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Development and Mechanical Characterization of Coir Fiber-Based Thermoplastic Polyurethane Composite
Published in Atul Babbar, Ranvijay Kumar, Vikas Dhawan, Nishant Ranjan, Ankit Sharma, Additive Manufacturing of Polymers for Tissue Engineering, 2023
Jaspreet Kaur, Dharmpal Deepak, Harnam Singh Farwaha, Sulakshna Dwivedi, Nishant Ranjan
There are five types of composite materials:Fiber compositeParticle compositeFlake compositeLaminar compositeFilled composite
Woven Fabrics and Composite Laminates for Armour Applications
Published in Paul J. Hazell, Armour, 2023
A composite is a material that is made up of two or more discrete materials that are combined together in such a way to achieve desirable properties. There are several types of composite materials including natural and engineered composites. Commonly, the composite will consist of a matrix material and some kind of reinforcement. Composite materials are now used in an increasing number of applications ranging from sporting gear to telegraph poles. Rigid composite materials have also found their way into protective structures such as in armoured vehicles.
Emerging Materials in Polymer Reinforcement
Published in Sefiu Adekunle Bello, Hybrid Polymeric Nanocomposites from Agricultural Waste, 2023
Sefiu Adekunle Bello, Luqman Babatunde Eleburuike, Lanre Ademola Adams, Damilola Bukola Kolawole, Maruf Yinka Kolawole, Emmanuel Kwesi Artur, Farasat Iqbal
Fibre-reinforced polymers are composite materials that contain polymer matrix and fibre reinforcement. Examples of the polymer matrix commonly used in the composite system include the epoxies, phenol resins, polyester plastics, and polyamides. Also, glass, carbon and aramid fibres are the most common examples of fibre reinforcements. Fibre-reinforced composites have become increasingly important in recent years due to their significant improvement in materials properties [3]. Their application ranges are broad, and they are utilised in almost every modern engineering industry. They are used in the fabrication of spacecrafts, construction of buildings and bridges, boats, vehicles, and other things. Scientists have developed innovative methods for reinforcing polymers with fibres such as cylindrical carbon nanotubes and nanoparticles with sizes ranging from 1 to 100 nanometers over the years [3]. Fibre reinforcement in polymer materials helps in improving the tensile strength, wear properties, thermal stability, and resistance to corrosion of materials [3].
Preparation and characterization of UHMWPE reinforced with polyester fibers for artificial cervical disc replacement (ACDR)
Published in Journal of Biomaterials Science, Polymer Edition, 2023
Massar Najim Obaid, Nardeen Adnan Berto, Safaa Hashim Radhi
Tensile tests are used to determine tensile strength, elastic modulus, and elongation of composite materials. The samples of test was cut according to ASTM D 638-03 and the test is carry out at a strain rate of 5 mm/min and the load was increased continuously until the sample is failed [12]. Three samples were tested every time and the mechanical properties (tensile strength, elastic modulus, and elongation) are the average of data for three samples. A flexural test is used to detect the behavior of the prepared composite regarding the uniform dispersion of the deformation within the sample. The test is conducted according to ASTM D790 [13] the sample dimensions (100 × 10 × 4) mm. the test (three point - type) is achieved after support the ends of sample the loud applied at midpoint at strain rate 5 mm/min. also The three sample are tested each time. Compression strength is detected by conducting a compression test according to ASTM D695-02a [14] the test is achieved at velocity 1.3 mm/min and the load applied until the sample is failed. The data of stress-strain are obtained. The three sample are tested each time
Reliability-based first-ply failure envelopes of composite tubes subjected to combined axial and torsional loadings
Published in Mechanics Based Design of Structures and Machines, 2023
Rajamohan Ganesan, Ajeesh Suresh Nair
Composite tubes are used in a wide range of applications in the automobile, mechanical, and aerospace industries. Composite materials have the advantages of being lightweight, fatigue-resistant, corrosion-resistant, and having high strength-to-weight and stiffness-to-weight ratios compared to metals, which make composite materials a better alternative for metals in such applications. In engineering practice, composite tubes are subjected to axial, torsional, and bending in-service loadings. Derisi et al. (2011) studied the mechanical behavior of composite tubes subjected to bending loading. Mamalis et al. (2005) experimentally investigated the mechanical response of the composite tubes subjected to axial load. In practical applications, composite tubes are often subjected to the combination of two or more loadings. Lee et al. (1999) investigated the mechanical behavior of the composite tubes subjected to the extension-twist coupling. Jonnalagadda et al. (2015) studied the mechanical behavior of the composite tube subjected to the bend-twist coupling effects. In many engineering applications, the composite tubes are subjected to combined axial and torsional loadings. In this regard, the study of the mechanical behavior and failure of the composite tubes subjected to combined axial and torsional loadings is of considerable interest.
Lamb mode and damage identification using small-sample dictionary algorithm
Published in Nondestructive Testing and Evaluation, 2023
Composite laminated structure is composed of multi-layer materials, such as metal, non-metallic or composite materials. The integrated component, formed by special processes between layers, can enhance other physical properties besides the raw properties, such as electrical, magnetic, acoustic, thermal and others. Due to the excellent characteristics of designable structure, composite laminated structures are widely used in aerospace, machinery manufacturing, medical devices, chemical equipment. Benefited from the excellent performance of high attenuation and high sensitivity, diagnostic Lamb waves have been considered as an efficient approach of non-destructive testing, especially for plate-like structures in aircraft, ship, pressure vessel, and etc [1–3]. However, a received signal is always the superposition of the direct waves from the actuator, the scattered waves and the new converted modes from the damage, the reflected waves from the boundary, and other interference noise. Because of the co-existence of multiple modes and wave dispersion, Lamb waves are prone to overlapping in the time and frequency domain as propagation distances increase, which result in complexity of signal interpretation, efficient implementation of damage identification.