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您的检索式：关键字=Fatigue testing
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| 1 | Effect of selective laser treatment on initiation of fatigue crack in the main part of an undercarriage drag strut显示文摘This paper presents the results of material characterization and a fatigue test conducted for a laser-re-melted drag strut used in an aircraft landing gear. The drag strut was re-melted with a CO_2 laser beam. Eight re-melted paths were made in the form of spiral lines along the axis of the drag strut. Next, the drag strut was subjected to variable loads on a testing machine simulating loads occurring when an aircraft lands. The fatigue test showed that the laser-treated drag strut was able to withstand 1700 simulated cycles of landing. This result was 70% better than that obtained for a drag strut with no laser treatment. In order to find the reason for the increase in the number of cycles of simulated landings, tests were carried out using transmission and scanning electron microscopes, a computer microtomograph, an X-ray diffractometer, and a nanoindenter,respectively. Results of the conducted research indicated that the reasons for the increased fatigue life of the laser-treated undercarriage drag strut were both an ultra-fine cellular martensitic microstructure and compressing residual stresses generated during the laser re-melting of the surface layer of the material. | Anna BIE? Marek SZKODO Jerzy DOBERSKI Bart?omiej KARPI?SKI | 2019 | Chinese Journal of Aeronautics2019，32，3： | 1 |
| 2 | THERMOGRAPHIC ASPECT ON LOADING A THIN-WALL PRESSURE VESSEL STEEL显示文摘The infrared emission of a high pressure vessel steel and two thin wall pressure vessel modelshave been investigated by use of vibro-thermography.The experimental infrared cracklengths were found to be agreed closely with the optical values during fatigue process.A possi-ble nondestructive testing method used to evaluate the pressure vessel has been given. | HUANG Yi LIN Xuerong XU Jun Institute of Metal Research,Academia Sinica,Shenyang,China HUANG Yi Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，10： | 1 |
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