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Failure Analysis & accident investigation Corrosion engineering Fatigue and fracture Fire investigation Expert witness in litigation Design & structural analysis Condition assessment

Fatigue and Fracture


Fractures widely happened in infrastructure, equipment, facilities in various industries, resulting in huge economic loss and danger to human lives. Fractures include ductile, brittle and fatigue fracture. Fatigue of materials and components occurs when they are under variable and repeated/cyclic loading(s). UTC can help the clients to avoid or minimise the fatigue and fracture incidents by determining the root cause(s) and improving their fatigue/fracture resistance through contract R & D.
UTC team consists of experts with more than 35 years of relevant industrial and research experience as well as qualifications. The key staff has successfully led and completed thousands of projects in forensic analysis, accident investigation, failure analysis (FA), condition assessment for aerospace, marine, petrochemical, electronic and microelectronic, construction, amusement, oil & gas, transportation industries and governmental agencies including Ministry of Defence (Singapore), Republic of Singapore Air Force (RSAF), Defence Science and Technology Agency (DSTA), Singapore Civil Defence Force (SCDF), Ministry of Manpower (MOM), Hyundai Engineering and Construction (Korean), Public Utilities Board (PUB), The Straits Times, SBS Transit, High Court, State Courts, China Taiping Insurance, Rajah & Tann, WongPartnership, Universal Terminal, Singapore Navy, SMRT, RWS, Shell, ST Aerospace, Eagle Services Asia, SIA Engineering, HP, Dell, ST Marine, Takenaka Corporation (Japan) and Sembawang Shipyard, etc.

Expert areas

Recent relevant publications

    Recently, UTC had published articles on failure analysis and accident investigation as follows:

  • "Improving quality and reliabity through effective failure analysis" was presented in Symposium on Materials Processing, Inspection and Testing held on August 24, 2017, Malaysia.


  • Click here to read more the presentation report.

  • "Forensic investigation on crane accidents" was published in International Journal on Forensic Engineering in 2017.


  • Click here to read the partial article.
    For full article, please contact the publisher.

Objectives


  • Determine origin(s) of fracture.
  • Understand mechanism(s) of fracture.
  • Discover root cause(s) of premature fracture.
  • Determine fatigue crack propagation rate/speed.
  • Explore strngthening mechanism(s) of fatigue resistance.
  • Research on new method(s) to improve fatigue resistance.
  • Evaluate (test) on fatigue strength of materials under different conditions.
  • Recommend counter measures and solutions to prevent recurrence of fatigue and fracture failures.
  • Support litigation/court hearing on liabilities related to failures and accidents.

  • Click here to understand more about what is effective failure analysis and accident investigation.


Typical projects

    Our experts had successfully accomplished thousands of failure analysis & accident investigation and contract R & D projects, some typical cases are listed as follows:

  • Research on surface strengthening on rotating bending fatigue limits of structural materials
  • Development of high strength anchorage systems to hold wire ropes for building and bridges
  • Failure analysis on crevice corrosion and fatigue of roller coaster vehicle spindle
  • Forensic investigation on rail fatigue of mass rapid transport system/ subway
  • Failure analysis on aircraft engine turbine blade fatigue
  • Failure analysis of wire rope fatigue of lift
  • Investigation on propeller bolt (fractured by corrosion fatigue) of hovercraft accident
  • Forensic investigation of corrosion fatigue of crane wire rope
  • Failure analysis on marine engine connecting rod and bolt fatigue
  • Research on shot peening on torsion fatigue etc.

Available Analytical Techniques

    According to the project requirements, following techniques are available for assessment and failure analysis on fatigue & fracture projects:

  • Scanning electron microscopy (SEM)
  • Energy Dispersive X-Ray spectrometry (EDX)
  • Sectional Metallography
  • Tensile/compression test
  • Fatigue test
  • Charpy impact test
  • X-ray diffraction (XRD)
  • X-ray photonelectron spectrometry (XPS)
  • Fourier transform infrared spectrometry (FTIR)
  • Differential scanning calorimetry (DSC)
  • Thermaogravimetry analysis (TGA)
  • Ultrasonic Testing (UT)
  • Radiographic Testing (RT)
  • Liquid/dye Penetration Test (LT)

Common failure types and mechanisms of fracture



  • brittle fracture
  • ductile fracture
  • low cycle fatigue
  • high cycle fatigue
  • corrosion fatigue
  • thermal fatigue
  • liquid metal brittleness
  • stress corrosion cracking
  • tempering brittleness
  • impurity grain boundary brittleness
  • etc.