to control voltage. They require a constant load (headlights) to work proper. The 2 stock bulbs are 55 watts on low with the system running 12v. Racers install another set of hand warmers, wired to high, and tape them to the...
  4. FEAnalyst

    Column with eccentric load - can it buckle?

    Hi, this question is rather simple but it makes me confused after several discussions with friends. Can columns supporting some structure and placed on its edges buckle due to weight of the structure ? Here are the particular cases I'm talking about: 1) vertical pressure vessel's legs 2)...
  5. D

    Engineering Finding the reaction force using the unit load method

    I just wrote down what I think and have no idea of it...please help me with this question
  6. D

    Engineering Deflection and deflection angle -Unit Load Method (Cantilever beam)

    Please help to check whether I did it correct, thanks
  7. D

    Engineering Determine deflection and deflection angle using Unit Load Method

    relevant equations: My questions: (1)Not sure whether I did correct especially for the deflection angle (2)The limit taken for calculating defection Yc , I didn't understand why is from 0 to L/2 instead of the sum of 0 to L/2 and 0 to L, how is the limit determined? Kindly advise, thanks
  8. A

    COVID Question on initial viral load and disease progression of Covid-19

    What is the rate of Covid-19 infection compared to the rate of immune response? Faster, slower? Consider two scenarios: Scenario 1: Small initial exposure to Covid-19. Person is briefly exposed to Covid. They perhaps touch infected surface and touch inside of their nose. Scenario 2...
  9. M

    Engineering How to Find the First Buckling Load from the Deflection Equation?

    Hi, I was working through a problem about calculating buckling loads. The problem had the following geometry (I apologise for the poor drawing skills): and the total length is ## L ##. The boundary conditions are therefore: 1. ## y(0) = 0 ## 2. ## y(L) = 0 ## My approach: After taking a cut...
  10. D

    What is the BTU load for a chiller to maintain a water bath temperature of 34 F?

    I have been wracking my head about this one... In other jobs I have sized chillers a few times but this one is a bit different. We have a "Bath" of water, about 400 Gallons The baths beginning temperature is 34 F 5000 lbs of product runs through this bath every hour at a temp of 40 F Roughly...
  11. M

    Noninverting op amp doesn't work on a highly resistive load

    Hi, I am using an Apex PA443DF operational amplifier to drive a sinusoidal signal at 100 V amplitude across a very large resistor with resistance of about 5000 Mega ohms. The amplifiers are set up as noninverting with a gain of 22 and function very well for small resistive loads. The sinusoids...
  12. Polar24

    Can this version of pneumatic piston sustain a certain load on its own?

    Hey guys I am a freshman design student and I have been doing a project in which I am using a pneumatic piston that I designed, I don't have depth knowledge about pneumatics but I tried something. I am using simple concept for this if the cylinder is already pressurized and I am able to join...
  13. P

    How is force applied? Is resistance or load necessary for force to exist?

    I don't know if this is a dumb question, but I just can't seem to wrap my head around it. I can imagine and feel when I'm pressing against a wall, that there's a force. Especially when the wall is not moving, I can continually increase the strength of my push and feel a greater resistance from...
  14. B

    Engineering Calculate shear force and bending moments with a UDL and a point load

    Hello, I am looking for some help. I have completed the question below. I will show my answers. My answer: I believe this to be correct. If it is not would appreciate someone letting me know so i can correct. Now i am attempting this question: Could anyone help, or point me in the...
  15. G

    Acceleration issue -- A 120W motor starts to lift a load of 20 kg....

    Okay, here is a question I just can't solve. The 120W motor starts to lift a load of 20 kg. During which time, this load will reach a speed of 0.5 m / s, taking into account the potential energy. PS: Ignore losses in the mechanism!
  16. N

    How does regenerative braking vary the load?

    Lately, I've been reading about the electronics required for driving motors and naturally that transitioned into braking. I think I have a decent grasp on resistive braking but I do not fully grasp regenerative braking. This plus googling gaps in my knowledge have been my primary sources...
  17. K

    Cantilever beam deflection with point mass and point load at the end

    Hi all, I was looking for help with obtaining deflection at end of a cantilever beam with point load at end as well as point mass at the same location. I believe it would be exactly same. Is this correct? That is, I think just adding point mass at the cantilever's end wouldn't change the...
  18. andyskin

    A 50 kW load operates from a 60 Hz 10 kV rms line with a power factor of 60% lagging -- Determine the capacitance that must be placed in parallel

    Please can you have a look at the file at point me in the right direction if I'm wrong. Thank you
  19. Richtdow

    Gear Load Factor (Reaction Load) Question

    Using the equation to determine shock stroke I input a gear load factor. For the aircraft landing gear that I am designing, I am assuming a gear load factor of 5 which is what is generally used for Navy fighter aircraft. This is because I am designing landing gear for a STOL aircraft and I want...
  20. KavaKovala

    Calculate the clamping force to prevent the load from sliding

    Dear, Could you tell me if the calculations on the attachment are correct? I need to determine the force necessary to prevent the clamp from slipping. Basically the clamp is a part of rubber that I can press against the pipe wall. A load will be attached to this part of rubber. The tube is...
  21. Z

    Load Balancing: Can't understand the summation term

    I can’t understand the term Summation of (j tj). Are we multiplying j and tj. But the text is not talking about multiplying, it says”Total processing time Somebody please guide me. Zulfi.
  22. k2ace

    How Much Weight Can My Angle Bracket Rails Safely Hold?

