Academic literature on the topic 'Unidirectional composites; Compression testing'

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Journal articles on the topic "Unidirectional composites; Compression testing"

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Liu, Fang, Shiqiang Deng, and Jianing Zhang. "Mechanical Properties of Epoxy and Its Carbon Fiber Composites Modified by Nanoparticles." Journal of Nanomaterials 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8146248.

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Compressive properties are commonly weak parts in structural application of fiber composites. Matrix modification may provide an effective way to improve compressive performance of the composites. In this work, the compressive property of epoxies (usually as matrices of fiber composites) modified by different types of nanoparticles was firstly investigated for the following study on the compressive property of carbon fiber reinforced epoxy composites. Carbon fiber/epoxy composites were fabricated by vacuum assisted resin infusion molding (VARIM) technique using stitched unidirectional carbon f
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Wang, J., Y. Xiao, M. Kawai, and K. Inoue. "Observation and modeling of loading–unloading hysteresis behavior of unidirectional composites in compression." Journal of Reinforced Plastics and Composites 37, no. 5 (2017): 287–99. http://dx.doi.org/10.1177/0731684417743347.

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The loading–unloading hysteresis behavior of unidirectional HTS40/PA6 carbon/polyamide laminates under off-axis compression has been examined both experimentally and constitutively in the present study. Monotonic compressive tests are first performed on unidirectional laminates to identify the basic properties of off-axis deformation. Then, five cycles of compressive loading and unloading tests are carried out with a gradually increasing peak stress for each specimen, followed by testing to failure. Significant nonlinear unloading behavior is observed after the material has been loaded into th
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Johnson, WS, JE Masters, DW Wilson, JS Welsh, and DF Adams. "Unidirectional Composite Compression Strengths Obtained by Testing Cross-Ply Laminates." Journal of Composites Technology and Research 18, no. 4 (1996): 241. http://dx.doi.org/10.1520/ctr10109j.

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Dutta, P. K. "Low-Temperature Compressive Strength of Glass-Fiber-Reinforced Polymer Composites." Journal of Offshore Mechanics and Arctic Engineering 116, no. 3 (1994): 167–72. http://dx.doi.org/10.1115/1.2920146.

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Polymeric composites are relatively inexpensive materials of high strength, in which deformation of the matrix is used to transfer stress by means of shear traction at the fiber-matrix interface to the embedded high-strength fibers. At low temperatures, complex stresses are set up within the microstructure of the material as a result of matrix stiffening and mismatch of thermal expansion coefficients of the constituents of the composites. These stresses in turn affect the strength and deformation characteristics of the composites. This is demonstrated by compression testing of an unidirectiona
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Xiao, Y., M. Kawai, and H. Hatta. "An integrated method for off-axis tension and compression testing of unidirectional composites." Journal of Composite Materials 45, no. 6 (2010): 657–69. http://dx.doi.org/10.1177/0021998310377936.

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This study presents an integrated method suitable for off-axis tension and compression testing in unidirectional composites, and its application to the testing of in-plane shear characterization. A new rotating-grip test fixture, incorporating the attractive features of the existing pinned-end fixture and hydraulic wedge grips, has been developed. The proposed gripping system consists of two sets of jaw faces, each with a pair of self-aligning bearings that allows for loading in the axial and radial directions. Finite element analysis and experiments were performed to evaluate the effectivenes
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Mrse, A. M., and M. R. Piggott. "Compressive properties of unidirectional carbon fibre laminates: I. A compact flexure beam for compression testing." Composites Science and Technology 46, no. 3 (1993): 213–17. http://dx.doi.org/10.1016/0266-3538(93)90155-a.

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Sapiai, Napisah, Aidah Jumahat, Mohammad Jawaid, and Anish Khan. "Effect of MWCNT Surface Functionalisation and Distribution on Compressive Properties of Kenaf and Hybrid Kenaf/Glass Fibres Reinforced Polymer Composites." Polymers 12, no. 11 (2020): 2522. http://dx.doi.org/10.3390/polym12112522.

