Questions tagged [structural-analysis]

Structural analysis is the determination of the effects of loads on physical structures and their components. Structures subject to this type of analysis include all that must withstand loads, such as buildings, bridges, vehicles, furniture, soil strata, prostheses and biological tissue.

Filter by
Sorted by
Tagged with
1
vote
1answer
88 views

What diameter aluminum pole do I need to lift 100 lbs vertically?

I am wanting to use an aluminum pole (as a Jin Pole) to lift the mast on my sailboat into place. My mast is about 30 ft. long and weighs between 80 – 100 lbs. The aluminum pole would be stood ...
2
votes
2answers
635 views

Neutral axis in canteliver beam at support

First, I thought the neutral axis would just be the y bar which can be obtained from the centroid of the cross-section but is different. I have tried letting the net moment at the wall = 0 and the ...
0
votes
1answer
23 views

Someone please explain how to get the FAx and FEx because both support are pin.. I only got the FAy and FEy

Can someone explain how to get the Fx for the support A and E
0
votes
1answer
79 views

Understanding plastic deformation

Is understanding tensors a prerequisite for understanding plastic deformation (metal forming) equations, plane stress, plane strain conditions, etc..? If so which book should I use to understand ...
1
vote
1answer
176 views

FBD of folding table leg

I've drawn an FBD of one leg of the table the picture. I've a feeling I'm missing something. Am I?
0
votes
1answer
61 views

Stress analysis for the same configuration but different material

The same geometry and the same free body diagram. However, if we replace the material from steel to glass, for example. How does that influence the analysis? Two things I think are 1. steel is ...
1
vote
1answer
89 views

How to model a UDL over a plate for bending?

If I have a square plate of height h supported along one side (an L-bracket, modeled as fixed support), and there is an evenly distributed force acting over the face of the plate. From load analysis I ...
3
votes
3answers
2k views

Minimum thicknesses of an elliptical cylinder pressure vessel

For pressure vessels in the shape of circular cylinders, we can use $\sigma_{hoop}=\frac{pr}{t}$ to find the minimum skin thickness by setting the hoop stress the maximum allowed value, and then ...
0
votes
2answers
268 views

Solar Array Frame Design / Statics Design Problem

I need some help with a statics design problem. I am tasked with designing a solar panel frame to mount on a building and am the only engineer on staff so I don't have anyone else to ask the simple ...
3
votes
1answer
615 views

Shear strength polymers

I was looking for some shear strength properties of common polymers/plastics.... I have not found any usefull information yet. I know polymers aren't that linear elastic, but I expected to find some ...
2
votes
0answers
76 views

How to join two beams rigidly?

Hi I am making a beam model using Abaqus. There are two beams created. I wanted to join two beams rigidly in the connection to transfer moments between beams. However, I do not know what connector or ...
0
votes
1answer
330 views

Strain gauge placement to measure a twisting beam

Where is it best to place a strain gauge to measure the twist of a beam? And what type of gauge is best? In my application, I have a small metal part which experiences a twisting and bending force. ...
3
votes
4answers
369 views

Is there any need to consider loading sequence in construction stage for structure analysis?

Load sequence in phases can be considered applying the self-weight load only to the story added in the appropriate phase. Assuming that the material will not go into yield stage ( will always be at ...
1
vote
1answer
51 views

Is it true that if the structure damaged or corroded, the stress will be lower?

I am comparing the stress results between original or non-corroded model to corroded model. I found that the stress value in non corroded model is lot more bigger than the corroded model, is it ...
2
votes
1answer
123 views

How to calculate residual strength of a corroded structure from their stress values?

