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Journal articles on the topic 'Materials Buckling (Mechanics)'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

KAN, KEVIN H. M., and EMILY D. CRANSTON. "Mechanical testing of thin film nanocellulose composites using buckling mechanics." TAPPI Journal 12, no. 4 (May 1, 2013): 9–17. http://dx.doi.org/10.32964/tj12.4.9.

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The Young’s modulus of multilayer films containing cellulose nanocrystals (CNCs) and polyethyleneimine (PEI) was measured using a buckling-based method and compared to analogous films containing nanofibrillated cellulose (NFC) and PEI [1]. For films 61 nm to 1.7 μm thick, the Young’s modulus was constant but strongly dependent on relative humidity. Films were stiffer at lower relative humidities, with modulus values of 16 ± 5, 12 ± 1, and 3.5 ± 0.3 GPa at 30%, 42%, and 64% relative humidities, respectively. CNC/PEI films had larger elastic moduli than NFC/PEI films. Both types of nanocellulose multilayer films showed the same modulus dependence on relative humidity over the range studied. Results suggest that ambient water might have an even more pronounced role in nanocomposites than in traditional natural fiber-reinforced composites. This straightforward buckling-based method has quantified mechanical properties and provided a useful comparison between CNC and NFC films. Furthermore, it qualitatively assesses that the components in the composite film are highly compatible and that the hydrophilicity and hygroscopicity of cellulose and PEI combined do not allow for the full mechanical potential of crystalline cellulose nanoelements to be exploited. This work is one approach toward finding dependable methods to characterize nanocellulose, specifically cellulosic thin films, which is increasingly important as we extract nanocellulose from wood, plants, algae, bacteria, and animals and enter a new age of cellulose materials.

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2

Becque, Jurgen. "Inelastic Plate Buckling." Journal of Engineering Mechanics 136, no. 9 (September 2010): 1123–30. http://dx.doi.org/10.1061/(asce)em.1943-7889.0000075.

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3

Ben Ammar, I., A. El Mahi, C. Karra, R. El Guerjouma, and M. Haddar. "Mechanical behaviour and damage evaluation by acoustic emission of composite materials." Multidiscipline Modeling in Materials and Structures 9, no. 1 (June 21, 2013): 100–115. http://dx.doi.org/10.1108/15736101311329188.

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PurposeThe aim of the present study is to investigate the mechanical behaviour of cross‐ply laminates under static tensile and buckling loading. Different cross‐ply laminates constituting of carbon fibers (CFRP), hybrid fibers (HFRP) and glass ﬁbers (GFRP) in an epoxy matrix were considered. This work is also interested in identifying and characterizing the local damage in the composites with the use of acoustic emission method (AE).Design/methodology/approachThe cross‐ply laminates are differentiated by the stacking sequences, thickness of 90° oriented layers and reinforcement. They are subjected to the static tensile and buckling load. The damage investigation is reached by the analysis of acoustic emission signals collected from static buckling tests.FindingsThe results show the effects of reinforcement type, stacking sequences and thicknesses ratio of 90° and 0° layers on the stiffness, failure load and displacement. A cluster analysis of acoustic emission data is achieved and the results are correlated to the damage mechanism of specimens under buckling tests.Originality/valueThe analysis of acoustic emission signals collected from static buckling tests under loading levels of 40, 60 and 100 per cent of the static failure load allows the damage investigation in cross‐ply laminates.

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4

Sun, Yueting, Yibing Li, Cang Zhao, Meng Wang, Weiyi Lu, and Yu Qiao. "Crushing of circular steel tubes filled with nanoporous-materials-functionalized liquid." International Journal of Damage Mechanics 27, no. 3 (December 12, 2016): 439–50. http://dx.doi.org/10.1177/1056789516683539.

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The crush behaviors of steel tubes filled with nanoporous-materials-functionalized liquids are experimentally investigated under quasi-static and dynamic conditions. Results show that the nanoporous-materials-functionalized liquid can enhance the load-carrying and the energy absorption capacities of thin-walled tubes, as the buckling mode is affected. The effective buckling stress increases with the infiltration pressure, and the overall compressibility is highly dependent on the nanopore volume. A general rule of designing nanoporous-materials-functionalized liquid-filled tubes is proposed. The interaction between the tube wall and the nanoporous-materials-functionalized liquid is analyzed.

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5

Pandey, Mahesh D., and Archibald N. Sherbourne. "Mechanics of Shape Optimization in Plate Buckling." Journal of Engineering Mechanics 118, no. 6 (June 1992): 1249–66. http://dx.doi.org/10.1061/(asce)0733-9399(1992)118:6(1249).