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The aim of this study is to evaluate the effect of surface treated multi wall carbon nanotubes (MWCNTs) on compressive properties of the unidirectional (UD) kenaf and hybrid woven glass/UD kenaf fibre reinforced polymer composites. The MWCNTs were first treated using concentrated acid (a mix of H2SO4 and HNO3) and silane (three-aminoprophyltriethoxysilane) in order to improve the dispersion within the epoxy matrix using a high shear roll milling technique. In this study, nanomodified epoxies were prepared using 0.5, 0.75 and 1.0 wt % of pristine MWCNT (PCNT), acid treated MWCNT (ACNT) and sila
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Hamid, Sami, and Abhishek Thakur. "Investigating Mechanical Properties of Carbon Glass Jute Fiber based Composite." Journal of University of Shanghai for Science and Technology 23, no. 06 (2021): 923–31. http://dx.doi.org/10.51201/jusst/21/05346.

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Hybrid composites are made by combining natural and synthetic fibers with an effective matrix, which usually means they’ve received additional strengthening, such as epoxy, to create the additional material properties you can’t obtain on their own. To attain the desirable tensile modulus, compressive modulus, and so on, a fiber composite needs to be added to the FRP (Fiber Reinforced Polymer). Polymer matrix composites are light and cost-effective to manufacture, but they still friendly to the environment and have viable applications, which is why they are often used in various commercial appl
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Hosur, M. V., S. M. Waliul Islam, U. K. Vaidya, P. K. Dutta, and S. Jeelani. "Effects of Temperature and Moisture on the High Strain Rate Compression Response of Graphite/Epoxy Composites." Journal of Engineering Materials and Technology 125, no. 4 (2003): 394–401. http://dx.doi.org/10.1115/1.1605113.

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Experimental investigations were carried out on unidirectional Graphite/Epoxy laminate samples under dynamic compression loading using a modified Split Hopkinson Pressure Bar. High strain rate testing was carried out at room and elevated temperatures. 30 layered graphite/epoxy unidirectional laminates made using DA 4518U unidirectional prepregs system were fabricated. Tests were carried out on samples at room, 51.7°C, 121.1°C, and 190.6°C temperatures. Additional high strain rate tests were conducted on samples that were subjected to moist/freeze conditioning for 42 days. Failure modes were st
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Welsh, Jeffry S., and Donald F. Adams. "Testing of angle-ply laminates to obtain unidirectional composite compression strengths." Composites Part A: Applied Science and Manufacturing 28, no. 4 (1997): 387–96. http://dx.doi.org/10.1016/s1359-835x(96)00138-8.

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Dissertations / Theses on the topic "Unidirectional composites; Compression testing"

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Haberle, Jurgen. "Strength and failure mechanisms of unidirectional carbon fibre-reinforced plastics under axial compression." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/11390.

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Hahn, Steven Eric. "An experimental/analytical investigation of combined shear/end loaded compression strength testing of unidirectional composites." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12232009-020534/.

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Malik, Basharat U. "Fatigue delamination growth under cyclic compression in unidirectional composites." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/12094.

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Milette, Jean-François. "Static and fatigue behaviour of unidirectional composites in compression." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23266.

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In this research, the test methods and specimen configurations are studied for both static and fatigue characterization of composite materials in compression, using carbon/epoxy as an example. A new test method was developed to allow for both static and compression fatigue testing. Finite element analyses were performed to analyze the effect of Teflon inserts between the tabs and specimen on the stress distribution in the specimen. The test uses a conventional material testing machine equipped with hydraulic grips. No fixture was needed to test the specimen, which is an important advantage esp
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Lin, Mark Wen-Yih. "Elastoplastic response of unidirectional graphite/aluminum under combined tension-compression cyclic loading." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45812.

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<p>A test fixture for combined tension-compression cyclic testing of unidirectional composites was designed and characterized using 606l-O aluminum specimens. The elastoplastic response of graphite/aluminum l5° off-axis and 90° specimens under tension-compression cyclic loading was subsequently investigated at three temperatures, -l50°F, room temperature and 250°F. The test results showed that the tensile response was predominantly elastoplastic, whereas the compressive response could not be characterized exclusively on the basis of the classical plasticity theory. Secondary dissipat
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Wanner, Svenja. "Systematic approach on conducting fatigue testing of unidirectional continuous carbon fibre composites." Thesis, KTH, Lättkonstruktioner, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261694.

