Investigation of Fatigue Failure of Roll Shafts in a Tube Manufacturing Line

Pantazopoulos, G.; Zormalia, S.; Vazdirvanidis, Athanasios

doi:10.1007/s11668-010-9369-0

Cited by 21 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Macro-fractographic or visual observation of fatigue fracture reveals rather a smooth surface texture, comprising various topographic features; the most significant ones are the following (Figure 4), see also [27,28]:…”

Section: Fatigue Fracturementioning

confidence: 99%

A Short Review on Fracture Mechanisms of Mechanical Components Operated under Industrial Process Conditions: Fractographic Analysis and Selected Prevention Strategies

Pantazopoulos¹

2019

Metals

View full text Add to dashboard Cite

An insight of the dominant fracture mechanisms occurring in mechanical metallic components during industrial service conditions is offered through this short overview. Emphasis is given on the phenomenological aspects of fracture and their relationships with the emergent fracture mode(s) with respect to the prevailed operating parameters and loading conditions. This presentation is basically fulfilled by embracing and reviewing industrial case histories addressed from a technical expert viewpoint. The referenced case histories reflected mainly the author's team expertise in failure analysis investigation. As a secondary perspective of the current study, selected failure investigation and prevention methodological approaches are briefly summarized and discussed, aiming to provide a holistic overview of the specific frameworks and systems in place, which could assist the organization of risk minimization and quality enhancement.

show abstract

Section: Fatigue Fracturementioning

confidence: 99%

A Short Review on Fracture Mechanisms of Mechanical Components Operated under Industrial Process Conditions: Fractographic Analysis and Selected Prevention Strategies

Pantazopoulos¹

2019

Metals

View full text Add to dashboard Cite

show abstract

“…3a), indicating the presence of multiple crack initiation sites and high stress concentration, see also Ref. [5]. Furthermore, triangular shape ratchet areas may also indicate the occurrence of complex stress state including torsional loading mode.…”

Section: Investigation Resultsmentioning

confidence: 86%

“…No visible shaft distortion and essentially flat fracture surface indicated the operation fatigue caused under complex rotational/inplane/reversed bending loading mode [2,3]. Industrial machine elements and engine components, subjected to various complex stress states, such as transmission of rotational motion or behaving as cantilever beams sustaining high bending moments, suffered from torsional overload and fatigue failures [4][5][6][7][8][9].…”

Section: Investigation Resultsmentioning

confidence: 99%

Failure and Fracture Analysis of Austenitic Stainless Steel Marine Propeller Shaft

Pantazopoulos¹,

Papaefthymiou

2015

J Fail. Anal. and Preven.

Self Cite

View full text Add to dashboard Cite

A fractured in-service ship-propeller shaft (50.8 mm, i.e., 2-inches nominal diameter) was examined to determine the causes of failure and to recommend preventive measures to minimize the risk of recurrence. The findings of the failure analysis investigation suggest strongly that the shaft failed due to rotating bending fatigue initiated from the surface and close to the keyway area. The origin is located on a surface flaw (recess or dent) of approximately 100 lm depth, which could have probably being caused either during installation, operation, or maintenance. In addition, scoring lines formed due to friction-related processes and found on the journal surface were considered as stress raisers acting as potential sites for fatigue crack initiation. Careful review of the shaft service conditions and the implementation of suitable inspection procedures adapted to the vessel planned maintenance are recommended as necessary corrective actions for failure prevention.Keywords Fatigue Á Fractography Á Stainless steel shaft Á Fracture mechanics Brief Background HistoryA single part of the broken shaft (50.8 mm; i.e., 2-inches nominal diameter), along with one being still in operation, is shown in Fig. 1. The matched piece (2nd half) of the fractured shaft was not available (probably sank after fracture). Both shafts were driven by a dual heavy duty ship engine (2 9 720 HP), transmitting rotational motion to the propellers, and they have been in service for almost 14 years. Shaft fracture, during navigation, led to significant loss of engine power and temporary loss of vessel stability, without any additional safety-related consequence. A simplified drawing that shows a general layout of the shaft and the related components along with the fracture location is shown in Fig. 2. The above incident led to the activation of a failure analysis procedure in order to evaluate the cause of failure and recommend preventive measures to minimize the risk of recurrence. Analytical TechniquesMacrofractographic evaluation was performed using a stereomicroscope. Chemical analysis for steel grade identification was conducted using optical emission spectrometry. Hardness testing was performed using a universal hardness tester employing standard Rockwell C technique according to ASTM E-18 and Vickers hardness technique under 5 kg-force applied load according BS EN ISO 6507-1 standard. In addition, high-magnification fractographic observations were conducted on ultrasonically cleaned specimens, using a scanning electron microscope with a secondary electron detector for topographic evaluation and an energy dispersive x-ray spectrometer for elemental analysis.

show abstract

“…[9][10][11]. A foundation stud supporting the base of a casting machine, fractured after a short period in service, leading to unexpected production interruption and machine downtime.…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…Fractographic interpretation has been acknowledged for its significant impact to the society for many decades. Fractography is often used in combination with microstructurecharacterization techniques (light and scanning electron microscopy) in the majority of material failure analysis research projects [6][7][8][9][10][11]. Low-power stereomicroscopy (magnifications up to approximately 925), under vertical or oblique light illumination is the first approach in fracture evaluation, called macrofractography.…”

Section: Introduction and Background Informationmentioning

confidence: 99%

Damage Assessment Using Fractography as Failure Surface Evaluation: Applications in Industrial Metalworking Machinery

Pantazopoulos¹

2011

J Fail. Anal. and Preven.

View full text Add to dashboard Cite

Fractography is a powerful analytic tool for the evaluation of failure surface topography and root-cause analyses. Fractography, embracing both light and electron optics methods, is utilized in modern failure analysis and is recognized by the engineering community as a unique process for industrial problem solving, evaluating machinery/component failures, and providing solutions for performance improvements. In the present study, the role of fractography is highlighted through characteristic failures of industrial machinery components. Low-power stereomicroscopy and Scanning Electron Microscopy (SEM) micro-fractography are the principal analytic tools that were used in the context of the present research.

show abstract

Investigation of Fatigue Failure of Roll Shafts in a Tube Manufacturing Line

Cited by 21 publications

References 7 publications

A Short Review on Fracture Mechanisms of Mechanical Components Operated under Industrial Process Conditions: Fractographic Analysis and Selected Prevention Strategies

A Short Review on Fracture Mechanisms of Mechanical Components Operated under Industrial Process Conditions: Fractographic Analysis and Selected Prevention Strategies

Failure and Fracture Analysis of Austenitic Stainless Steel Marine Propeller Shaft

Damage Assessment Using Fractography as Failure Surface Evaluation: Applications in Industrial Metalworking Machinery

Contact Info

Product

Resources

About