Effects of rivet hole arrangement on fatigue performance of thin sheets for fuselage: DIC and numerical calculation

Influence of foreign object impact mode on fatigue performance of 2198‐T8 Al‐Li alloy thin sheets for fuselage

Fatigue & Fracture of Engineering Materials & Structures ◽

10.1111/ffe.13338 ◽

2020 ◽

Vol 44 (1) ◽

pp. 115-128

Author(s):

Yajun Chen ◽

Xuechun Pan ◽

Changtian Zhang ◽

Zifan Cui ◽

Chunming Ji

Keyword(s):

Fatigue Performance ◽

Thin Sheets ◽

Foreign Object ◽

Impact Mode

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Effects of hole reaming on fatigue performance of thin sheets for fuselage: DIC and FEM analysis

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2020.105893 ◽

2020 ◽

Vol 141 ◽

pp. 105893

Author(s):

Yajun Chen ◽

Jinchuan Yang ◽

Changtian Zhang ◽

Fusheng Wang ◽

Chunming Ji

Keyword(s):

Fem Analysis ◽

Fatigue Performance ◽

Thin Sheets

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Comparison of Acrylamide and Agar Gels by Freeze-Etching

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100080456 ◽

1977 ◽

Vol 35 ◽

pp. 606-607

Author(s):

Russell L. Steere ◽

Eric F. Erbe

Keyword(s):

Electron Microscope ◽

Sodium Hydroxide ◽

Sodium Hypochlorite ◽

Chromic Acid ◽

Distilled Water ◽

Thin Sheets ◽

Acid Cleaning ◽

Agar Gels ◽

Freeze Etching ◽

Water Cut

Thin sheets of acrylamide and agar gels of different concentrations were prepared and washed in distilled water, cut into pieces of appropriate size to fit into complementary freeze-etch specimen holders (1) and rapidly frozen. Freeze-etching was accomplished in a modified Denton DFE-2 freeze-etch unit on a DV-503 vacuum evaporator.* All samples were etched for 10 min. at -98°C then re-cooled to -150°C for deposition of Pt-C shadow- and C replica-films. Acrylamide gels were dissolved in Chlorox (5.251 sodium hypochlorite) containing 101 sodium hydroxide, whereas agar gels dissolved rapidly in the commonly used chromic acid cleaning solutions. Replicas were picked up on grids with thin Foimvar support films and stereo electron micrographs were obtained with a JEM-100 B electron microscope equipped with a 60° goniometer stage.Characteristic differences between gels of different concentrations (Figs. 1 and 2) were sufficiently pronounced to convince us that the structures observed are real and not the result of freezing artifacts.

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