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.

View More On Wikipedia.org
Recent contents Top users
  1. E

    Moment of a Distributed Load on Beam, Scanned work and Diagram.

    Homework Statement Determine the forces of reaction.Homework Equations SUM of Y forces=0 SUM OF FORCES ABOUT POINT B = 0 The Attempt at a Solution My attempt is in the link, I scanned the diagram along with my work. Thanks for the feedback, appreciated. http://imgur.com/i3cB2 <----- Link
  2. GreenAce92

    Define what is meant by Load Impedance?

    OK. I hope this question is acceptable here. I am studying to take my Ham Radio License Technician's Class exam and I am not sure about the topic of load impedance and load in general. I looked up "Load impedance" on wikipedia, I'm confused This sentence "when a high power appliance...
  3. D

    Courses Avg course load while doing research

    For those of you who have done undergraduate research at your home institution during the fall or spring semester, what was your average number of credits taken during that (or those) semester(s). I had read somewhere that the time commitment for undergrads was generally 10-20 hrs, depending on...
  4. G

    Courses Questions About Taking 12 Hours of Math Courses Next Semester

    Next semester I am looking at taking 12 hours of math intensive courses, would it be wise to stay with just the 12 hours, or would it still be possible to take another Gen-Ed or humanities course? The courses are: Calc 3 Linear algebra Chem 2 Calc based Physics for science majors.
  5. H

    Designing Load Homework Statement: 25 W @ 0.88 PF, 120 V

    Homework Statement Design a load which draws an average power of 25 W at a leading PF of 0.88, with Vrms = 120 V @ 60 Hz. Homework Equations P = VIcos(\theta-\phi) Q = VIsin(\theta-\phi) S = P + jQ |S| = VI The Attempt at a Solution Since it has a leading PF, the load should be...
  6. S

    [FEM-problem] Defining max. allowable load

    Hello to all! I have this one and only obligatory FEM-course and tbh I'm having some hard time with it, so I'm hoping that someone can help me out with this assignment. Homework Statement Define maximum allowed distributed load p when the own weight of the frame is taken into account. (Own...
  7. K

    Can a Peltier Work Against 315 Watts Heat Load? Graphs Inside!

    I'm planning to work on a water cooling device for physiotherapy using a peltier. For this, I should be able to cool 500 g of water at a temperature of 35°C to 18° C. This gives me a heat load of 315 Watts if I take time to be 3 mins. Is it possible for a peltier to work against such a...
  8. L

    Inrush current limiting for inductive load

    I am using an isolation transformer in a VFD circuit to prevent a GFCI from tripping (due to harmonic noise getting back on the line.) This solved my GFCI problem, but brought about another issue due to the inrush current the transformer created on this circuit. Due to UL requirements, i...
  9. E

    Thevenin circuit Max power across Load resistor

    Homework Statement One Thevenin theorem result is that the maximum power across the load resistor in the equivalent circuit (and therefore the real circuit) occurs when RL = Rth. Start with the result that the power dissipated by the load resistor is I2RL and prove this result. Homework...
  10. N

    Find load weight of the truck

    Homework Statement The indicated location of the center of gravity of the 3160-lb pickup truck is for the unladen condition. If a load whose center of gravity is x = 21 in. behind the rear axle is added to the truck, determine the load weight WL for which the normal forces under the front and...
  11. M

    Using Voltage Regulation to find load capacitance (Transformer)

    Hi, I did an experiment, involving transformers. Where we did open circuit and short circuit tests then test with a resistor, capacitor and inductor. For the last question it asks Calculate the load capacitance and inductance from the voltage regulation readings. Voltage regulation...
  12. L

    Solid Mechanics- Ultimate Load in truss.

    Homework Statement A 3/4-in.-diameter rod made of the same material as rods AC and AD in the truss shown was tested to failure and an ultimate load of 29 kips was recorded. Using a factor of safety of 3.0, determine the required diameter (a) of rod AC, (b) of rod AD. Homework Equations...
  13. A

    Frequency Vs Max Load current (Motor)

    Have a 15 HP motor whose full load current (@ 50 Hz - India norms) is calculated at around 21 Amps. Have added a VFD (Variable Frequency drive) and would like to always run the machine @ 90% of full load current for maximum efficiency. Can anyone assist in helping me calculating full load...
  14. L

    DC Motor failed to run on load

    Hello, Im using DC motor to run the conveyor but suddenly the armature shows high current 130 A for 30 V power and the speed can't increase anymore. The motor power stated in the name plate is 93.8 KW, Armature voltage is 453 V and Armature ampere is 225 A. The motor can run free load after...
  15. S

    Can 16 Credit Hours with a Lab Overwhelm a Math Major?

