Development of Biaxial Servo Controlled Fatigue Testing System |
| Journal |
Key Engineering Materials (Volumes 321 - 323) |
| Volume |
Advanced Nondestructive Evaluation I |
| Edited by |
Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi |
| Pages |
57-62 |
| DOI |
10.4028/www.scientific.net/KEM.321-323.57 |
| Online since |
October, 2006 |
| Authors |
Akira Shimamoto,
Do Yeon Hwang,
Tetsuya Nemoto
|
| Keywords |
Biaxial Stress, Fatigue Crack, Fatigue Failures, Thermoelastic Stress Measurement |
| Abstract |
Destructive accident sometimes takes place though the equivalent stress is rather low in the
viewpoint of strength of materials. The propagation of fatigue cracks under multi-axial stress state
and cycling load gives the reason. Fatigue fracture has been considered as one of the most commonly
encountered industrial problems that lead to the damage of components in engineering products. In
general, the machine structure is always under stress concentration or stress cycles. Moreover, the
structure material is usually under two axes or multi-axial stresses instead of uniaxial stress state. It is
important, therefore, to clarify the propagation behavior and the fatigue failure problem of the crack
under the multi-axial stresses and cycling load from the safety reliability and accident prevention
measure. In this study, a biaxial fatigue experimental device was developed which can carry out a
wide range of fatigue tests under biaxial stresses. The developed experimental device was identified
with a biaxial fatigue experiments including static uniaxial and biaxial tensile test by using the
aluminum alloy flat plate as specimens. The propagation behavior of fatigue crack for center notched
cruciform specimen in the equal biaxial fatigue test was verified. |
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