Currently, I have an actual entire corroded bridge model in the FEM analysis in Abaqus I want to estimate the residual strength of this bridge due to corrosion from the output results in the Abaqus, I ...
5
votes
3answers
151 views

Do scaled models reflect strength characteristics of full size

Lets say you want to build a bridge out of carbon fiber. This has never been never been done before, and it's super expensive stuff. So your goal is to use as little material as possible, but ...
1
vote
0answers
248 views

Polyurethane tube simulation in Solidworks [closed]

I am doing polyurethane tube simulation in Solidworks Simulation. I am using material PUR for polyurethane already defined in Solidworks. I have a question about the model type to be selected for ...
0
votes
1answer
312 views

Should I apply Force or Pressure, Ansys Static Structural

I am working on a project where I must find the maximum principal stresses on an object subjected to impact loading condition. I know the velocity of the object (the one which will hit the test object)...
1
vote
3answers
3k views

Transfering moment through internal hinge

My professor says, the internal hinge can not transfer moment: But can we calculate $\Sigma M_A=0$ for whole beam ( without cutting it or something) this way?: $\Sigma M_A=0 ===\Rightarrow M_A+(D_y ...
1
vote
1answer
3k views

What does 1 x rpm or 2 x rpm or 3 x rpm in vibration analysis mean?

a description for virbation monitoring of industrial bearings states: peak amplitues at 1 x rpm should be an indicator for a fault in my case. Can somebody explain me what I have to understand ...
0
votes
1answer
68 views

Difficult Toy Ball Analysis

Note, as I have my degree in chemistry, I denote "=>" as the next step in the equation. Also, sorry for any obvious mistakes that I made - as I mentioned, my degree is not in engineering. Thanks! I ...
3
votes
1answer
168 views

Resist rotation with friction or teeth?

I prototyped this attractive wooden sit/stand laptop stand but ran into a problem keeping the legs tight enough to hold their position. There are 1/16" thick EPDM washers between the oak legs - the ...
4
votes
3answers
73 views

Shear force expression for singly supported triangular load

From equilibrium: $$C_y = \frac{w_0L}{2}$$ And the load is given by: $$w(x) = \frac{w_0}{L}x$$ Thus the expressions for shear and moment are given by: $$V(x) =\int{-w(x)dx}=-\frac{w_0}{2L}x^2 + C_1\...
0
votes
1answer
497 views

What is the maximum deflection and bending moment of a hinged hinged beam? [closed]

It is not a simply supported beam with one end hinged the other end with roller support. I am working on both the ends hinged beam. i.e at the two ends only rotation about z axis is allowed and all ...
0
votes
0answers
34 views

Independent constraints - Procedure to verify it

I am wondering if there is a procedure to verify that the constraints of a system of rigid bodies are independent. Here there is an example of a system with dependent constraints: L beam - Strange ...
2
votes
1answer
76 views

L beam - Strange result

I have the following system (at P and Q there is a ball joint; the length of L beam is l; the PB and PA forces are applied at l/2 and are known; Fz is not zero and is known): The system has 0 degrees ...
3
votes
2answers
2k views

Is it safe to slightly cut the edge of RCC beam for passage of AC Vent and wiring?

My electrician made a cut in the wall and the beam as in the image in my absence. The cutting is done with hammer and chisel and it is around 1.5inch deep..I'm really worried that it might impact the ...
1
vote
2answers
879 views

Finding the displacement in a truss using energy method Question

I've been trying to revise for an upcoming final so I am solving problems from the previous chapters.I've been wracking my head on this for a while (about 1-2hrs) but I just can't seem to get it. For ...
0
votes
2answers
623 views

How can I determine horizontal force reactions in a fixed on both ends beam [closed]

How can I determine horizontal force reactions in a fixed on both ends beam like this one?
1
vote
1answer
98 views

Cantilever beam with disc at end (structural mechanics)

I am trying to figure out how I can assemble multiple finite elements to obtain the system mass matrix $\boldsymbol{M}$ and the stiffness matrix $\boldsymbol{K}$. The situation is depicted in a ...
1
vote
2answers
120 views

How to analyse a frame of a machine?

I am bit confused in considering the methods to apply for designing. Consider a machine, which as several parts mounted on the frame (frame is of any sectional shape for exampe: ´I´ section). Let ...
2
votes
1answer
78 views

Rayleigh damping in structural mechanics

In structural mechanics, we often approximate a partial differential equation by a system of ordinary differential equations in matrix form $$\boldsymbol{M}\ddot{\boldsymbol{q}}(t)+\boldsymbol{B}\dot{...
0
votes
1answer
40 views

Machines components?

When analyzing machines, how to tell if a point that was attached to another part will have only an $x$ or $y$ component or both? why wouldn't point $B$, $C$ and $A$ have an $x$ component?
1
vote
2answers
153 views

Trying to shed some weight on my design, any thoughts?