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High fuel saving potentials, increased load carrying capacities and therefore competitive advantages force the heavy goods vehicle industry to enhance the efforts towards comprehensive lightweight designs. Facing this challenge, the material evaluation in terms of simulations and physical testing of composite materials is required for the design against fatigue failure due to road introduced vibrations. Eliminating fatigue testing issues in order to gain acceptable and reproducible results, a future-oriented systematic approach on conducting constant amplitude tension-tension fatigue testing o
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Barbe, Andre. "A critical assessment of crack growth criteria in unidirectional composites." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90908.

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The problem examined is an infinite anisotropic layer with a through crack at arbitrary orientation, subjected to uniform in-plane remote loading. The purpose of this study is to gain a better understanding of several theoretical models for predicting the direction of crack propagation and the level of load causing crack extension, and to present a new model for predicting the critical load. The discussed models are particularly examined in detail with regard to the physical parameters affecting the results. Comparison is made with available experimental results. It is shown that the normal st
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Becker, Wolfgang. "Mechanical response of unidirectional Boron/Aluminum under combined loading." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/91079.

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Three test methods were employed to characterize the response of unidirectional Boron/Aluminum metal matrix composite material under monotonic and cyclic loading conditions, namely: Iosipescu Shear, Off-Axis Tension and Compression. The characterization of the elastic and plastic response includes the elastic material properties, yielding and subsequent hardening of the unidirectional composite under different stress ratios in the material principal coordinate system. The elastic response is compared with the prediction of the transformation theory, based on the far field stress ōₓₓ, the Pagan
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Allen, Devin Nelson. "Damage Tolerance of Unidirectional Basalt/Epoxy Composites In Co-Cured Aramid Sleeves." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/3158.

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Unidirectional basalt fiber rods consolidated with an aramid sleeve were measured for compression strength after impact at various energy levels and compared to undamaged control specimens. These structural elements represent local members of open three-dimensional composite lattice structures (e.g., based on isogrid or IsoTruss® technologies) that are continuously fabricated using advanced three-dimensional braiding techniques. The unidirectional core specimens, nominally 8 mm (5/16") and 11 mm (7/16") in diameter, were manufactured using bi-directional braided sleeves or unidirectional spira
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Sika, Charles Andrew. "Damage Tolerance of Unidirectional Carbon and Fiberglass Composites with Aramid Sleeves." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3431.

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Unidirectional carbon fiber and fiberglass epoxy composite elements consolidated with aramid sleeves were radially impacted at 5 J (3.7 ft-lbs) and 10 J (7.4 ft-lbs), tested under compression, and compared to undamaged control specimens. These structural elements represent local members of open three-dimensional composite lattice structures (e.g., based on isogrid or IsoTruss® technologies). Advanced three-dimensional braiding techniques were used to continuously fabricate these specimens. The unidirectional core specimens, 8 mm (5/16 in) in diameter, were manufactured with various sleeve patt
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Books on the topic "Unidirectional composites; Compression testing"

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H, Williams James. Wave propagation in anisotropic medium due to an oscillatory point source with application to unidirectional composites. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Masters, John E. Standard test methods for textile composites. National Aeronautics and Space Administration, 1996.

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Masters, John E. Standard test methods for textile composites. National Aeronautics and Space Administration, Langley Research Center, 1996.

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Hyer, M. W. Innovative design of composite structures: Design, manufacturing, and testing of plates utilitzing [sic] curvilinear fiber trajectories : final report for NASA. College of Engineering, Virginia Polytechnic Institute and State University ; Hampton, VA, 1994.

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Hyer, M. W. Innovative design of composite structures: Axisymmetric deformations of unsymmetrically laminated cylinders loaded in axial compression : semiannual status report. College of Engineering, Virginia Polytechnic Institute and State University, 1990.

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Hyer, M. W. Innovative design of composite structures: Further studies in the use of a curvilinear fiber format to improve structural efficiency. College of Engineering, Virginia Polytechnic Institute and State University, 1988.

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Hyer, M. W. Innovative design of composite structures: The use of curvilinear fiber format to improve buckling resistance of composite plates with central circular holes. College of Engineering, Virginia Polytechnic Institute and State University, 1990.

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Hyer, M. W. Innovative design of composite structures: The use of curvilinear fiber format in composite structure design. College of Engineering, Virginia Polytechnic Institute and State University, 1990.

