Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 30, Problem 55SDP
To determine
You are asked to inspect a welded structure for acritical engineering application. Describe the procedure thatyou would follow in order to determine the safety of thestructure.
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Students have asked these similar questions
1. What do you understand by the term welded joint? How it differs from riveted joint?
2. Sketch and discuss the various types of welded joints used in pressure vessels. What are the consider-
ations involved?
3. State the basic difference between manual welding, semi-automatic welding and automatic welding.
4. What are the assumptions made in the design of welded joint?
5. Explain joint preparation with particular reference to butt welding of plates by arc welding.
6. Discuss the standard location of elements of a welding symbol.
7. Explain the procedure for designing an axially loaded unsymmetrical welded section.
8. What is an eccentric loaded welded joint ? Discuss the procedure for designing such a joint.
9. Show that the normal stress in case of an annular fillet weld subjected to bending is given by
5.66 M
O =
Lsd2
where M= Bending moment; s = Weld size and d= Diameter of cylindrical element welded to flat
%3D
%3D
surface.
Select an appropriate weld technique and joint design for welding 150mm of thick material.
An arc welding is performed to join two metal pieces. After the welding process, the product is subjected to fatigue test. Discuss which part of the weld joint will have high potential to experience fatigue failure.
Chapter 30 Solutions
Manufacturing Engineering & Technology
Ch. 30 - Describe fusion as it relates to welding...Ch. 30 - Explain the features of neutralizing, reducing,...Ch. 30 - What is stick welding?Ch. 30 - Explain the basic principles of arc-welding...Ch. 30 - Why is shielded metal-arc welding a commonly...Ch. 30 - What keeps the weld bead on a steel surface...Ch. 30 - Describe the functions and characteristics of...Ch. 30 - What are the similarities and differences between...Ch. 30 - What properties are useful for a shielding gas?Ch. 30 - What are the advantages to thermit welding?
Ch. 30 - Explain where the energy is obtained in...Ch. 30 - Explain how cutting takes place when an...Ch. 30 - What is the purpose of flux? Why is it not needed...Ch. 30 - What is meant by weld quality? Discuss the...Ch. 30 - How is weldability defined?Ch. 30 - Why are welding electrodes generally coated?Ch. 30 - Describe the common types of discontinuities...Ch. 30 - Prob. 18RQCh. 30 - Explain why hydrogen welding can be used to...Ch. 30 - Prob. 20RQCh. 30 - Prob. 21QLPCh. 30 - It has been noted that heat transfer in gas-metal...Ch. 30 - Explain why some joints may have to be...Ch. 30 - Describe the role of filler metals in welding.Ch. 30 - List the processes that can be performed with...Ch. 30 - What is the effect of the thermal conductivity of...Ch. 30 - Describe the differences between oxyfuel-gas...Ch. 30 - Could you use oxyfuel-gas cutting for a stack of...Ch. 30 - What are the advantages of electron-beam and...Ch. 30 - Describe the methods by which discontinuities...Ch. 30 - Explain the significance of the stiffness of the...Ch. 30 - Prob. 32QLPCh. 30 - Which of the processes described in this chapter...Ch. 30 - Prob. 34QLPCh. 30 - Prob. 35QLPCh. 30 - Comment on the factors involved in electrode...Ch. 30 - Prob. 38QLPCh. 30 - Prob. 39QLPCh. 30 - Prob. 40QLPCh. 30 - Prob. 41QLPCh. 30 - What is weld spatter? What are its sources? How...Ch. 30 - Describe your observations concerning Fig. 30.20.Ch. 30 - Prob. 44QLPCh. 30 - Plot the hardness in Fig. 30.20d as a function of...Ch. 30 - A welding operation will take place on carbon...Ch. 30 - In Fig. 30.26b, assume that most of the top...Ch. 30 - A welding operation takes place on an...Ch. 30 - An arc welding operation is taking place on carbon...Ch. 30 - Comment on workpiece size and shape limitations...Ch. 30 - Arc blow is a phenomenon where the magnetic...Ch. 30 - Review the types of welded joints shown in Fig....Ch. 30 - Comment on the design guidelines given in...Ch. 30 - Prob. 55SDPCh. 30 - Prob. 56SDPCh. 30 - Make a list of welding processes that are suitable...Ch. 30 - Prob. 58SDPCh. 30 - Prob. 59SDPCh. 30 - Review the poor and good joint designs shown...Ch. 30 - In building large ships, there is a need to weld...Ch. 30 - Prob. 62SDPCh. 30 - Comment on whether there are common factors...Ch. 30 - Prob. 64SDPCh. 30 - Lattice booms for cranes are constructed from...Ch. 30 - A common practice in repairing expensive broken...