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6

Iguiñiz, Nestor, Riccardo Frisenda, Rudolf Bratschitsch, and Andres Castellanos-Gomez. "Buckling 2D Materials: Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials (Adv. Mater. 10/2019)." Advanced Materials 31, no. 10 (March 2019): 1970074. http://dx.doi.org/10.1002/adma.201970074.

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7

Spencer, Herbert H., and Herli Surjanhata. "On Plate Buckling Coefficients." Journal of Engineering Mechanics 112, no. 3 (March 1986): 249–59. http://dx.doi.org/10.1061/(asce)0733-9399(1986)112:3(249).

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8

Kang, Huairong, Pengfei He, Cunman Zhang, Ying Dai, Zhongde Shan, Yong Zang, and Hong Lv. "Tensile progressive damage and compressive postbuckling analysis of open-hole laminate composites." Journal of Reinforced Plastics and Composites 39, no. 17-18 (June 28, 2020): 637–53. http://dx.doi.org/10.1177/0731684420920355.

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Laminate composites contain holes as a means of connection in industrial applications. A better understanding of the mechanical properties of open-hole components is necessary. Herein, progressive damage postbuckling analysis models are proposed for investigation of tensile damage and compressive buckling behaviors of open-hole laminate composites. The progressive damage model is based on failure criteria provided by the continuum damage mechanics model; virtual crack closure technology was employed to calculate the energy release rate for crack delamination in compressive postbuckling analysis. The models were utilized to analyze variations in the tensile and compressive mechanical properties, failure process, and buckling evolution of open-hole laminate composites using finite element analysis. The tensile failure patterns and failure processes of plies with different open-hole laminate composite angles were obtained and analyzed. Buckling characteristics, as well as the progression of buckling onset, buckling propagation, crack delamination, unstable delamination, and global buckling, were investigated. The influence of delamination crack length and crack distribution on the buckling properties of open-hole laminate composites are discussed in detail. Additionally, unstable and stable buckling characteristics were examined. The numerical results were in good agreement with theoretical and experimental results; damage initiated at the edge of a hole propagated to two sides with the onset of matrix damage, followed by fiber damage. The fiber damage of a 0°-ply led ultimately to laminate failure. The laminate with a symmetrical crack distribution showed stable buckling, whereas a short, nonsymmetrical distribution of cracks usually led to unstable buckling and delamination.

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9

Chang-jun, Cheng, and Lui Xiao-an. "Buckling and post-buckling of annular plates in shearing, Part I: Buckling." Computer Methods in Applied Mechanics and Engineering 92, no. 2 (November 1991): 157–72. http://dx.doi.org/10.1016/0045-7825(91)90237-z.

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10

Hu, Jianying, Yu Zhou, and Zishun Liu. "The Friction Effect on Buckling Behavior of Cellular Structures Under Axial Load." International Journal of Applied Mechanics 10, no. 02 (March 2018): 1850013. http://dx.doi.org/10.1142/s1758825118500138.

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When soft cellular structures are compressed axially beyond critical limits, elastic instabilities induce buckling behavior. Although the nonlinear response of periodic materials with different shape voids has been widely investigated, the effect of the friction on the structural response has not yet been explored. In this paper, we develop a simple theoretical model for the buckling of holey column with holes. Meanwhile, we also numerically and experimentally explore the effect of friction on the buckling behavior of the cellular structures. We find out that friction could prevent conventional, global Euler buckling for holey column, which tends to choose the pattern switching mode, and our study also provides future perspectives for mechanics of buckling or optimal design for the cellular structures.

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11

NAGASHIMA, Hideaki, Kunio KOKUBO, Masaaki TAKAYANAGI, and Kouichi SAITOH. "Experimental study on the dynamic buckling of cylindrical tanks. 2nd report Comparison between static buckling and dynamic buckling." Transactions of the Japan Society of Mechanical Engineers Series A 52, no. 479 (1986): 1649–54. http://dx.doi.org/10.1299/kikaia.52.1649.

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12

Shih, W. Y., L. Kudryavtsev, and K. K. Wang. "Elastic Buckling of a Circular Disk due to Internal Membrane Forces." Journal of Applied Mechanics 62, no. 3 (September 1, 1995): 813–16. http://dx.doi.org/10.1115/1.2777115.

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Residual internal stresses often remain in materials after thermal-mechanical processes. Considerable deformation, such as elastic buckling, may result from such stresses. Some cases of circular-plate buckling due to internal membrane forces are analyzed in this work. The internal membrane-force field is introduced with a nonuniform radial temperature distribution in the disk. Detailed analysis is performed and critical buckling criteria are tabulated for some specific sets of parameters. Although the membrane force in the plate is axially symmetric, symmetry breaking is found at buckling. When the temperature is higher at the disk center, the first buckling mode is domeshaped, which maintains the polar symmetry. The mode of buckling, however, changes to a saddle shape when the radial temperature distribution is reversed.

