OS0531 Fatigue Property of Paper-Based Friction Materials Subjected to Out-of-Plane Tensile-Compressive Loading

Aluminium plates containing a single hole or multiple holes in a row are recently becoming very popular among architects and consultant engineers in many constructional applications, due to their reduced weight, as well as facilitating ventilation and light penetration of the buildings. However, there are still uncertainties concerning their structural behaviour, preventing them from wider utilization. In the present paper, local buckling phenomenon of perforated aluminium plates has been studied using the finite element method. For the purposes of the research work, plates with simply supported edges in the out-of-plane direction and subjected to uniaxial compression are examined. In view of perforations, circular cut-outs and the total cut-out size has been varied between 5 and 40% of the total plate area. Moreover, different perforation patterns have been investigated, from a single, central cut-out to a more refined pattern consisting of up to 25 holes equally distributed over the plate. Regarding the material characteristics, several aluminium alloys are considered and compared to steel grade A36 on plates of different slenderness. For each case the critical (Euler) buckling load and the ultimate resistance has been determined.A study into the boundary conditions of the plate showed that the restrictions at the edges parallel to the load direction have a large influence on the critical buckling load. Restraining the top or bottom edge does not significantly influence the resistance of the plate.The results showed that the ultimate resistance of aluminium plates containing multiple holes occurs at considerably larger out-of-plane displacement as that of full plates. For very large total cut-out, a plate containing a central hole has a larger resistance than a plate with equal cut-out percentage but with multiple holes. The strength and deformation in the post-critical regime, i.e. the difference between the critical buckling load and the ultimate resistance, differs significantly for different number of holes and cut-out percentage.

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Investigation on in-plane and out-of-plane constraint effects for plates with I-II mixed mode cracks under biaxial compressive loading

Theoretical and Applied Fracture Mechanics ◽

10.1016/j.tafmec.2021.103160 ◽

2021 ◽

pp. 103160

Author(s):

Li-Zhu Jin ◽

Chang-Yu Zhou ◽

Qi Pei ◽

Yong-Sheng Fan ◽

Le Chang ◽

...

Keyword(s):

Mixed Mode ◽

Compressive Loading ◽

Out Of Plane ◽

Constraint Effects

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Modelling Tow Compression in Textile Preforms During Composites Processing

Aerospace ◽

10.1115/imece2004-61470 ◽

2004 ◽

Author(s):

P. Potluri ◽

V. S. Thammandra ◽

R. B. Ramgulam

Keyword(s):

Deformation Behaviour ◽

Compressive Loading ◽

Final Part ◽

Initial Part ◽

Transverse Compression ◽

Fiber Assembly ◽

Compression Model ◽

Out Of Plane ◽

Composites Processing ◽

Transfer Moulding

Fiber assemblies, in the form of woven, braided, nonwoven or knitted structures, are used as reinforcements in composites. These textile structures are subjected to in-plane membrane stresses such as tensile and shear, and out-of-plane stresses such as bending and transverse compression. Amongst various modes of deformation, transverse compaction behaviour is the least understood mode; however this mode is very important for composites processing using vacuum forming, resin transfer moulding, thermoforming and hot compaction methods. The present paper reports a computational approach to predicting the load-deformation behaviour of textile structures under compressive loading. During the compression of a random fiber assembly, fibers are subjected to kinematic displacements, bending and finally transverse compression of individual fibres. In the case of interlaced architectures, such as woven and braided structures, it is convenient to deal with deformations at meso-scale involving yarns or tows, and deal with inter-fiber friction and fibre compression at yarn/tow level. It can be seen from the load deformation graphs that the initial part is dominated by bending energy and the final part by compression energy. A combined yarn bending and compression model was in good agreement with the experimental curve during the entire load-deformation cycle. On the other hand, an elastica-based bending model predicts well during the initial part while tow compression model predicts well during the final part. Inter-fiber friction was initially ignored — this is being introduced in the refined model for both the dry and wet states.

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Can a three-dimensional composite really provide better mechanical performance compared to two-dimensional composite under compressive loading?

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684418802028 ◽

2018 ◽

Vol 38 (2) ◽

pp. 49-61 ◽

Cited By ~ 7

Author(s):

M Tarfaoui ◽

M Nachtane

Keyword(s):

Mechanical Performance ◽

Split Hopkinson Pressure Bar ◽

Compressive Loading ◽

Three Dimensional ◽

Woven Composites ◽

Two Dimensional ◽

Hopkinson Pressure Bar ◽

Out Of Plane ◽

Split Hopkinson ◽

Pressure Bar

A series of split Hopkinson pressure bar tests on two-dimensional and three-dimensional woven composites were presented in order to obtain a reliable comparison between the two types of composites and the effect of the z-yarns along the third direction. These tests were done along different configurations: in-plane and out-of-plane compression test. For the three-dimensional woven composite, two different configurations were studied: compression responses along to the stitched direction and orthogonal to the stitched direction. It was found that three-dimensional woven composites exhibit an increase in strength for both: in-plane and out-of-plane tests.

