+61-413 786 465

info@mywordsolution.com

## Engineering

 Civil Engineering Chemical Engineering Electrical & Electronics Mechanical Engineering Computer Engineering Engineering Mathematics MATLAB Other Engineering Digital Electronics Biochemical & Biotechnology

problem1)

First figure shows the impression of one of many lifting arrangements produced and used at a steel fabrication workshop. It was manufactured to lift a maximum of 50 kg and due to a product line change, it needs to be modified to lift a maximum mass of 100 kg. Furthermore, the lifting mechanism at the loading point needs to be changed to a motor-driven winch which weighs 26kg. This motor driven win ch can accelerate a loads of 100 kg to 0.8 m/s2 in 1 second. Due to these changes, the factory manager needs to know whether the present lifting cranes can be modified as quickly as possible using only the left over pipes that had been purchased to manufacture thethe original lifting cranes. Your task is to provide the manager with a suitable proposal.

The required design constraints are as follows:

Function of the existing cranes:

A loading block is attached as shown to Pipe 3. The load will be raised from the floor level to a height of 1.5 metres. Do not consider the geometry of the load at this stage. Pipe 2 is not attached to the base plate and free to rotate inside Pipe 1. Do not consider the plate attachment to the floor, assume pipe 3 is welded to a perfectly rigid plate. Pipe 3 is rigidly connected to Pipe 2 by means of welding etc.

Available materials for modifications:

Materials: A few lengths of each of Pipe1, Pipe 2 and Pipe 3. (All pipes are steel with Ultimate Strength is 320 MPa, Yield Strength 280 MPa, Shear Strength 248 MPa, E= 200 GPa, Poisson’s ratio =0.3, Density 7880 kg/m3)

Design Criteria:

Part 1

1) Use only your knowledge of the fundamentals of stress analysis. (pre-requisite MEC2402 or equivalent)
2) Do not use any FEA softwarefor this task. Only hand calculations using fundamental formulas will be accepted. Use your fundamental knowledge in Stress Analysis. Strictly, do not use design formulas provided in design calculations, software orstandards. Use suitable assumptions where required.
3) You have to list all your assumptions and highlight them. You are free to make justifiable assumptions to resolve statically indeterminate situations or problems. You also need to prepare and identify the parameters used in your fundamental equations .
4) Provide suitably neat hand sketches where necessary and the final proposal must be sketched clearly. CAD packages can be used to present your design, but clearly define features with comments where appropriate. You are free to assume general engineering workshop processes are available for implementation of your modifications.
5) find out required lengths of materials and provide a cutting list.

Design Limitations:

The overall size of the crane must not be changed. The height and reach of the loading point is to remain the same. Original parts must remain and you are allowed additions such as corner plates, , bracing , re-enforcing etc. The maximum stress level of any component needs to be less than 75 MPa. If you can’t maintain the max. stress level under the specific level, you need to justify it Also you need to limit the vertical and horizontal displacement at the loading point less than 50 mm.

Part 2

Create a suitable model with beam elements and perform an FEA for:
1) Original crane arrangement
2) Modified crane arrangement (Part 1)

• Hand calculations with sketches etc. for original crane – Part1
• Sketch of modified crane and hand calculations to show stress levels after modifications – Part 1
• Tabulate necessary/critical stress levels and location before and after modification (referring to your sketch) – Part1
• describe FEA analysis following a standard FEA reporting format.
• Tabulate FEA results and compare FEA results with hand calculations
• Conclusions

problem 2

Second figure shows rough sketch of the selected representative critical part of a “Quick Coupler” (of an earth moving equipment) made with cast steel. You need to perform FEA analysis to estimate critical stress levels at given operational conditions. You can assume applied load as P = 3kN.