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13

Antman, S. S., and C. L. Adler. "Design of Material Properties That Yield a Prescribed Global Buckling Response." Journal of Applied Mechanics 54, no. 2 (June 1, 1987): 263–68. http://dx.doi.org/10.1115/1.3173005.

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In the context of the large buckling of a nonlinearly elastic column under end thrust, this paper treats the design of (constitutive) functions appearing in bifurcation problems so as to produce a prescribed first bifurcating branch (e.g., a branch having a prescribed number of wiggles, which produce a prescribed pattern of hysteresis with snap bucklings in loading-unloading processes). The solution of this design problem also yields a method for determining a constitutive function from a single buckling experiment. A dual variational formulation is used to reduce the design problem to the solution of a linear Volterra integral equation of the first kind with a singular kernel. Effective numerical methods for the solution of such ill-posed equations are described and then applied to some physically interesting examples. Generalizations are discussed.

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14

Sui, Qianqian, Changliang Lai, and Hualin Fan. "Buckling analyses of double-shell octagonal lattice truss composite structures." Journal of Composite Materials 52, no. 9 (July 26, 2017): 1227–37. http://dx.doi.org/10.1177/0021998317723446.

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To reveal the compression failure modes of one-dimensional hierarchical double-shell octagonal lattice truss composite structures (DLTCSs), finite element modeling and equivalent continuum models were developed. DLTCS has three typical failure modes: (a) fracture of the strut, (b) global buckling, and (c) local buckling. Failure mode maps were constructed. It is found that column of long enough length will collapse at global buckling. When the column length decreases, the failure mode will turn to local buckling and strut fracture successively. Bay length greatly influences the buckling mode. Longer bay length could change the buckling mode from global buckling to local buckling. Compared with single-shell lattice truss composite structure, DLTCS has advantage in load carrying when the column fails at strut fracture or global buckling, while local buckling tolerance of DLTCS is smaller.

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15

Chang-jun, Cheng, and Lui Xiao-an. "Buckling and post-buckling of annular plates in shearing, part II: Post-buckling." Computer Methods in Applied Mechanics and Engineering 92, no. 2 (November 1991): 173–91. http://dx.doi.org/10.1016/0045-7825(91)90238-2.

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16

Tu, Tran Minh, Le Kha Hoa, Dang Xuan Hung, and Le Thanh Hai. "Nonlinear buckling and post-buckling analysis of imperfect porous plates under mechanical loads." Journal of Sandwich Structures & Materials 22, no. 6 (August 1, 2018): 1910–30. http://dx.doi.org/10.1177/1099636218789612.

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The nonlinear buckling and post-buckling response of imperfect porous plates is investigated analytically in this paper. The porous materials with elastic moduli are assumed to vary through the thickness of the plate according to two different distribution types. Governing equations are derived based on the classical shell theory taking into account Von Karman nonlinearity and initial geometrical imperfection. Explicit relations of load–deflection curves for rectangular porous plates are determined by applying stress function and Galerkin’s method. The accuracy of present theoretical formulation is verified by comparing it with available results in the literature. The effects of varying porosity distribution, porosity coefficient, boundary condition and imperfection on post-buckling behavior of the porous plate are studied in detail. A parametric study is carried out to investigate the effects of varying porosity distribution, porosity coefficient, boundary condition and imperfection on post-buckling behavior of the porous plate. The results show that the critical buckling loads decrease with increasing porosity coefficient and the post-buckling curves for nonlinear symmetric porosity distribution are always higher than those for nonlinear non-symmetric porosity.

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17

Al-Waily, Muhannad, Muhsin Jaber Jweeg, Mohsin Abdullah Al-Shammari, Kadhim K. Resan, and Ayad Murad Takhakh. "Improvement of Buckling Behavior of Composite Plates Reinforced with Hybrids Nanomaterials Additives." Materials Science Forum 1039 (July 20, 2021): 23–41. http://dx.doi.org/10.4028/www.scientific.net/msf.1039.23.

