We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Small‐sized specimen design with the provision for high‐frequency bending‐fatigue testing.
- Authors
Ghadimi, Hamed; Jirandehi, Arash P.; Nemati, Saber; Guo, Shengmin
- Abstract
The testing and study of emerging materials—such as additively manufactured materials—demands for specimen designs that are cost effective and time saving. The design of a small‐sized bending‐fatigue test specimen for an ultrasonic fatigue testing system is reported in this paper. The design is optimized based on the finite element analysis and analytical‐solution results to achieve the proper vibration shape and stress distribution. The proposed design is evaluated in the high‐ and very‐high‐cycle fatigue regimes under 20‐kHz frequency. Both simulation and testing results confirm that the desirable vibration mode occurs and the specimen fails at the designated test (gauge) section, where the maximum stress exists. The stress–life (S–N) curve is obtained for Inconel alloy 718 and indicates an expected trend. HIGHLIGHTS: A specimen design for the fatigue bending testing of metals via ultrasonic testers is delivered.The SEM observations of crack initiation/growth indicate failure occurs in the designed gauge section.The analytical, FEM, and experimental studies indicate the desired bending mode occurs at around 20 kHz.The maximum stress/strain location from FEM analysis matches with the failure location.
- Subjects
ULTRASONIC testing; METALS testing; FINITE element method; FATIGUE testing machines; STRESS concentration; INCONEL
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2021, Vol 44, Issue 12, p3517
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.13589