DeGarmo's Materials and Processes in Manufacturing
DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 35, Problem 3P

Figure 35.A schematically depicts the design of a go-cart frame with cross bars and seat support. The assembly is to be constructed from hot-rolled, low-carbon, box-channel material with miter, butt, and fillet welds at the 12 numbered joints. Because of the solidification shrinkage and subsequent thermal contraction of the joint material, the welds are best made when one or more of the sections are unrestrained. If the structure is too rigid at the time of welding, the associated dimensional changes are restricted, causing the generation of residual stresses that can lead to distortion, cracking, or tears.

Chapter 35, Problem 3P, Figure 35.A schematically depicts the design of a go-cart frame with cross bars and seat support.

  1. Consider the 12 welds in the proposed structure and recommend a welding sequence that would minimize the possibility of hot tears and cracks because of the welding of a restrained joint.
  2. Your company is developing a computer-assisted design program. Suggest one or more rules that could be programmed to aid in the selection of an acceptable weld sequence.

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Chapter 35 Solutions

DeGarmo's Materials and Processes in Manufacturing

Ch. 35 - What are the four basic types of fusion welds?Ch. 35 - What are some of the common edge configurations...Ch. 35 - What is the role of an insert in welding?Ch. 35 - What types of weld joints commonly employ fillet...Ch. 35 - What are the five basic joint tvpes for fusion...Ch. 35 - What are some of the factors that influence the...Ch. 35 - Why is it important to consider welded products as...Ch. 35 - How does the fracture resistance and temperature...Ch. 35 - How might excessive rigidity actually be a...Ch. 35 - What is autogenous welding?Ch. 35 - In what way is the weld-pool segment of a fusion...Ch. 35 - Why is it possible for the fusion zone to have a...Ch. 35 - Why is it not uncommon for the selected filler...Ch. 35 - What are some of the defects or problems that can...Ch. 35 - Why can the material properties vary widely within...Ch. 35 - What are some of the structure and property...Ch. 35 - Why do most welding failures occur in the...Ch. 35 - Discuss the various regions within the...Ch. 35 - What are some of the characteristics and...Ch. 35 - What process features can increase the size of the...Ch. 35 - What are some of the difficulties or limitations...Ch. 35 - What is the purpose of pre- and postheating in...Ch. 35 - What heat-related metallurgical effects can...Ch. 35 - What causes weld-induced residual stresses?Ch. 35 - What is the cause of reaction-type residual...Ch. 35 - How are reaction stresses affected by the distance...Ch. 35 - What are some of the techniques that can reduce...Ch. 35 - How can the surfaces of weldments be put into...Ch. 35 - In what ways might welding create geometric...Ch. 35 - 40. Why might a welded structure warp if the...Ch. 35 - Why might a stress relief heat treatment be...Ch. 35 - What are some of the techniques that can be...Ch. 35 - Why are the terms weldability and joinability...Ch. 35 - Prob. 1PCh. 35 - Two pieces of AISI 1025 steel are being...Ch. 35 - Figure 35.A schematically depicts the design of a...Ch. 35 - Investigate and summarize some of the important...Ch. 35 - What do you foresee as the major difficulties when...
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