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Modifying buckling behavior of the composite structure has been investigated in the recent few years with different reinforcement fiber and powder materials and nanomaterials. It can be seen from previous studies that the addition of nanomaterials leads to a significant modification in the buckling behavior of structure by using a low mount of nanomaterials. In this work, reinforcement of composite materials using two types of nanomaterials together, SiO2 and Al2O3 nanomaterials, to modify the buckling behavior for plate structure is studied. Therefore, the investigation was done experimentally and numerically. The experimental work is performed by manufacturing composite plates with various weight fractions with the nanoeffect, and then their mechanical properties and buckling characterization were evaluated. The numerical work was done using the finite element method to estimate the plate structure’s buckling behavior with various nanomaterials effects. A comparison between the experimental and the numerical results for plate buckling behavior is expressed, showing that the discrepancy of the results was not more than 12.56%. Finally, the results showed that the buckling behavior for a reinforced plate was improved by 35% when two types of nanomaterials were used together.

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18

Elgindi, Mohamed B., Dongming Wei, Yu Liu, and Hailan Xu. "Buckling and post-buckling of graphene tubes." Mechanics of Advanced Materials and Structures 23, no. 4 (November 10, 2015): 402–6. http://dx.doi.org/10.1080/15376494.2014.981620.

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19

Groper, Meshulam, and M. Jerry Kenig. "Inelastic Buckling of Nonprismatic Columns." Journal of Engineering Mechanics 113, no. 8 (August 1987): 1233–39. http://dx.doi.org/10.1061/(asce)0733-9399(1987)113:8(1233).

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20

Teng, Jin‐Guang, and J. Michael Rotter. "Buckling of Restrained Monosymmetric Rings." Journal of Engineering Mechanics 114, no. 10 (October 1988): 1651–71. http://dx.doi.org/10.1061/(asce)0733-9399(1988)114:10(1651).

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21

Ang, K. K., and C. M. Wang. "Shear‐Flexural Buckling of Columns." Journal of Engineering Mechanics 116, no. 6 (June 1990): 1220–41. http://dx.doi.org/10.1061/(asce)0733-9399(1990)116:6(1220).

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22

Wang, C. M., and K. M. Liew. "Buckling of Columns with Overhang." Journal of Engineering Mechanics 117, no. 11 (November 1991): 2492–502. http://dx.doi.org/10.1061/(asce)0733-9399(1991)117:11(2492).

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23

Serra, M. "Flexural Buckling of Pretwisted Columns." Journal of Engineering Mechanics 119, no. 6 (June 1993): 1286–92. http://dx.doi.org/10.1061/(asce)0733-9399(1993)119:6(1286).

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24

Wang, C. Y., C. M. Wang, and Tun Myint Aung. "Buckling of a Weakened Column." Journal of Engineering Mechanics 130, no. 11 (November 2004): 1373–76. http://dx.doi.org/10.1061/(asce)0733-9399(2004)130:11(1373).

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25

Croll, James G. A. "Buckling of Cylindrical Tunnel Liners." Journal of Engineering Mechanics 127, no. 4 (April 2001): 333–41. http://dx.doi.org/10.1061/(asce)0733-9399(2001)127:4(333).

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26

Tang, Ye, Shun Zhong, Tianzhi Yang, and Qian Ding. "Interaction Between Thermal Field and Two-Dimensional Functionally Graded Materials: A Structural Mechanical Example." International Journal of Applied Mechanics 11, no. 10 (December 2019): 1950099. http://dx.doi.org/10.1142/s1758825119500996.

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The buckling and free vibration of a Euler–Bernoulli beam composed of two-directional functionally graded materials (FGMs) in thermal environment are analyzed. The material properties and temperature distributions are considered to be continuously varied along both axial and thickness directions. Such two-directional FGMs provide the basis of a promising strategy to tune the dynamic behavior of a structure in a controlled fashion, achieving tunable response as desired. The dynamic equation of the beam and relevant boundary conditions are derived based on Hamilton’s principle. The generalized differential quadrature method is used for determining the exact buckling configuration and the natural frequencies of the beam with different boundary conditions. Numerical results are presented to examine the effects of material gradations on the critical buckling temperature. It is concluded that both temperature change and material properties have significant influences on the natural frequency, which suggests that it is possible to tailor or tune the dynamic behaviors of a beam by using man-made FGMs in a complex environment.

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27

Soong, T. C., and I. Choi. "Buckling of an Elastic Elliptical Ring Inside a Rigid Boundary." Journal of Applied Mechanics 52, no. 3 (September 1, 1985): 523–28. http://dx.doi.org/10.1115/1.3169094.

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The buckling of a thin, elastic ring confined in an elliptical hole whose circumference is smaller than that of the ring is studied. The effect of post-buckling slippage of the ring along the boundary with a corresponding curvature change is included. Buckling configurations with no friction that are (a) symmetric to one axis, and (b) symmetric to both axes, and (c) buckling configurations with no-slip are presented. Buckling with a strain energy consideration added as a criterion and buckling merely from compatibility alone are discussed. Results include curves for buckling loads of different ellipticities for different radius-to-thickness ratios.

