Influence of Material Orthotropy on the State of Stress Around a Circular Hole in a Cylindrical Shell

1977 ◽  
Vol 99 (3) ◽  
pp. 454-458 ◽  
Author(s):  
H. V. Lakshminarayana ◽  
S. Viswanath
Keyword(s):  
Cylindrical Shell ◽  
Circular Hole ◽  
Numerical Solutions ◽  
Laminated Composite ◽  
The State ◽  
Pressure Loading ◽  
State Of Stress ◽  
Loading Matrix ◽  
Shell Finite Element ◽  
Anisotropic Cylindrical Shell

Numerical solutions are obtained for stresses around a circular hole in laminated composite cylindrical shells subjected to uniform internal pressure loading. Matrix method of structural analysis using a high-precision triangular laminated anisotropic cylindrical shell finite element is employed. Results are presented to show significant influence of composite material systems, winding patterns and curvatures on the state of stress around the opening.

Impact Response of Laminated Composite Cylindrical Shell: Finite Element Simulation Approach

2013 ◽  
Vol 393 ◽  
pp. 387-392 ◽  
Author(s):  
S. Sharifi ◽  
Thamir Aunal Deen Mohammed Sheet Almula ◽  
Soheil Gohari ◽  
G. Sharifishourabi ◽  
Yob Saed ◽  
...  
Keyword(s):  
Finite Element ◽  
Cylindrical Shell ◽  
Finite Element Simulation ◽  
Laminated Composite ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Composite Cylindrical Shell ◽  
Low Velocity ◽  
Element Simulation ◽  
Shell Finite Element

The effect of low velocity impact response on the thin laminated composite cylindrical shell with different stacking sequences was investigated. Finite element simulation using ABAQUS software was the base of the study during the analysis. The framework was to study the stress and displacement in radial and circumferential directions through finite element simulation. For simplicity, an arbitrarily picked circumferential path at where the impactor impacts the shell surface was selected. The graphs plotted based on stress and displacement variables Vs radial and circumferential directions did not show the significant changes for laminations with different stacking sequences. In addition, The 90 degree along circumferential and radial directions was found to be the critical point.

scholarly journals Half-plane contacts subject to remote tension

2021 ◽  
pp. 030932472098844
Author(s):  
Nils Cwiekala ◽  
David A Hills
Keyword(s):  
Contact Problem ◽  
Half Plane ◽  
Asymptotic Form ◽  
Fretting Fatigue ◽  
The State ◽  
Partial Slip ◽  
Practical Relevance ◽  
Plane Contact ◽  
State Of Stress ◽  
Plane Contact Problem

The state of stress present in an elastic half-plane contact problem, where one or both bodies is subject to remote tension has been investigated, both for conditions of full stick and partial slip. The state of stress present near the contact edges is studied for different loading scenarios in an asymptotic form. This is of practical relevance to the study of contacts experiencing fretting fatigue, and enables the environment in which cracks nucleate to be specified.

scholarly journals Effect of the Rock Stress on the Water Jet Cutting Performance

2021 ◽  
Author(s):  
Battista Grosso ◽  
Valentina Dentoni ◽  
Augusto Bortolussi
Keyword(s):  
Numerical Models ◽  
Step Function ◽  
Water Jet ◽  
The State ◽  
Cutting Performance ◽  
Lagrangian Analysis ◽  
State Of Stress ◽  
Water Jet Cutting ◽  
Cutting Rate ◽  
Available Technology

AbstractUnderground quarrying is rarely adopted for granite extraction due to the difficulties in the implementation of traditional technologies (drilling and explosive). As alternative to drilling and explosive, the combination of diamond wire and water jet seems to be the most promising available technology. The cutting performance achievable with the water jet technology depends on the operative parameters, the material characteristics and the state of stress within the rock massif. To assess the effect of the state of stress on the cutting rate, laboratory tests have been performed with an oscillating water jet machine on granite samples subjected to a static load. The stress distribution in the layer of rock to be removed has been evaluated by numerical simulation with the FLAC code (Fast Lagrangian Analysis of Continua). The correlation between the results of the cutting tests and the numerical models of the rock samples has been inferred. Starting from a conceptual model, which theoretically describes the relationship between the cutting rate and the stress, a step function was defined that indicates the ranges of stress where predefined values of the cutting rate are workable.

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