Stability of an orthotropic cylindrical shell under axial compression with not axially symmetric strains

1974 ◽  
Vol 10 (8) ◽  
pp. 888-891
Author(s):  
I. Yu. Babich ◽  
I. I. Chernushenko ◽  
N. A. Shmul'ga
Keyword(s):  
Cylindrical Shell ◽  
Axial Compression ◽  
Orthotropic Cylindrical Shell ◽  
Axially Symmetric

Collapse of Arteries Subjected to an External Band of Pressure

1980 ◽  
Vol 102 (1) ◽  
pp. 8-22 ◽  
Author(s):  
A. M. Hecht ◽  
H. Yeh ◽  
S. M. K. Chung
Keyword(s):  
Reynolds Number ◽  
Blood Flow ◽  
Cylindrical Shell ◽  
Orthotropic Cylindrical Shell ◽  
Reynolds Numbers ◽  
Intraluminal Pressure ◽  
Collapse Pressure ◽  
Vessel Size ◽  
Flow Reynolds Number ◽  
Small Band

Collapse of arteries subjected to a band of hydrostatic pressure of finite length is analyzed. The vessel is treated as a long, thin, linearly elastic, orthotropic cylindrical shell, homogeneous in composition, and with negligible radial stresses. Blood in the vessel is treated as a Newtonian fluid and the Reynolds number is of order 1. Results are obtained for effects of the following factors on arterial collapse: intraluminal pressure, length of the pressure band, elastic properties of the vessel, initial stress both longitudinally and circumferentially, blood flow Reynolds number, compressibility, and wall thickness to radius ratio. It is found that the predominant parameter influencing vessel collapse for the intermediate range of vessel size and blood flow Reynolds numbers studied is the preconstricted intraluminal pressure. For pressure bands less than about 10 vessel radii the collapse pressure increases sharply with increasing intraluminal pressure. Initial axial prestress is found to be highly stabilizing for small band lengths. The effects of fluid flow are found to be small for pressure bands of less than 100 vessel radii. No dramatic orthotropic vessel behavior is apparent. The analysis shows that any reduction in intraluminal pressure, such as that produced by an upstream obstruction, will significantly lower the required collapse pressure. Medical implications of this analysis to Legg-Perthes disease are discussed.

Buckling of a thin-walled cylindrical shell with foam core under axial compression

2011 ◽  
Vol 49 (1) ◽  
pp. 106-111 ◽  
Author(s):  
L. Ye ◽  
G. Lu ◽  
L.S. Ong
Keyword(s):  
Cylindrical Shell ◽  
Axial Compression ◽  
Foam Core ◽  
Thin Walled
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