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28

Buehler, Markus J., Yong Kong, and Huajian Gao. "Deformation Mechanisms of Very Long Single-Wall Carbon Nanotubes Subject to Compressive Loading." Journal of Engineering Materials and Technology 126, no. 3 (June 29, 2004): 245–49. http://dx.doi.org/10.1115/1.1751181.

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We report atomistic studies of single-wall carbon nanotubes with very large aspect ratios subject to compressive loading. These long tubes display significantly different mechanical behavior than tubes with smaller aspect ratios. We distinguish three different classes of mechanical response to compressive loading. While the deformation mechanism is characterized by buckling of thin shells in nanotubes with small aspect ratios, it is replaced by a rod-like buckling mode above a critical aspect ratio, analogous to the Euler theory in continuum mechanics. For very large aspect ratios, a nanotube is found to behave like a flexible macromolecule which tends to fold due to vdW interactions between different parts of the carbon nanotube. This suggests a shell-rod-wire transition of the mechanical behavior of carbon nanotubes with increasing aspect ratios. While continuum mechanics concepts can be used to describe the first two types of deformation, statistical methods will be necessary to describe the dynamics of wire-like long tubes.

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29

Chen, Dayong, Jinhwan Yoon, Dinesh Chandra, Alfred J. Crosby, and Ryan C. Hayward. "Stimuli-responsive buckling mechanics of polymer films." Journal of Polymer Science Part B: Polymer Physics 52, no. 22 (September 19, 2014): 1441–61. http://dx.doi.org/10.1002/polb.23590.

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30

Xiao, Yang, and Cheng Chang-jun. "Buckling and post-buckling of annular plates on an elastic foundation." Applied Mathematics and Mechanics 12, no. 8 (August 1991): 785–97. http://dx.doi.org/10.1007/bf02458169.

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31

Faghfouri, Saeideh, and Franz G. Rammerstorfer. "Mode transitions in buckling and post-buckling of stretched-twisted strips." International Journal of Non-Linear Mechanics 127 (December 2020): 103609. http://dx.doi.org/10.1016/j.ijnonlinmec.2020.103609.

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32

Jam, Jafar Eskandari, and Esmail Asadi. "Buckling Analysis of Composite Cylindrical Shells Reinforced by Carbon Nanotubes." Archive of Mechanical Engineering 59, no. 4 (November 1, 2012): 413–34. http://dx.doi.org/10.2478/v10180-012-0022-1.

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In this paper, the authors investigate a cylindrical shell reinforced by carbon nanotubes. The critical buckling load is calculated using analytical method when it is subjected to compressive axial load. The Mori-Tanaka method is firstly utilized to estimate the effective elastic modulus of composites having aligned oriented straight CNTs. The eigenvalues of the problem are obtained by means of an analytical approach based on the optimized Rayleigh-Ritz method. There is presented a study on the effects of CNTs volume fraction, thickness and aspect ratio of the shell, CNTs orientation angle, and the type of supports on the buckling load of cylindrical shells. Furthermore the effect of CNTs agglomeration is investigated when CNTs are dispersed none uniformly in the polymer matrix. It is shown that when the CNTs are arranged in 90_ direction, the highest critical buckling load appears. Also, the results are plotted for different longitudinal and circumferential mode numbers. There is a specific value for aspect ratio of the cylinder that minimizes the buckling load. The results reveal that for very low CNTs volume fractions, the volume fraction of inclusions has no important effect on the critical buckling load.

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33

Arbocz, J., M. Potier-Ferry, J. Singer, V. Tvergaard, and I. Elishakoff. "Buckling and Postbuckling." Journal of Applied Mechanics 56, no. 3 (September 1, 1989): 732. http://dx.doi.org/10.1115/1.3176163.

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34

NAGASHIMA, Hideaki, Kunio KOKUBO, Masaaki TAKAYANAGI, Kouichi SAITOH, and Tetsuo IMAOKA. "Experimental study on the dynamic buckling of cylindrical tanks. 1st report Investigation of applicability of static buckling criteria to dynamic buckling." Transactions of the Japan Society of Mechanical Engineers Series A 52, no. 479 (1986): 1643–48. http://dx.doi.org/10.1299/kikaia.52.1643.

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35

Erdem, Serkan, Mustafa Gur, and Mete Onur Kaman. "Nonlinear buckling behavior of hybrid composites with different notch types." Materials Testing 63, no. 9 (September 1, 2021): 797–804. http://dx.doi.org/10.1515/mt-2021-0001.

