Fracture analysis of U71Mn rail flash-butt welding joint

An other case study published in « Case Studies in Engineering Failure Analysis« , october 2015.

This paper mainly investigates the fracture problem of U71Mn rail flash-butt welding joint. The analysis results show that the welding joint is fatigue fracture, and the fracture surface morphology is the cleavage fracture characteristics.

Source : Fracture analysis of U71Mn rail flash-butt welding joint

Leg Weld Fatigue Cracks in Anhydrous Ammonia Nurse Tanks

A new case study of failure analysis was published on  Case Studies in Engineering Failure Analysis, april 2015

In an accident in southwest Iowa, USA in 2012, an anhydrous ammonia nurse tank vented its entire cargo of 5500 liters (1500 gallons) of liquid ammonia to the atmosphere. Follow-up study of the failed tank revealed a through-crack along a weld used to connect the tank to its running gear. The authors recommend that side-angle ultrasound be considered for use in periodic nurse tank inspections.

via Leg Weld Fatigue Cracks in Anhydrous Ammonia Nurse Tanks.

Failure analysis of the mobile elevating work platform

 

 

 

 

An interesting  paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com. This paper outlines investigations of the accident which occurred during startup of the extending structure from the transport position of a mobile elevating work platforms. The investigation results presented in this paper are important because same or similar problems could arise in supporting structures of various types of transportation, construction and mining machines.

More at : click here