Compressive strength and stiffness of filament-wound cylinders

2016 ◽  
Vol 35 (21) ◽  
pp. 1543-1553 ◽  
Author(s):  
Todd C Henry ◽  
Charles E Bakis
Keyword(s):  
Compressive Strength ◽  
Filament Wound ◽  
Strength And Stiffness

Influence of mosaic pattern on hygrothermally-aged filament wound composite cylinders under axial compression

2020 ◽  
Vol 54 (19) ◽  
pp. 2651-2659 ◽  
Author(s):  
Cristiano B Azevedo ◽  
José Humberto S Almeida Jr ◽  
Heitor F Flores ◽  
Frederico Eggers ◽  
Sandro C Amico
Keyword(s):  
Compressive Strength ◽  
Composite Structures ◽  
Mechanical Response ◽  
Filament Winding ◽  
Environmental Conditioning ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Strength And Stiffness ◽  
Hygrothermal Conditioning ◽  
Wound Composite

The mechanical response of composite structures may be affected by harsh environments, particularly when the matrix has a major contribution, e.g. with off-axis plies. This study aims at investigating the influence of the winding pattern on the axial compressive behavior of filament wound composite cylinder under hygrothermal conditioning. Carbon fiber-reinforced epoxy cylinders were manufactured via filament winding with 1/1, 3/1, and 5/1 mosaic winding patterns and submitted to distilled and artificial seawater environmental conditioning. Water uptake for each hygrothermal conditioning was periodically monitored. The winding pattern influenced both compressive strength and stiffness, and the environmental conditioning decreased strength up to ≈10%. The winding pattern with three diamonds around the circumference of the cylinders provides the properties in term of compressive strength and stiffness.

Numerical Analysis and Mechanical Properties of Nomex™ Honeycomb Core

2017 ◽  
Author(s):  
Yue Liu ◽  
Weicheng Gao ◽  
Wei Liu ◽  
Zhou Hua
Keyword(s):  
Compressive Strength ◽  
Cell Walls ◽  
Mechanical Response ◽  
Compressive Loading ◽  
Fe Model ◽  
Honeycomb Core ◽  
Practical Applications ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Strength And Stiffness

This paper presents an investigation on the mechanical response of the Nomex honeycomb core subjected to flatwise compressive loading. Thin plate elastic in-plane compressive buckling theory is used to analyze the Nomex honeycomb core cell wall. A mesoscopic finite element (FE) model of honeycomb sandwich structure with the Nomex honeycomb cell walls is established by employing ABAQUS/Explicit shell elements. The compressive strength and compressive stiffness of Nomex honeycomb core with different heights and thickness of cell walls, i.e. double cell walls and single cell walls, are analyzed numerically using the FE model. Flatwise compressive tests are also carried out on bare honeycomb cores to validate the numerical method. The results suggest that the compressive strength and compression stiffness are related to the geometric dimensions of the honeycomb core. The Nomex honeycomb core with a height of 6 mm has a higher strength than that of 8 mm. In addition, the honeycomb core with lower height possesses stronger anti-instability ability, including the compressive strength and stiffness. The proposed mesoscopic model can effectively simulate the crushing process of Nomex honeycomb core and accurately predict the strength and stiffness of honeycomb sandwich panels. Our work is instructive to the practical applications in engineering.

Space Shuttle filament wound case compressive strength study. II - Analysis

1986 ◽  
Author(s):  
M. MESSICK ◽  
R. NUISMER ◽  
G. JAMISON ◽  
S. GRAVES
Keyword(s):  
Compressive Strength ◽  
Space Shuttle ◽  
Filament Wound

scholarly journals Effects of Crumb Rubber on Compressive Strength of Cement-Treated Soil

2015 ◽  
Vol 61 (4) ◽  
pp. 59-78 ◽  
Author(s):  
F. C. Wang ◽  
W. Song
Keyword(s):  
Compressive Strength ◽  
Cement Content ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Test Results ◽  
Rubber Content ◽  
Strength Tests ◽  
Strength And Stiffness ◽  
Cement Soil ◽  
Curing Age

A study was undertaken to investigate the effects of crumb rubber on the strength and mechanical behaviour of Rubberized cement soil (RCS). In the present investigation, 26 groups of soil samples were prepared at five different percentages of crumb rubber content, four different percentages of cement content and two different finenesses of crumb rubber particle. Compressive strength tests were carried out at the curing age of 7 days, 14 days, 28 days and 90 days. The test results indicated that the inclusion of crumb rubber within cement soil leads to a decrease in the compressive strength and stiffness and improves the cement soil’s brittle behaviour to a more ductile one. A reduction of up to 31% in the compressive strength happened in the 20% crumb content group. The compressive strength increases with the increase in the cement content. And the enlargement of cement content is more efficient at low cement content.

Influence of blocks and grout on compressive strength and stiffness of concrete masonry prisms

2018 ◽  
Vol 182 ◽  
pp. 233-241 ◽  
Author(s):  
Roseli Oliveira Guedes Martins ◽  
Gustavo Henrique Nalon ◽  
Rita de Cássia Silva Sant'Ana Alvarenga ◽  
Leonardo Gonçalves Pedroti ◽  
José Carlos Lopes Ribeiro
Keyword(s):  
Compressive Strength ◽  
Concrete Masonry ◽  
Strength And Stiffness

Compressive strength and stiffness of Radiata Pine laminated veneer lumber

2013 ◽  
Vol 71 (6) ◽  
pp. 795-804 ◽  
Author(s):  
Wouter A. van Beerschoten ◽  
David M. Carradine ◽  
Alessandro Palermo
Keyword(s):  
Compressive Strength ◽  
Radiata Pine ◽  
Laminated Veneer Lumber ◽  
Strength And Stiffness

Experimental investigation of Tied Foam Core sandwich compression performance

2017 ◽  
Vol 22 (2) ◽  
pp. 349-369 ◽  
Author(s):  
Mohamed Adli Dimassi ◽  
Christian Brauner ◽  
Oliver Focke ◽  
Axel Siegfried Herrmann
Keyword(s):  
Compressive Strength ◽  
Failure Modes ◽  
Volume Fraction ◽  
Core Material ◽  
Foam Core ◽  
Compression Tests ◽  
Compression Performance ◽  
Compressive Loads ◽  
X Ray Computed ◽  
Strength And Stiffness

Carbon and glass dry fibre bundles were inserted into a ROHACELL® 71HERO polymethacrylimide foam core under a specific inclination angle and pin pattern in order to enhance the compressive strength and stiffness of the core material. Flatwise compression tests were conducted on pin-reinforced sandwich specimens and unreinforced sandwich to investigate the effect of pin volume fraction and pin material on the compressive mechanical properties and energy absorption characteristics. X-ray computed tomography was performed on tested specimens to investigate the failure modes under compressive loads. It was concluded that the compressive strength is mainly controlled by pin failure due to bending and compression loads at pin base. Moreover, increasing the pin volume fraction improved the compressive properties of the sandwich but using glass fibre pins instead of carbon fibre pins led to a higher increase of the absorbed crushing energy. Finally, an existing analytical model to predict the compressive strength and stiffness has been tested and evaluated.

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