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Question 33229

posted 1 years ago

A simple bracket shown in the following figure is built from a 30 mm thick steel plate. This plate is fixed at the two small holes on the left and has a load applied to the larger hole on the right.Given that E =208GPA, and v = 0.33.
(a) Create the geometry in ANSYS™ and mesh the model. Show screen captures of meshed model with applied BCs.
(b) Calculate the peak displacement .at the right end of the model? Show screen captures of dof contour joints
(c) What type of elements did you use? Why? What assumptions if any have you made in the model development? Justify assumptions.
) Has your solution converged? Justify?
(e) Calculate the relative error in your model?

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Question 33231

posted 1 years ago

Given that E = 16,000 ksi, A = 6 in². Develop a finite-element model in ANSYS™ using top-down modeling in the following steps. Show screen captures of your work. Make sure you use a consistent set of units.
(b) Select an element type and justify your choice? Mesh the model such that is only one-element per line.
(d) Show a screen capture of your material properties and real constants
(b) Calculate the stress in element 1?
(g) Determine the axial-stresses in all the members? Create an output table with the axial stress values.
(a) Calculate the reaction forces?
(a) Create model geometry using the geometry for key points and lines indicated in the figure above. Present a screen capture of your model.
(e) Using the ANSYS™™ Post-processor, determine reaction forces? Show the output from ANSYSTM.
(f) Determine the nodal deflections for all the nodes? Create an output table with the nodal deflection values.
(c) Show a screen-capture of your meshed model with the applied loads and boundary conditions.

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Question 33230

posted 1 years ago

A retractable stability-boom called the "outrigger", is attached to the back of a heavy-lift truck and is designed to provide stability for lifting heavy off-centered loads. Figure 1 shows the stability-boom attached to the back of a truck in its retracted position. Figure 2 shows the stability boom fully extended and engaged for an off-center lift.
Given that the stability-boom is a 3-stage telescopic arm as shown in Figure 2, made of structuralA-36 steel with the Elastic Modulus, E = 208 GPa, Poisson's Ratio, v = 0.33, and yield strength,Oys = 265 MPa. Assume that the 2-largest telescopic stages are rectangular-tubular in x-section and the final stage is a rectangular tube with closed end (Figure 2).
The stability boom is 1.75-meter long in its retracted position and 3.75-meter long in the fully extended configuration. Assume that each of the 3-telescopic stages have equal exposed lengths in the fully extended configuration.
The truck is designed for a load capacity of 60,845 kg on the free-tip of the stability boom.Determine the x-section dimensions of the stability boom using the following steps:
(e) Show the contour plot of the von-mises stress, and the longitudinal normal-stress along the length. Identify the location of maximum stress in the stability boom?
(f) Using your finite element model, show if a higher load capacity can be attained using an alternate cross-section of the stability boom? Show all the sections analyzed.
(c) Determine the required section dimensions for the stability-boom iteratively starting from your initial guess in Part (b), using both the BEAM model and the Solid Model? Assume a Factor-of-Safety of 3 at maximum load. Show all the cases analyzed. Clearly list any section-properties used.
(d) Determine the free-end deflection at maximum load? Show the deformed and undeformed configuration of the stability-boom.
(a) Develop a Conceptual-Model for the fully-extended configuration of the stability-boom.Identify any assumptions, constraints, and boundary conditions. Justify why they are reasonable, and why the conceptual-model of the physical structure will represent the structure accurately.
(b) Based on the Conceptual-Model in Part (a), develop a Finite-Element Model of the stability boom using (i) BEAM Elements (ii) Solid Elements. Initially assume the cross-section dimensions.Show screen-shots of your meshed-model with dimensions, boundary conditions, and loads.

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Question 29061

posted 1 years ago

The bracket in blue is welded to a support. A force of 10 kN is applied through bearing force on the lower half of the circle (distributed load on the lower half of the circle with a resultant of 10kN). The thickness of the bracket is 50 mm.
ANSYS Workbench requirements:
1. Solve the problem :as a 3-dimensional problem using 3D solid element.
2. Solve the problem as a 2-dimensional problem using plane stress element.
3. Compare the results.
4. Verify the model and results.
1. There is no need to draw the support when solving the problem).
2. You may ignore the fillet during the 2D modelling of the problem.
3. Submit a report along with discussions (together with photos of your work).
4. Create a cover page on your own.

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Question 11151

posted 1 years ago

Describe the resulting velocity and temperature distribution at the outlet of the computational domain, for the case of Uhot water=D1.2 m/s,

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Question 11149

posted 1 years ago

What is the thickness of the boundary layer near the solid walls? How did you calculate it?

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Question 11148

posted 1 years ago

For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac),
Briefly describe the boundary conditions and the fluid properties in your CFD simulations.

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Question 11150

posted 1 years ago

Describe the behaviour of the residuals.

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Question 15875

posted 1 years ago

Let H1, … · ,Hk be hypothesis classes such that H1 C H2 C … c Hk and |H1 = 2', for every i E {1,..,k}. Suppose you are given a sample of size m (with each element chosen i.id.), and you want to learn the union of all these classes, that is you would like to learn the hypothesis class
H=\bigcup_{i=1}^{k} H_{i}
Consider two alternative approaches:
1. Learn on the sample using the ERM rule.
2. Divide that sample into a training set of size (1 – a)m, and a validation set of size amfor some a e (0,1). Then apply the approach of model selection using validation, i.e.:
• First, train each class H¡ on the (1 – a)m training examples using the ERM rulew.r.t. H; and let h1,..,h be all the resulting hypotheses.
• Second, apply the ERM rule w.r.t. to the finite class {h1,..,hg} on the am vali-dation examples.
Under which conditions is the second approach better? Justify your answerformally (using maximum 2 pages).

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Question 15874

posted 1 years ago

For the hypothesis class H defined by the following family of subsets of the real line:
[r,r+ 1] U [r + 2, 0), with r e R
Determine the VC-dimension of H. Justify your answer, by giving a proof (in maxi-mum 1 page).

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