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Abstract In this study, the effect of change of notch type on non-linear buckling behavior in composite plates was investigated experimentally and numerically. The composite plate is produced by applying the vacuum infusion method using carbon and aramid hybrid woven fabric and epoxy. Primarily, in the composite plates, a circular hole in the middle, a U single edge notch and semicircle double edge notches are formed. The specimens were subjected to buckling tests, being placed on their two edges, while the others were free. Afterwards, the load displacement graphs of the plates under pressure load were obtained experimentally for the behavior before and after buckling. In the numerical study, non-linear buckling analysis was performed using the finite element method. As a result, experimental and numerical buckling behaviors were obtained in accordance with each other. Since the net cross section bearing the pressure load is equal for all notch types, an effective difference between the maximum damage loads has not been achieved. So, the variation of notch type does not change the load displacement behavior characteristics of the plates after buckling. However, due to the unsymmetrical geometry in U notched plates, an uneven change in horizontal displacements along the width of the plate was achieved. The maximum stress concentration formed around the notch increased after buckling with the increase of displacement in vertical direction.

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36

Pal'chevskii, A. S. "Undirectional buckling of coiled multilayered shells." Soviet Applied Mechanics 22, no. 2 (February 1986): 152–55. http://dx.doi.org/10.1007/bf00887005.

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37

ZIAEE, S. "BUCKLING OF DEFECTIVE CARBON NANOTUBES UNDER AXIAL AND TRANSVERSE LOADS." International Journal of Applied Mechanics 06, no. 01 (February 2014): 1450004. http://dx.doi.org/10.1142/s1758825114500045.

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Elastic buckling of single walled carbon nanotubes (SWCNTs) with di-, triple- and pinhole vacancy defects under the transverse and axial compression loading is investigated based on molecular structural mechanics. In this research, the effects of length, radius, loading ratio, and the position of vacancy defect on the buckling behavior of armchair and zigzag single-walled carbon nanotubes are studied. It is found that the position of pinhole-vacancy has a significant effect on the percent of the reduction of the critical buckling force. It is also seen, that the effect of loading kind on the critical buckling forces loses its importance if the length of carbon nanotube (CNT) increases.

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38

Suemasu, Hiroshi, Takeshi Irie, and Takashi Ishikawa. "Buckling and Post-buckling Behavior if Composite Plates Containing Multiple Delaminations." Journal of Composite Materials 43, no. 2 (November 13, 2008): 191–202. http://dx.doi.org/10.1177/0021998308099217.

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39

Akbaş, Şeref Doğuşcan. "Hygrothermal Post-Buckling Analysis of Laminated Composite Beams." International Journal of Applied Mechanics 11, no. 01 (January 2019): 1950009. http://dx.doi.org/10.1142/s1758825119500091.

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The main goal in this paper is to make analysis of post-buckling of laminated composite beams under hygrothermal effect. In solution of problem, finite element method is utilized with the first shear beam theory. Total Lagrangian approach is used nonlinear kinematic relations. It is known that post-buckling problems are geometrically nonlinear problems. In nonlinear solution of problem, the Newton–Raphson method is used based on incremental displacement. The novelty in this study is to investigate the hygrothermal post-buckling analysis of laminated composite beams by using total Lagrangian nonlinear approach. The influences of temperature, moisture, fiber orientation angles, stacking sequence of laminas on post-buckling responses of composite laminated beam are illustrated and examined in numerical results. The results show that fiber orientation angles, stacking sequence of laminas play an important role in hygrothermal post-buckling responses of laminated beams. Also, comparison studies are performed with special results of published paper.

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40

Sun, Yixiao, and Zhihai Xiang. "Buckling Analyses of Spherical Shells by the Finite Element Method Based on the Willis-Form Equations." International Journal of Applied Mechanics 11, no. 09 (November 2019): 1950091. http://dx.doi.org/10.1142/s1758825119500911.

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Buckling analysis of spherical shells under external pressure is a crucial problem in mechanical and aerospace engineering. It is widely known that the buckling loads obtained by classical methods are much higher than experimental results. The main reason for this large discrepancy is customarily attributed to initial geometrical imperfections, and the impact of inhomogeneously distributed stresses during loading process is usually ignored. In order to investigate the effect of this ignored factor, the buckling loads of several spherical shells are analyzed by the geometrically nonlinear finite element method (FEM) based on the Willis-form equations, which explicitly contain the stress gradients at previous loading step. It can be shown that the buckling loads from the Willis-form FEM are about 10% lower than the values from classical FEM. This finding may give better understandings to the differences between theoretical and experimental results for nearly perfect spherical shells and may be helpful to obtain more accurate buckling loads for shells with initial geometrical imperfections.