    Is this too much of a load?? I'm thinking of taking 5 classes this Fall semester: Real Analysis 1 Economic Statistics Applied Regression Analysis Computer Science 1 with lab Marketing Principles and Policies Total would be 16 credit hours (CIS is 4 credits). I'm a math major with a minor in...
  16. P

    Finding maximum possible load in an item

    How is the following question done? Homework Statement An offset link is connected to 2 cables like shown in the image attached. The offset link has a width 'w', of 200mm (or 0.2m) and a thickness of 35mm (or 0.035m). It has an allowable normal stress of 74 MPa. What is the maximum...
  17. D

    Does an 80W Load Significantly Slow Down a 100W Generator?

    I know that in general generators under-load will eventually slow down because of the load... Question is... When I have a small generator that produces 100W and a load that is 80 W and mechanical Input rated in (W) about 110W. Due to losses the generator can only generate 100W of electricity...
  18. R

    Low load factor and Voltage drops

    My lecturer, in the notes he provided to us mentioned that low load factor of a distribution transformer results in higher system losses and voltage drops. I thought the by higher system losses he means the iron losses in transformer which is comparably higher in no-load and lower load...
  19. G

    Calculating Cooling Load for Water Tank on Building Roof?

    Hello everybody, I have been here before, with different username and cause i didn't log into long time ago, the username doesn't work for m now, so here i am with the new user. Just as a respect for the forum rules, to not post a topic once i register. i am doing cooling load...
  20. B

    Lever with spread load: formula

    Hi Guys, How much force will I need to lift 5000 kg block and how much force will be acting on the pivot point? I know how to calculate a normal lever but couldn't find any formula for lever with load evenly spread as per the attached diagram. see the attached diagram Thanks
  21. W

    Can a transformer operate until maximum load?

    Hi, I have one 2500KVA transformer with 11kV/433V. The maximum current at low voltage side for this transformer provided by producer is up to 3333.49A. Currently, this transformer is running with 2700A which is about 80% of transformer usage and the temperature of the transformer has reached to...
  22. J

    Same load one or three batteries

    I am drawing 12 volts at 1/2 amp for 6 hours a day off of one 12 volt car battery battery which is powered by a 2 amp solar charger voltage goes to almost 14 volts when charging I then added two more car batteries voltage is under 13 volts when charging with the same load is it better to use...
  23. S

    Shock load due to high pressure gas flowing into container

    Hello, I am new here so I apologize in advance if my question is not formatted as it should. I have an application where a large pressurized vessel is releasing part of its contents (gaseous) into an "empty" container (air), much smaller, that is at atmospheric pressure. I need to know if the...
  24. T

    Detecting triac failure whether under load or not

    [First post here, please make allowances..] I want to use a triac as a solid-state SPST switch for a normal 120VAC receptacle. The on/off state will be controlled by a low-voltage DC circuit through an opto-isolation MOC3020. http://ken.coar.org/images/opto-triac.png So far so good...
  25. P

    Decreasing Thrust Load by Lubrication

    I was told that lubricating the interface of a thrust roller and kiln tire with graphite would reduce the thrust load since the source of the load in the traction. I need some help understanding this concept. Thanks.
  26. M

    Bushing(Plain Bearings) load calculations

    I have no idea how to calculate the bushing load which is stated in catalogues in unit N/mm^2 and KgF/cm^2. Anyone knows how?
  27. S

    Load Calculation Safely Supported

    Homework Statement A mild steel column has a cross section of 100mm by 50mm. Assuming a safety factor of 6 calculate the load that it can safely support. Homework Equations Column material: mild steel Column cross section: 100mm x 50mm Safety factor: 6 On the basis that the...
  28. S

    Calculate Dead Load of Beam w/ Solid Square Cross Section

    Homework Statement A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam. Homework Equations Solid square cross section of beam: 100mm Material...
  29. A

    Help with this problem - finding power transfer to R load

    help with this problem -- finding power transfer to R load :) http://img99.imageshack.us/img99/610/08072012060.jpg i want help with finding Vth and finding power transfer to R load thanks all
  30. N

    Buckling load equation for buckling struts

    I was trying to solve a question where they told me to find the buckling load of a wing strut in a plane that experiences a compressive load along its axis. The strut can be considered to be a pin-jointed at both ends. Dimensions of the strut is as follows: outside diameter is 150 mm and...
  31. J

    Calculate Load of Mild Steel Column

    Homework Statement A mild steel column has a cross section of 100m by 50mm. Assuming a safety factor of 6 calculate the load that it can safely support Homework Equations W=A*δ The Attempt at a Solution δ=470 N/mm2*0,1667= 78,34 mm2 A=100mm*50mm=5000mm2 W =5000*...
  32. J

    Calculate the Dead Load on a Simply Supported Beam

    Homework Statement A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam. Homework Equations Dead Load= volume * weight of material The...
  33. U

    Optimizing Load Resistance for Class E DC-DC Converters

    Hi Every One, I am working on the Class E DC-DC converters. My circuit is working good for full load (RL-load resistor) and also giving the 90% of efficiency. But, the problem is that how to maintained the output voltage is constant by changing the load resistance from full load to no load...
  34. L

    How to calculate roller/wheel maximum load?

