Experimental Fatigue Life Investigation on a Standard PMMA Compact Tension Specimen Equipped by the Lock Technique

The lock technique is a method to decrease crack growth by putting a lock on the crack which the focus of this study is to experimentally characterize the influence of the lock technique on crack growth behavior and life assessment. In this study, polymethyl-methacrylate rectangular standard compact...

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Bibliographic Details
Published in:Journal of failure analysis and prevention 2019-12, Vol.19 (6), p.1630-1637
Main Authors: Kamali, A., Rezaeizadeh, M., Jomehzadeh, E.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Compact tension
Compression loads
Compression tests
Corrosion and Coatings
Crack initiation
Crack propagation
Cyclic loads
Edge cracks
Fatigue failure
Fatigue life assessment
Fatigue tests
Fracture mechanics
Fracture strength
Fracture toughness
Investigations
Life assessment
Materials Science
Polymethyl methacrylate
Quality Control
Reliability
Safety and Risk
Solid Mechanics
Technical Article > -Peer-Reviewed
Tribology
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Summary:The lock technique is a method to decrease crack growth by putting a lock on the crack which the focus of this study is to experimentally characterize the influence of the lock technique on crack growth behavior and life assessment. In this study, polymethyl-methacrylate rectangular standard compact tension plates were used as the test samples. Three different edge crack and lock configurations were tested for total six samples in order to assess fatigue life and fracture resistance, and experiments were conducted using a high-frequency fatigue test machine that applies cyclic tension–compression loads to the samples. In this study, effects of varying lock and hole geometry on crack initiation and propagations are investigated. Detecting of the crack initiation life and assessing crack propagation life from crack initiation until fracture moment are investigated. The experimental results show that the crack growth life is reduced in the lockless standard cracked specimen compared to the locked samples, and similarly, fracture strength in specimens equipped with the lock is more in comparison with the lockless specimens.
ISSN:1547-7029
1728-5674
1864-1245
DOI:10.1007/s11668-019-00745-4