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Choi, Sup, Jung Ju Lee, and Dong Chun Lee. "Thermal Buckling of Laminated Composite Beams with Embedded Shape Memory Alloy Actuators." Journal of Composite Materials 34, no. 18 (September 2000): 1529–47. http://dx.doi.org/10.1106/gxxu-bevy-d4u0-fy5f.

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In this paper, the thermal buckling and postbuckling behaviours of a composite beam with embedded shape memory alloy (SMA) wires are investigated experimentally and analytically. For the purpose of enhancing the critical buckling temperature and reduction of the lateral deflection on thermal buckling and postbuckling, the characteristics of thermal buckling are investigated through the use of the shape recovery force. The results of thermal buckling tests using uniformly heated and clamped composite beam specimens with embedded SMA wire actuators are discussed. The temperature-load-deflection behaviour records present quantitatively how the shape recovery force affects the thermal buckling behaviour. For this experiment, we considered the initial geometric imperfections, the slenderness ratio of the beam and the embedding position of the SMA wire actuators. The experimental results show that the shape recovery force reduces the thermal expansion of the composite laminated beam. This results in an increase of the critical buckling temperature and a reduction of the lateral deflection of the beams.

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ROY CHOWDHURY, A. N., C. M. WANG, and S. J. A. KOH. "CONTINUUM SHELL MODEL FOR BUCKLING OF ARMCHAIR CARBON NANOTUBES UNDER COMPRESSION OR TORSION." International Journal of Applied Mechanics 06, no. 01 (February 2014): 1450006. http://dx.doi.org/10.1142/s1758825114500069.

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Molecular dynamics (MD) simulations are performed using adaptive intermolecular reactive bond order potential to analyze single-walled and double-walled carbon nanotubes. These carbon nanotubes were analyzed for buckling under compression and under torsion. The MD simulations create a comprehensive database for the critical buckling loads/strains and critical buckling torques/twist angles for armchair SWCNTs and DWCNTs of varying diameters and lengths. Using MD results as a computational benchmark, an equivalent thick shell model of CNT is proposed, which is amenable for analysis using a commercially available software ABAQUS. Based on our MD results, an empirical equation that describes the size-dependent Young's modulus for a single-walled carbon nanotube is established. Buckling analysis of CNT under compression and under torsion are performed with the equivalent shell model using size-dependent Young's modulus, Poisson's ratio = 0.19 and shell thickness h = 0.066 nm. We show that the equivalent shell model gives good estimate of critical buckling load/strain and critical buckling torque with respect to the MD results. Variation of critical twist angle with length of CNT, predicted by the shell model is in good qualitative agreement with MD simulation. However, the equivalent shell model underestimates the critical twist angle by 30% because the continuum shell model overestimates torsional stiffness of CNT compared to an atomistic model of CNT. The equivalent shell model is less computational intensive to implement as compared with MD. Its accuracy for predicting the buckling states for long carbon nanotubes allows it to be used for moderately long CNTs under compression/torsion, in-lieu of MD simulations.

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Rajan, A., R. Pramanik, A. Narayanan, and A. Arockiarajan. "Mechanics of viscoelastic buckling in slender hydrogels." Materials Research Express 6, no. 5 (February 22, 2019): 055320. http://dx.doi.org/10.1088/2053-1591/ab0691.

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Mazzilli, Carlos E. N. "Buckling and post-buckling of extensible rods revisited: A multiple-scale solution." International Journal of Non-Linear Mechanics 44, no. 2 (March 2009): 200–208. http://dx.doi.org/10.1016/j.ijnonlinmec.2008.11.005.

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Jamshidi, Reihaneh, Yuanfen Chen, Kathryn White, Nicole Moehring, and Reza Montazami. "Mechanics of Interfacial Bonding in Dissimilar Soft Transient Materials and Electronics." MRS Advances 1, no. 36 (2016): 2501–11. http://dx.doi.org/10.1557/adv.2016.432.

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ABSTRACTSoft transient electronics of polymeric substrates and silver-ink electronics are studied for correlated mechanical-electrical properties. Experimental and predictive finite element analysis are used to understand, explain and predict delamination, cracking, buckling, and failure of printed conductive components of such systems. An active transient polymer system consisting of poly(vinyl alcohol) and sodium bicarbonate is introduced that results in byproducts (alkaline and bubbles) when undergoing transiency. These byproducts are facilitated to control and expedite transiency of the electronic components based on redispersion of metallic nano/micro materials. Complete mechanical and electrical characterization of such systems is reported.

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Öndürücü, Ayşe, and Hüseyin Fırat Kayıran. "Effect of seawater on the buckling behavior of hybrid composite plates." Journal of Composite Materials 53, no. 9 (August 23, 2018): 1135–44. http://dx.doi.org/10.1177/0021998318796160.

