http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Experimental studies of damage to aircraft skin under the influence of raindrops
Minggong Sha,Ying Sun,Li Yulong,Vladimir I. Goncharenko,Vladimir S. Oleshko,Anatoly V. Ryapukhin,Victor M. Yurov Techno-Press 2023 Advances in aircraft and spacecraft science Vol.10 No.6
Airplanes in flight collide with raindrops, and the leading edges of the airframe can be damaged when colliding with raindrops. A single waterjet testing platform was created to study rain erosion damage. Carbon fiber samples with three types of skins were studied and the mechanical properties were measured using a nanoindentation instrument. The research results show that the impact force on the sample increases with the continuous increase in the impact speed of raindrops, which leads to an increase in the damage area. Sheathing with low surface roughness is more damaged than other sheathings due to its rougher surface, and the result proves that surface roughness has a more significant effect on rain erosion damage to sheathings compared to their hardness.
Evidence for a narrow structure at W∼1.68 GeV in η photoproduction off the neutron
Kuznetsov, V.,Churikova, S.,Gervino, G.,Ghio, F.,Girolami, B.,Ivanov, D.,Jang, J.,Kim, A.,Kim, W.,Ni, A.,Vorobiev, Yu.,Yurov, M.,Zabrodin, A. North-Holland Pub. Co 2007 Physics letters: B Vol.647 No.1
New results on quasi-free η photoproduction on the neutron and proton bound in a deuteron target are presented. The γn->ηn quasi-free cross section reveals a bump-like structure which is not seen in the cross section on the proton. This structure may signal the existence of a relatively narrow (M∼1.68 GeV, Γ=<30 MeV) baryon state.