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Hyer, M. W. Innovative design of composite structures: The use of curvilinear fiber format to improve buckling resistance of composite plates with central circular holes. College of Engineering, Virginia Polytechnic Institute and State University, 1990.

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C, Marques Elizabeth R., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Massachusetts Institute of Technology. Dept. of Mechanical Engineering, and Lewis Research Center, eds. Parameterized materials and dynamic response characterizations in unidirectional composites. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Book chapters on the topic "Unidirectional composites; Compression testing"

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Quick, Torin, Sirina Safriet, David Mollenhauer, Chad Ryther, and Robert Wheeler. "Compression Testing of Micro-Scale Unidirectional Polymer Matrix Composites." In Fracture, Fatigue, Failure and Damage Evolution, Volume 8. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21611-9_28.

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Akbarov, S. D., and A. N. Guz. "Viscoelastic Unidirectional Composites in Compression." In Mechanics of Curved Composites. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-9504-4_12.

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Guz, A. N. "Plastic Failure of Unidirectional Fibrous Composite Materials with Metal Matrix in Compression." In Mechanical Identification of Composites. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3658-7_32.

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Matthews, F. "Compression." In Mechanical Testing of Advanced Fibre Composites. CRC Press, 2000. http://dx.doi.org/10.1201/9781439822791.ch5.

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Matthews, F. L. "Compression." In Mechanical Testing of Advanced Fibre Composites. Elsevier, 2000. http://dx.doi.org/10.1533/9781855738911.75.

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Lopes, Cláudio S., David Garoz Gómez, Olben Falcó, and Bas H. A. H. Tijs. "Stochastic virtual testing laboratory for unidirectional composite coupons: from conventional to dispersed-ply laminates." In Multi-Scale Continuum Mechanics Modelling of Fibre-Reinforced Polymer Composites. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-818984-9.00019-6.

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Peters, S. T. "Static Mechanical Tests for Filament-Wound Composites." In Composite Filament Winding. ASM International, 2011. http://dx.doi.org/10.31399/asm.tb.cfw.t52860095.

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Abstract The objective of mechanical testing of an engineered material is to provide data necessary for the analysis, design, and fabrication of structural components using the material. The testing of filament-wound composite materials offers unique challenges because of the special characteristics of composites. This chapter describes suitable static mechanical test techniques for characterizing laminated composite materials. The approach is to provide recommended techniques, based on consensus opinions of fabricators and users of filament-wound composites, and to survey available techniques that have been used successfully in the field. The chapter describes the effects of various factors on the properties of composite constituents, including fibers, resins, and unidirectional plies. Some aspects of specimen selection are also described. The chapter provides information on pressure bottles and tubular parts that have been developed as standard test specimens for combined load testing of composites.
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Ba, Abdoulaye, Qiuji Yi, Junzhen Zhu, et al. "Impact Damages Detection on CFRP Using Eddy Current Pulsed Thermography." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2020. http://dx.doi.org/10.3233/saem200025.

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Carbon Fiber Reinforced Polymer (CFRP) materials are widely used in aerospace due to their low weigh to strength ratio. Non-destructive Testing (NDT) Techniques becomes a necessity with increasing use of CFRP materials. Induction Thermography is a new NDT technique that can be exploited as a promising fast and global control. However, the detection of typical flaws in carbon composites such as delamination, fibers rupture and impact damages need to be further investigated in order to optimize the technique. Optimization can be done in the test configuration level and by the use an appropriate image technique. In this paper Eddy Current Pulse Compression Thermography (ECPuCT) is used to detect impact damages on CFRP materials. The Principal Component Analysis (PCA) based image processing technique is used to detect and visualize impact damage area from transient thermal images. Flaw detection results using experimental measures will be shown and discussed.
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Conference papers on the topic "Unidirectional composites; Compression testing"

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Miller, David A., John F. Mandell, and Daniel D. Samborsky. "Evaluating Performance of Composite Materials for MHK Applications." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62768.