I am trying to design a lifting mechanism and I would love some insight/opinions as to how I can shed some weight off it. The current weight I have for my mechanism is 187.5kg, however, this is ...
6
votes
4answers
3k views

Is it useful to stuff my glasses with newspaper to protect them?

(I'm not sure if this question belongs to this stack exchange, but it seems appropriate to me) I have a very practical situation and our knowledge is lacking to be able to solve our debate. The ...
1
vote
2answers
347 views

Stability Check of Masonry or Brick Vault (or arch)

I need Some help in Checking the stability of a masonry vault (Voute in french) or even an arch. Hand Calculation: If anyone know any article or reference that can help me to check the stability of ...
1
vote
0answers
67 views

Calculating the Structural Forces Required to Support a Robot on an Overhanging Beam

this is my first time posting on here and I have a question regarding the structural properties a beam will need in order to fulfill some requirements we have for our robotics team. The scenario is as ...
1
vote
2answers
198 views

Pneumatic Can Crusher (Number of holes allowed for crushing plate)

Hi I'm designing a pneumatic can crusher for my course, and came across a problem. How many allowable holes would be ideal to relieve pressure on the crushing plate of the device? Are there ways to ...
2
votes
3answers
70 views

Support columns inside metal tubing

Does structural metal tubing (e.g., either as HSS, or in space frames, or even motorcycle/bicycle frames) ever come with any small metal rods or columns inside of the tubing itself? While it might ...
1
vote
0answers
1k views

Simply Supported beam with multiple point loads and distributed load [closed]

How can I solve this problem using FEM (longhand calculation)? I want to find deflections at each load point. This is not a homework problem. This is related to a project that I and my brother is ...
2
votes
2answers
4k views

Transfer of moments in beams with internal hinges

We have a beam with 1 internal hinge just like the picture. We know the internal hinge can not transfer moments between AB and BD. We know the 30 kN force makes some moments on BD & AB. If B (...
1
vote
0answers
373 views

Beam element stiffness matrix for variable area cross section with mass and shear center not coinciding

I would like to find the full (12 by 12) Timoshenko beam element stiffness matrix for a variable cross section with mass center axis and elastic center does not coincide. I have the full stiffness ...
1
vote
2answers
106 views

Which frame is optimal for children's bicycle trailers? tubular or rectangular frame and why? [closed]

I need to construct a 3D wooden bicycle trailer for Kids. The weight of bicycle trailers must also be light! The Frame should be made of wood. what criteria should I use to construct a Frame,Children'...
1
vote
1answer
416 views

An interpretation of the slope-deflection method (or displacement method)

I want to be sure that the way I like to think about the displacement method of analysis is correct. Suppose that a beam as given by the figure below is to be solved. Under this conditions, the ...
5
votes
4answers
838 views

Plastic modulus

Are there some general guidelines for approximating the plastic modulus of steel under tension so that a bilinear stress strain curve can be defined for Loading beyond the elastic region?
3
votes
1answer
60 views

Contact stress of bearing surfaces

I am searching for information on how finite element code (abaqus /ansys) could be used to model the contact stress behaviour between 2 bearing surfaces? The key point is that there is an additional ...
0
votes
1answer
2k views

Structural Analyses of Trusses, method of joints

Symmetrical truss is given: I have issue with the sign convention for joint H. See below the solution for joint I. As you can see, when calculating equilibrium in y (vertical) direction, forces that ...
2
votes
0answers
3k views

How to calculate the required thickness of a steel stiffener plate in a corbel/bracket

I am dealing with a setup similar to the image below. The horizontal plate is bolted to a horizontal concrete surface (Bridge Abutment). And a horizontal force is being applied to the the vertical. ...
1
vote
3answers
278 views

Difference in shear stress - one bolt vs two

So i have a little diagram to visualize: So lets say i have a 20 mm plate connected with two M8 bolts, and i apply a 30kN force in the direction shown in picture. Question is - would the force be ...
4
votes
1answer
153 views

3D construction [closed]

Can someone please tell you what to start with to construct a Kids Bike Trailer as 3D. It should select material and geometry. I think I should start sketching with forces (children's weight) and ...

1
4
5
6 7 8