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OS1326-271 Micro-damage evolution in paper-based friction materials subjected to out-of-plain compressive loading at elevated temperature

The Proceedings of the Materials and Mechanics Conference ◽

10.1299/jsmemm.2015._os1326-27 ◽

2015 ◽

Vol 2015 (0) ◽

pp. _OS1326-27-_OS1326-27

Author(s):

Tomoyuki FUJII ◽

Keiichiro TOHGO ◽

Shunya Kozaki ◽

Yoshinobu SHIMAMURA ◽

Tomohiro HASEGAWA ◽

...

Keyword(s):

Elevated Temperature ◽

Damage Evolution ◽

Compressive Loading ◽

Friction Materials

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Nonlinear Buckling Finite Element Analysis of Stiffened Steel Plates

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.699.450 ◽

2013 ◽

Vol 699 ◽

pp. 450-456 ◽

Cited By ~ 1

Author(s):

E. Gunay ◽

C. Aygun ◽

Y. O. Yıldız

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Compressive Loading ◽

Steel Plates ◽

Element Analysis ◽

Nonlinear Buckling ◽

Compressive Stresses ◽

Out Of Plane ◽

Global Buckling ◽

Stiffened Steel

In this paper, thin rectangular steel plates with stiffeners are examined under compressive loading. Consequently, nonlinear buckling finite element analysis (FEA) solutions are obtained by using ANSYS®. The local and global buckling patterns of stiffened steel plate geometries with simply supported boundary conditions are generated and critical buckling stresses are studied. Geometrically nonlinear buckling analyses are compared in order to evaluate the distributions of compressive stresses versus in-plane contractions and compressive stresses versus out-of plane deflections. Hence, it is concluded that there are critical load intervals. It is also observed that for critical loads, segments between stiffeners may switch from stable to unstable configurations under compressive stresses.

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Experimental study of reinforced masonry walls subjected to combined axial load and out-of-plane bendingThis article is one of a selection of papers published in this Special Issue on Masonry.

Canadian Journal of Civil Engineering ◽

10.1139/l06-167 ◽

2007 ◽

Vol 34 (11) ◽

pp. 1486-1494 ◽

Cited By ~ 1

Author(s):

Y. Liu ◽

K. Hu

Keyword(s):

Slenderness Ratio ◽

Compressive Loading ◽

Masonry Wall ◽

Test Results ◽

Secondary Effects ◽

Reinforced Masonry ◽

Out Of Plane ◽

Support Conditions ◽

The Moment ◽

Type Of Failure

Twelve reinforced masonry wall specimens with nominal dimensions of 2400 mm × 800 mm × 150 mm were tested under eccentric compressive loading with varying eccentricity to thickness ratios, e/t, and end eccentricity ratios, e1/e2. Pinned-pinned support conditions resulted in a slenderness ratio of 17.1 for all specimens. Test results showed that the variation of ultimate load, Pu, and effective modulus of rigidity values, EIeff, at failure depended on the type of failure mode, which was influenced by e/t and e1/e2 ratios and their interaction. Comparing ultimate loads obtained by test against those calculated using the EIeff values from the Canadian standard CSA S304.1-04 and against the ones calculated using the EIeff values proposed herein indicates that, while the moment magnifier method used in the current Canadian design standard to account for secondary effects is effective, the standard underestimates EIeff values, especially in regions where compression-controlled failure tends to predominate and, thus, leads to a conservative design. However, the use of proposed EIeff values in combination with the moment magnifier method provides estimations of ultimate loads in reasonably good agreement with test results.

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Anti-Tetrachiral Auxetic Structures Fabricated by Material Extrusion: Numerical and Experimental Investigation on Mechanical Properties Under Compressive Loading

10.21203/rs.3.rs-509233/v1 ◽

2021 ◽

Author(s):

Soham Kantilal Teraiya ◽

Swapnil Vyavahare ◽

Shailendra Kumar

Keyword(s):

Mechanical Properties ◽

Experimental Investigation ◽

Compressive Loading ◽

Design Parameters ◽

Material Extrusion ◽

Response Characteristics ◽

Out Of Plane ◽

Auxetic Structures ◽

Face Centered ◽

Grey Relational

Abstract The present article describes a numerical and experimental investigation on mechanical properties of anti-tetrachiral auxetic structures under compressive loading. The structures of ABS material are fabricated by material extrusion (ME) technique of additive manufacturing (AM). The influence of design parameters, namely node radius and ligament thickness, is studied on responses including strength, modulus and specific energy absorption (SEA) of the in-plane and out-of-plane oriented structure. The experiments are planned using face-centered central composite design and the results are analyzed using analysis of variance (ANOVA). From the experimental study, it is found that both design parameters significantly influence the response characteristics of structures. In case of compression loading of in-plane oriented structures, strength and modulus increase with a decrease in node radius and increase in ligament thickness, while SEA increases with a decrease in node radius and ligament thickness. In case of out-of-plane orientation, strength and modulus increase with an increase in node radius and ligament thickness, while SEA increases with an increase in node radius and decrease in ligament thickness. Further, regression models are developed and optimization is performed using grey relational analysis (GRA) to maximize the responses.

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