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Montana State University (MSU) has a compilation of material systems, environmental chambers, and mechanical testing equipment to determine composite materials performance and failure characteristics. Mechanical characterization of composite systems will provide direct quantification of the materials under consideration for Marine Hydro Kinetic (MHK) designs that were initially developed for the wind turbine industry. The work presented herein represents the testing protocol development and initial results to support investigations on the effect of sea water absorption on material strength. A
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SUWARTA, PUTU, GERGELY CZEL, MOHAMAD FOTOUHI, JAKUB RYCERZ, and MICHAEL WISNOM. "Pseudo-ductility of Unidirectional Thin Ply Hybrid Composites in Longitudinal Compression." In American Society for Composites 2018. DEStech Publications, Inc., 2018. http://dx.doi.org/10.12783/asc33/25987.

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JR., JOHN GILLESPIE, MOLLA ALI, CHIAN YEN, DANIEL O’BRIEN, and BAZLE (GAMA) HAQUE. "Micro Punch Shear Testing of Unidirectional Composites: A New Test Method." In American Society for Composites 2018. DEStech Publications, Inc., 2018. http://dx.doi.org/10.12783/asc33/25916.

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Safdar, N., B. Daum, S. Scheffler, and R. Rolfes. "Probabilistic Failure Prediction under Combined in-plane Compression-Shear Loading for Unidirectional Fiber Reinforced Composites." In VIII Conference on Mechanical Response of Composites. CIMNE, 2021. http://dx.doi.org/10.23967/composites.2021.049.

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AFFUL, HENRY QUANSAH, SAMUEL IBEKWE, PATRICK MENSAH, and GUOQIANG LI. "Effect of Uniaxial Compression on the Shape Memory Behavior of Unidirectional Vitrimer Composite Embedded with Shape Memory Polymer Fibers." In American Society for Composites 2020. DEStech Publications, Inc., 2020. http://dx.doi.org/10.12783/asc35/34916.

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Chiu, Po-Hsun, Chien-Wei Lee, and Vitali F. Nesterenko. "Processing and dynamic testing of Al/W granular composites." In SHOCK COMPRESSION OF CONDENSED MATTER - 2011: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2012. http://dx.doi.org/10.1063/1.3686384.

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Preissner, Eric, Eyassu Woldesenbet, Jack Vinson, Eric Preissner, Eyassu Woldesenbet, and Jack Vinson. "High strain rate compression testing of K-49/3501-6 Kevlar/epoxy composites." In 38th Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1047.

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Li, Longbiao. "Micromechanical Modeling Tension-Compression Fatigue Hysteresis Loops Model of Fiber-Reinforced Ceramic-Matrix Composites Considering Fibers Failure." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58485.

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Abstract In this paper, a micromechanical tension-compression fatigue hysteresis loops model of fiber-reinforced ceramic-matrix composite (CMC) was developed considering fibers failure. Multiple fatigue damage mechanisms of fibers failure, interface debonding, slip and wear, and matrix fragmentation were considered and incorporated in the micromechanical fatigue hysteresis loops model. Upon unloading, the unloading stress-strain relationship was divided into three stages, including, (1) Unloading Stage I: the unloading interface counter slip stage and the unloading stress is between the tensil
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Yasuda, Nathan K., David S. Schulman, David J. Traina, et al. "Investigation of Energy Absorption Characteristic of Ceramic Fiber Reinforced Elastomer Composites." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72103.

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Head protection from impact events for participants in contact sports or other activities is of current interest. Custom designed and synthesized material systems which effectively reduce the peak force transmitted to the individual and absorb a substantial portion of the impact energy are highly desirable. In applications in which recovery time of the material is not a primary concern, multiple means of energy absorption, including deformation and fracturing of the reinforcement material, may be suitable. In the present study, new composite material systems using a urethane elastomer matrix r
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Thakre, Piyush R., and Dimitris C. Lagoudas. "Multifunctional Multi-Scale Carbon-Fiber/Epoxy Matrix Composites Reinforced With Carbon Nanotubes." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1483.

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In the present work, apart from developing a processing method for multi-scale laminates, characterization efforts are focused on finding longitudinal, transverse and in-plane shear modulus using flexure and in-plane shear testing of unidirectional, [0°]10, and multidirectional, [±45°]2s, laminates. A comparison of the above mentioned macroscale properties is presented for three types of composites, i.e., composites embedded with functionalized nanotubes, un-functionalized or pristine nanotubes and base composite without nanotubes. Classical laminate theory is used to model a representative la
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Reports on the topic "Unidirectional composites; Compression testing"

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Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski, and Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40683.

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A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and b
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