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- Two plates are a length (L) and thickness (t). were welded together. Assume these plates have similar material properties. For the same welded length. Which is better to use the lab joint? or the butt joint ? and why?arrow_forward(c) An arc welding is performed to join two metal pieces. After the welding process, the product is subjected to fatigue test. Discuss which part of the weld joint will have high potential to experience fatigue failure.arrow_forwardA welding operation is time-studied during which an operator was pace-rated as 120%. The operator took, on an average, 8 minutes for producing the weld-joint. If a total of 10% allowances are allowed for this operation. What is the expected standard production rate of the weld-joint in units per 8 hour day?arrow_forward
- A bracket to be welded into a steel channel using E-60 electrode 345 Mpa) Two welding sets are suggested as shown in Fig. (1)Based on maximum shear stress failure theory and safety factor of (2.5) (a) Find the weld size for each set. (b) Which set would you recommend A or B ?arrow_forwardThe below Figure Q1 shows an aluminium alloy sheet metal requires to be spot welded. In order for the weld to achieve its required strength, it has to be 2mm thick and the weld duration will be set at 0.3 sec. If it is assumed that the electrical resistance between the surfaces is 160 micro-ohms, and that only 40% of the electrical energy generated will be used to form the weld nugget (the rest being dissipated into the work), determine: a) The heat energy generated at the source b) The minimum current level required in this operation c) Assuming the heat transfer factor is 0.9, what would the melting factor be? d) The power density of the process, and comment on the value.arrow_forwardQUESTION 1 In an arc welding operation, a groove weld has a cross-sectional area=0.055 in² and is 24 in long. (Round your final answers to 1 decimal place) (a) What quantity of heat (in Btu) is required to accomplish the weld, if the metal to be welded is aluminum? Btu (b) How much heat must be generated at the welding source, if the heat transfer factor = 90% and the melting factor = 60%? H= Btuarrow_forward
- What advantages do the welded joints offer in comparison to riveted joints? Explain a minimum of seven?arrow_forwardQUESTION 3 Welding is a material joining process in which two or more parts are fused at their contacting surfaces by a suitable heat and/or pressure application. Several techniques of welding process are significant to join thin components at high precision and minimum defects. Select the best welding process to join aluminium sheets to produce floor panels in the Airbus military transport aircraft. Discuss in detail the chosen process, including the schematic diagram and justify the reason for choosing the selected process. Justify other possible applications of the process.arrow_forwardWhat is welding? What are the different types of welding? What are the symbols of welding? What are the testing/checking process of welding?arrow_forward
- what are the assumption made in the design of welded jointsarrow_forwardExample 27.2. A 100 mm x 10 mm plate is to be 150 mm x 10 mm by the fillet welding on three sides. The size of the weld is 6 mm. Find out the necessary over lap of the plate, for full strength of the joint. Take allowable tensile stress in plate equal to 150 N/mm and allowable stress in weld as 110 N/mm. welded to another platearrow_forwardengineering materials and processes Discuss the welding process and List the tools used in welding process. Identify its application and discuss its use.arrow_forward
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