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This paper addresses the effects of different stacking sequences and seawater on the buckling behavior of hybrid composite plates. For the buckling tests, 12-layered hybrid composite plates were produced using different combinations of carbon, E-glass and aramid fibers, with an epoxy resin system as the matrix (Araldite LY1564/Aradur 3486). The hybrid composite plates were designed at the symmetric orientation angles of [(0/90)3]s, [(30/−60)3]s, [(45/−45)3]s and an anti-symmetric orientation angle of [(0/90)3]2. The hybrid composite samples were divided into groups and were subjected to buckling tests after being kept in different settings for varying periods of time (room temperature for 90 days, Black Sea water for 90 days, Mediterranean Sea water for 90 days, Mediterranean Sea water for 150 days). In light of the data obtained from the tests, the buckling behaviors of the layered hybrid composite plates were examined. The highest critical buckling load occurred in the carbon/aramid/glass (CAG) hybrid samples with the stacking sequence of [(0/90)3]s, whereas the lowest critical buckling load occurred in the carbon/aramid/glass (CAG45) hybrid samples with the stacking sequence of [(45/−45)3]s. It was observed that the critical buckling loads of the samples immersed in seawater decreased when compared to the critical buckling loads of the samples kept at room temperature. It was also found that the critical buckling loads of the hybrid samples immersed in the Mediterranean Sea water, which has high salinity, were lower than the critical buckling loads of the hybrid samples immersed in the Black Sea water, which has lower salinity.

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MIYAZAKI, Noriyuki, Seiya HAGIHARA, and Tsuyoshi MUNAKATA. "Creep buckling under varying loads." Transactions of the Japan Society of Mechanical Engineers Series A 55, no. 518 (1989): 2103–7. http://dx.doi.org/10.1299/kikaia.55.2103.

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Sun, Tuoya, Junhong Guo, and E. Pan. "Nonlocal vibration and buckling of two-dimensional layered quasicrystal nanoplates embedded in an elastic medium." Applied Mathematics and Mechanics 42, no. 8 (June 25, 2021): 1077–94. http://dx.doi.org/10.1007/s10483-021-2743-6.

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AbstractA mathematical model for nonlocal vibration and buckling of embedded two-dimensional (2D) decagonal quasicrystal (QC) layered nanoplates is proposed. The Pasternak-type foundation is used to simulate the interaction between the nanoplates and the elastic medium. The exact solutions of the nonlocal vibration frequency and buckling critical load of the 2D decagonal QC layered nanoplates are obtained by solving the eigensystem and using the propagator matrix method. The present three-dimensional (3D) exact solution can predict correctly the nature frequencies and critical loads of the nanoplates as compared with previous thin-plate and medium-thick-plate theories. Numerical examples are provided to display the effects of the quasiperiodic direction, length-to-width ratio, thickness of the nanoplates, nonlocal parameter, stacking sequence, and medium elasticity on the vibration frequency and critical buckling load of the 2D decagonal QC nanoplates. The results show that the effects of the quasiperiodic direction on the vibration frequency and critical buckling load depend on the length-to-width ratio of the nanoplates. The thickness of the nanoplate and the elasticity of the surrounding medium can be adjusted for optimal frequency and critical buckling load of the nanoplate. This feature is useful since the frequency and critical buckling load of the 2D decagonal QCs as coating materials of plate structures can now be tuned as one desire.

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Ateah, Khetam S., and Luay S. Alansari. "Studying the Critical Buckling Load of FG Beam Using ANSYS." Materials Science Forum 1039 (July 20, 2021): 7–22. http://dx.doi.org/10.4028/www.scientific.net/msf.1039.7.

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In this article, the critical buckling load of functionally graded beam is calculated using ANSYS APDL Software (version 17.2) under mechanical and thermal load. In mechanical load, the effects of length to thickness ratio, power law index and mode number on the non-dimension critical buckling load of fixed-fixed and fixed-free FG beam. The results show that the length to thickness ratio is not effect on the non-dimension critical buckling load while the power law index and mode number effect on the non-dimension critical buckling load. In thermal load, the critical buckling load for fixed-fixed and pinned-pinned FG beam depend on length to thickness ratio, power law index and mode number. The results show that the critical buckling load increases with decreasing length to thickness ratio.

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URUSHIYAMA, Yuta, David LEWINNEK, Jinhao QIU, and Junji TANI. "Buckling of Shape Memory Alloy Columns. 2nd Report. Anti-Buckling Effect of Straight Columns." Transactions of the Japan Society of Mechanical Engineers Series A 68, no. 675 (2002): 1636–42. http://dx.doi.org/10.1299/kikaia.68.1636.

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