    I'm trying to make some simple rails for a makeshift server rack. I already have some aluminum angle (6063-T52) that has 2" legs and .125" thick. I have been trying to figure out how much weight could be safely held and can't find anything that makes sense. The weight load is fairly evenly...
  23. W

    Engineering Derivation of the error due to a finite load attached to a potentiometer

    x = fraction of potentiometer connected to load Vp in parrallel with VL = x/(Rp/RL.x.(1-x) + 1) If RL = infinite, then Ro = x and Vo = x.Vs If RL = finite, then Ro = x/(Rp/RL.x.(1-x) + 1) and Vo = x.Vs/(Rp/RL.x.(1-x) + 1) Therefore error is x.Vs - x.Vs/(Rp/RL.x.(1-x) + 1) Trying to break the...
  24. O

    AC Mains Generator -- RPM changes based on load changes

    Hi, Scenario: Given a powerplant is being provided a constant power source - like steam is being produced at a steady rate, so that the generator rotates at a constant speed, and in turn, produces a constant electrical frequency. And, suppose, hypothetically, all the power being used...
  25. Boltzman Oscillation

    Must a load consume the entire available current or only what it needs

    So if I have a source of 5V and 20 amp then the maximum power I can get from the source will be: $$ P_{max} = 5*20 = 100W$$ but my load can only take in 5 watts, it will blow up. But, does this have to happen or does my load only take what current it needs? My guess is that the load takes in...
  26. B

    Finding the value of this load resistor

    Question: I first knew that this would be a series circuit setup, there the current all around the circuit would be the same. It's given that when it's a open circuit, p.d. across the output is 4000V hence the emf is therefore 4000V. When it gets connected to a load resistor, the voltage...
  27. F

    Boundary conditions for a purely inductive load in an AC circuit

    Hi all, Kirchhoff's equation for this simple circuit is equivalent to \dot I=\frac{V}{L} Where V=V_0 \sin(\omega t). Integrating both sides should give I(t) = -\frac{V_0}{L\omega} \cos(\omega t)+c where c is an arbitrary constant (current). Here, most of the derivations I've found simply drop...
  28. B

    Calculating the current through this load resistor

    Hi everyone I have drawn what I think what the setup should look like, and worked out the equivalent resistance of the parallel connected resistors Not so sure where to go next with this problem? Any help would be greatly appreciated!
  29. S

    Correct statement regarding the load vs length graph of a rubber band

    Option (B) is wrong because energy should be received by rubber band when it is being stretched Option (D) is wrong because energy should be released by rubber band when it goes back to natural length The area between graph of stretching and contracting represents energy dissipated in rubber...
  30. R

    Engineering Find the Thevenin Equivalent (Circuit with diode load)

  31. M

    Max load on inclined interlayer of easel

    Hello, I hope I'm in the right topic. I search to know, how many pack the red interlayer on the drawing can support on an easel inclined of 4°. One pack (blue in the drawing) = 2500kg There can be max 20 pack of 2500 kg by side of the easel = 50000 kg One pack measures : 3200x2250x140 mm...
  32. S

    Find the Right Motor for a Vertical Load Torque

    If I'm to choose a motor to suit a vertical load (torque)-see the attached picture for more illustration-. What is the criteria should i follow? After i have done the math for the weight of the object to be rotated, the torque to rotate the load is to be horizontal, and i only have the weight...
  33. bravopipo

    Maximum load capacity of a time dependant Force on the surface of a metal

    Hello; What equations on mechanics can I use or study in order to measure the maximum force in Newtons the surface of the metal Steel box can hold. Details: Watch the image below, we have a metal box made of let's say steel, this box have a shape of rectangle of a thickness of for example 1cm...
  34. C

    Engineering Differential Amplifier with an Active Load

    The highlighted part is what I don't understand. Due to the gate voltage increase in M1, the current in the left branch should increase. That makes sense to me. However, he then says that the voltage at node F (in other words the drain of M1) decreases? How? Look at this plot: As current in...
  35. S

    Electrical Load center terminal screws - where to buy?

