Abstract
This chapter discusses material selections and damage tolerance criteria. Engineering applications of the fatigue and fracture technologies will be discussed in this chapter including material selections and fracture prevention, weld improvement and repair, damage assessment and damage tolerance criteria, and non-destructive inspection. The causes for damages are investigated, and damages repaired or weld details are modified when necessary. The damage tolerance criteria are discussed. The feedback from the process of inspection, causes, investigation, repair, and modification is given to design through rule changes and development of design guidance, such as fatigue resistant details. This chapter emphasizes the importance of material selections and fracture prevention with the help of subheadings like material selection, higher strength, and prevention of fracture. Weld improvement and repair is also explained in various sub-sections. Comparison of different techniques allows assessment of their effectiveness and cost. The recommended improvement strategies depend on the characteristics of the structure and the preference for one technique over others is based on effectiveness cost and fabrication yard characteristics. The section, “damage tolerance criteria,” is devoted to fatigue cracks. A damage tolerance analysis for fatigue cracks makes use of fracture mechanics to quantitatively assess the residual strength and residual life of a cracked weld detail. The discussions in this chapter are made using fatigue and fracture as an example. Similar discussions may be made on corrosion defects and wear out.
Published Version
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