1) Perform an FEA analysis for portion of the Quick Coupler with suitable constraints. (Hint: You can assume the sketch (b) represents the actual loaded component of the coupler. this critical part is taken from the circled area. You can consider the surfaces below the centre line (CL)s to be free and the top surface of the sketch to be rigidly connected to the larger body of the coupler)
2) Estimate the stress level at point A using your knowledge in “Stress Analysis”. Use only the given dimensions, and list clearly your assumptions and justify them.
3) Tabulate and compare FEA results with manually find outd values. describe the differences in the answers you determined from FEA and manual estimates. Justify your comments.

(b)

problem 3

1) You need to sketch shear force and bending moment diagrams and estimate maximum bending and shear stresses acting on the beam using your knowledge in beam analysis. Please note that this beam problem is statically indeterminate. However, you can solve this problem using manual methods. Also prepare standard second order differential equation for elastic curve for the deflection of beam AB and deduce an equation for beam deflection. (Take E=200 GPa)
2) Perform a 2D FEA (Beam analysis) and compare FEA results and manually determined values for reactions at A and B and the deflection at mid-point of the beam. (Tabulate your results)
3) Compare your FEA results with manually find outd values.

Mechanical Engineering, Engineering

• Category:- Mechanical Engineering
• Reference No.:- M9516

Have any Question?

## Related Questions in Mechanical Engineering

### Assignment - machine learning for signal processingproblem

Assignment - Machine Learning for Signal Processing Problem 1: Instantaneous Source Separation 1. As you might have noticed from my long hair, I've got a rock spirit. However, for this homework I dabbled to compose a pie ...

### Problem on shaft -assuming no frictional losses a torque of

Problem on Shaft - Assuming no frictional losses, a torque of T = 750lb·in is applied through the shaft of gear F in order to drive the roller chain at point B at a constant speed. The chain sprocket has a pitch diameter ...

### Materials behaviour from atoms to bridges assignment -

Materials Behaviour from Atoms to Bridges Assignment - Distributed loads and static equilibrium (Please note: you should show your steps with necessary figures) Q1. Two beam sections are jointed at C and supported at A b ...

### Heat transfer and combustionyou will need graph paper a

HEAT TRANSFER AND COMBUSTION You will need graph paper, a calculator, a copy of Appendix 1 from lesson HTC - 4 - 2 and access to steam tables to answer this TMA. 1. A fuel gas consists of 75% butane (C 4 H 10 ), 10% prop ...

### Fluid mechanics assignment - finite control volume analysis

Fluid Mechanics Assignment - Finite Control Volume Analysis and Dimensional Analysis Q1. The wind blows through a 7ft × 10ft garage door opening with a speed of 5 ft/s as shown in the figure. Determine the average speed, ...

### The aim of the project is to demonstrate certain aspects of

The aim of the project is to demonstrate certain aspects of engineering materials in different applications. The projects will be assessed on the basis of a written Research Report. The report should clearly show what yo ...

### The aim of the project is to demonstrate certain aspects of

The aim of the project is to demonstrate certain aspects of engineering materials in different applications. The projects will be assessed on the basis of a written Research Report. The report should clearly show what yo ...

### 5star questions amp answers1a define heat treatment bname

5 STAR QUESTIONS & Answers 1. A) Define Heat treatment B) Name different types of heat treatment processes C) Write any 4 purposes of Heat treatment 2. Explain various Heat treatment processes 3. A) Compare Thermo plasti ...

### Structural mechanics questions -q1 a 150-lb bucket is

Structural Mechanics Questions - Q1. A 150-lb bucket is suspended from a cable on the wooden frame. Determine the resultant internal loadings on the cross section at D, and at E. Q2. The shaft is supported at its ends by ...

### Alocate ten minutes for the presentationuse audio visual

Allocate ten minutes for the presentation Use audio / visual / technological supports / aids where appropriate Use a minimum of 3 properly referenced articles. THEMES PRESENTATION TOPIC MEMORY Discuss the three learning ...

• 13,132 Experts

## Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

### Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

### Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

### Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of \$ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

### Compute the present value of an 1150 payment made in ten

Compute the present value of an \$1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

### Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of \$ 699 per year for 19 years, given a discount rate of 6 percent per annum. As