    Where can a person buy the small screws that hold the wires into terminals in a SquareD brand load center (breaker box) ? Places sell the screws that hold the panel cover on a a breaker box. They also sell the "lugs" that hold very large wires. However, what I'd like is a package of the...
  36. W

    Engineering Looking at Operational Transconductance Amplifier (OTA) Ibias and load

    My attempt at the OTA is as follows: The simulation circuit is as follows: I've gotten this far largely due the nature of the handout and its hints. I'm struggling with understanding ibias From my understanding, there is a current mirror at the top of the OTA. This creates an infinite input...
  37. L

    Need a Hand Calculating the Maximum Load on a Structure

    Basically looking to find out what the maximum amount of load you could put on the center of a structure like this would be, in theory. Top Beam: The top "Beam" of the assembly in the drawing is 3"x 3"x 3/8" square tubing, 112.5" long Supporting Beams: The beams supporting each end of the Top...
  38. V

    Calculating the normal force due to moment load on a thrust bearing

    Hello all! I have a mathematical question for you. I'm trying to design a thrust bearing that can withstand axial and moment loads. I've added a picture of a similar design. The design consists of two rings (grey) and sliding pads (blue) fixed on the bottom ring. The top ring slides over the...
  39. N

    Transistor Load line doesn't intersect characteristic curves....

    Hello, I've carried out an experiment to plot the characteristic curves (Ic vs Vce) for a BC108 transistor and then attempted to find where the load-line intersects those curves. Below are my results: ...as you can see, the load-line doesn't intersect the characteristic curves at all...
  40. dasunx

    Pulsated DC Chopper with Inductive load

    Circuit Diagram Components USED 1. MOSFET ( 47N60C3 ) (https://www.infineon.com/dgdl/Infin...n.pdf?fileId=db3a304412b407950112b42dff93492f) 2. Primary Transformer Coil 3.12V. 2A Switching Power Supply 4.function generator ( currently using 66kHz frequency) 5.oscilloscope 6. Schottky Diode (...
  41. E

    Having difficulty increasing my load power factor above 0.95

    I have an inductive load (120 volts AC at 0.5 amps AC at 60 Hz, 0.9 power factor before correction) that is a connected to the grid. I have been trying to increase the power factor above 0.95, but no matter how much I tune the power factor correction capacitors I cannot increase the power factor...
  42. Prialen

    How to choose the right power screw dimensions given the maximum load

    Hi, So I have a uni project and were required to design a jockey wheel and corresponding power screw. We're given a maximum load and have to do the relevant calculations, moment of torque, efficiency etc. My question is I don't understand how to take the given maximum load and find the relevant...
  43. G

    Controlling an electronic load across two ground domains

    Please refer to the simplified circuit in the attached figure. The overall goal is to control the current through sense resistor R1 by adjusting a reference voltage V2, thus creating an electronic load where the power is dissipated in Q1. All load current is returned locally in the isolated loop...
  44. Zack K

    Courses Will I be able to manage this course load?

    So this is what my course load is going to look like for my fall of second year as a physics major. math 251= Calculus 3 phys 211= Intermediate mechanics phys 201= just some weekly seminar that "expose students majoring in any Physics program to opportunities available with a physics degree "...
  45. kardai

    Work related problem: Yield strength as well as max load

    Summary: Yield Strength value as well as maximum load capacity. Need equations and possibly a break down on how to solve the issue. So let's say I have a Wooden Street pole and I want to mount a steel bracket using metal bands to the street pole. The bracket will be mounted to the beam using 4...
  46. S

    Fixed-End Beam with Center Static Load

    The bracket shown in figure 1 is applied to both ends of a beam (figure 2) which experiences a single static load at its center. The bottom of both brackets are fixed by some method, so it can't deflect. According to Solidworks, the bracket survives with flying colors, but it bothers me that I...
  47. Chandrakanth_balusa

    How does the pressure in a steam header react to a sudden load change?

    Hello People, I have querry regarding the pressure variation in the steam header in the steam power plant. if there is a sudden change in the load and the mass flow through the turbine has to be increased, i would like to know how it effects the pressure value? if yes how does this change...
  48. T

    Maximum pull-off load, axial load and radial load of two strapped pipes

    Imagine the following scenario. A pipe is strapped to a larger "host" pipe using a steel strap and a spacer block as shown in the image below. If anyone could have a look at my calculations to confirm they are correct that would be brilliant! Variables Assuming the following general values I...
  49. WrathofAtlantis

    Single Propeller load asymmetry in turns?

    Single Propeller load asymmetry in turns Does this have a formula, and what is the current Flight Physics consensus of the effect of this on turns? G.
  50. H

    How far will the middle point of the beam sag under load?

    I tried to use F/S = E.ε to find the new length after deformation and than use pytagoras theorem in right angled triangle to find how much did the middle point lower. But it was said to me that my method is wrong and that there exists some formula to solve it. Can you please tell me where could...
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