An investigation of the failures of over 60 materials handling machines found that about 10% of failures can be attributed to fatigue failure. In most cases, these failures were unexpected and lead to catastrophic consequences. In this article, the author discusses the process of fatigue damage relating to cranes and materials handling machines.
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Rotating steel shafts are typically one of the most critical mechanical components on mobile equipment. This article talks about some general principles of good shaft design and issues to be aware of.
Control systems on mobile equipment have advanced greatly in recent years and large SCADA datasets are available to analyse the machine performance. ASPEC has been processing and translating the SCADA data into engineering information, which is then used to carry out machine health checks to validate machine performance as part of asset management reviews.
The International Standard ISO5049.1, for bulk materials handling machines such as stackers, reclaimers, ship loaders and ship unloaders, was used in Australia until 1995. Since then Australia has followed the AS4324.1 standard. There are significant differences between the two standards; this article will explain further.
Standards Australia recently published the latest edition of AS4324.1 Mobile equipment for continuous handling of bulk materials – General requirements for the design of steel structures in December 2017. The standard was first published in 1995 and the revision has been prepared by the Standards Australia ME43 committee to update it and clarify some areas which have caused ambiguity over the last 20 years of use.