    Dear all, I would like to know how to calculate the maximum load that a roller/wheel can stand under set conditions. The roller/wheel works in a sliding door and it rolls along a stainless steel rail. I think I have to use contact stresses equations and so on but after reading several...
  35. S

    Phasor Diagram of No Load Ideal Transformer

    For a no load ideal transformer V1 is anti phase with E1? or in phase like this?
  36. P

    Courses Care to comment on the sensibleness of my course load?

    I'm coming into a university this fall as a junior after completing ALL of my general education requirements, which puts me in somewhat of an odd position. I literally have no courses left to take except for ones in physics and math, so that's definitely a plus. However, I haven't been able to...
  37. S

    Load bearing of 2 alluminum square tubing

    load bearing of 2" alluminum square tubing im trying to build a load bearing beam out of 2" alluminum tubing 1/8 in walls can anyone tell me the weight a length 8feet long could bear befor bending its aa6061 T6 what would it hold befor bending? keep in mind math is not my cup of tea lol
  38. M

    Thickness of material to support a heavy load

    My situation is i have a 10kg battery that is mounted on top of a plastic material. How would i exactly calculate the right thickness for the plastic to support the 10kg battery?
  39. R

    Wheel acceleration in relation to vertical LOAD and current speed

    Hello everybody! I'm trying to write a car simulation but I'm having problems with precisely calculating the acceleration / velocity of the car's wheel. Currently the simulation works as if the Car was lifted in the air, so there is no load (vertical force) on the Wheel. What I have so far...
  40. M

    Voltage across a load resistor in a Voltage Divider Circuit

    Homework Statement Show that V across Resistor Rkohms is: (11R) / (3.96 + 4R) V The circuit is a 5V cell in series with a 1.8k resistor. Following the 1.8k resistor are a 2.2k and Rk resistor in parallel with each other. The wires then rejoin and return to the cell.Current through the circuit...
  41. S

    What is the Load rating of Aluminum rectangle tubing?

    Greetings, I will describe the problem and my proposed solution which leads me to the load bearing question.. Problem: Pickup camper cabover floor is compromised where it attaches to the driver side sidewall, i.e., separation of floor from sidewall due to some dryrot and a blowout doing...
  42. S

    Braced column under compressive load

    Homework Statement Homework Equations P = EI pi^2 / Leff radius of gyration: SQRT (I/A), slenderness ratio: Leff/r The Attempt at a Solution So I've found Ixx = 240.81 x 10^6 mm^4, Iyy = 71.9 x 10^6 A = 9600 finding the radiuses of gyration rx = 158.38, ry = 86.54 effective length of...
  43. M

    Total pressure load on a chain

    Scenario- I'm riding a bike up a mountain road, at a constant speed of 5 mph, at a constant grade of 11%. The bike plus me (and all gear) weighs in at 200 pounds. Based on this (and excluding frictional losses, wind, etc.) how much TOTAL pressure, in pounds is on the chain? Would it be...
  44. M

    Trying to determine actual load (PSI) on a drive chain

    I think I have a rough idea how to get there...but I'm not sure. Let's assume I'm riding a bicycle, and I'm peddling at a constant pressure (torque). This is a peddling pressure which would be the exact amount which would just lift a 50 pound weight off the ground and hold it there...
  45. B

    Calculating the dead load of a beam

    Hi there, electrician in need of some mechanical study help. The question I have is, A beam has a solid cross sectional area of 100mm and is simply supported by 2 supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam. The only...
  46. I

    Balanced load at home means no current on the neutral?

    I've never read this explicitly, but here is what I've concluded: If you could somehow have a perfectly balanced load on the circuits in your home to each of the 2 hot lines coming into your residence from the pole mounted transformer, this would mean: The neutral wire connected from your...
  47. N

    Practical benefits of maximising power delivered to a load.

    So I have a question that I have to answer that goes like: 1) Give some examples of practical situations where it is desirable to maximize the power delivered to the load. This is in reference to A.C Power analysis and understanding maximum power output is achieved when the the Thevenin...
  48. cepheid

    Dead Car Battery Load when car off

    My car has a problem that there is some sort of load on the battery even when the engine is off. So the battery slowly drains with time. If left for more than a couple of weeks, the battery will be too drained to start the car. I had this happen to me, and so I bought a mobile booster pack...
  49. M

    Upward forces applied to load cell in mobile application.

    My current project is as follows: Designing a system that will be mounted to a truck that will be traveling down the equivalent of a dirt road. Part of the system is an ingredient bin that is rigidly mounted to load cells. The loads cells are a cantileaverd beam type. The primary...
  50. R

    Calculating maximum load on a thread

    Can anyone offer a method or location of a method for determining the permissible axial load that can be applied to an internal thread? i.e. Take a nut and screw into it two bolts, one from either end so they meet in the middle of the nut, then apply a tension force across the two bolts. How...
Back
Top