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Detail of erosion on the front of the impeller blade. The coarse pitting on the surface of the blades led to a loss in pump efficiency and even to reduction in the mechanical strength of the blades.

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Fatigue failures in pumps - part 1_a7547.pdf
Fatigue is a common cause of failure in industrial machinery such as pumps. Engineers on plant sites should know the basic facts about this type of failure and the type of loads that cause it in order to recognise such failures and take steps to reduce their occurrence. In this first in a short series of articles, Rafael Ocampo revisits the basic theory concerning fatigue.
Fatigue failures in pumps - part 2_a7547.pdf
Rafael Ocampo and Braudilio Ruiz present several case studies to illustrate that fatigue can occur in typical, but also in deceptive working conditions. In particular, they discuss the influence of stress raisers on fatigue failure.
Fatigue failures in pumps - part 3_a7547.pdf
This final article uses real examples to illustrate how inattention to detail during maintenance, and failure to recognise stress concentrations can lead to mechanical breakdown. A final summing up of the causes of fatigue failures and steps to reduce their occurrence is also presented.

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Fatigue failure in pumps - a series by Rafael Ocampo

23 February 2010
Rafael Ocampo

In this short series of articles, Rafael Ocampo examines the basic theory concerning fatigue, the influence of stress raisers on fatigue failure, and the steps to take to reduce fatigue failures.

This three-part series of articles was first published in the World Pumps magazine. The series is presented here in its entirety.

This article is featured in:
Construction & Building • General Processing • HVAC / IAQ • Life Cycle Cost & Energy Efficiency • Mining • Oil and Gas • Power Generation • Pulp & Paper • Water and Wastewater

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