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This study investigated the effect of two-dimensional fabric weaves (plain, twill,
and satin) on the vibrational characteristics (natural frequency and damping) of
woven carbon/epoxy composites. Natural frequencies of woven composites
were measured by experimental modal analysis for plain weave, twill weave,
and satin weave composites. The experime...
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Citations
... He observed a stiffer interfacial zone caused by fiber/ matrix interaction when the glass transition temperature increased. Some scientific studies regarding the comparison of the different fabric weave effects on the dynamic response of fiber-reinforced composites are seen in the literature (Rouf et al. 2017;Song et al. 2012). Song et al. (2012) examined the visco-elastic behavior of hemp fiberreinforced composites having different weave types as plain, twill, and satin. ...
... This was attributed to the twill weave's structural arrangement and closer packing. Rouf et al. (2017) researched the effect of fabric weaves (plain, twill, and satin) on the dynamic response of two-dimensional fiberreinforced composites. The results indicated that a higher flexural loss factor was obtained from plain weave composites when compared to satin weave composites. ...
The current work aimed at investigating experimentally the weave pattern effects on the mechanical and dynamic behaviors of polymer matrix composite laminates. The laminates composed of three different weave types (plain, satin, and twill) of woven glass fabric and STR Medapoxy epoxy resin were fabricated via vacuum molding. Static bending experiments were applied to determine the influence of the weave pattern on the mechanical characteristics of the samples. The failure behaviors of the samples were also examined by optical and Scanning Electron Microscopy (SEM) analyses. Additionally, Dynamic Mechanical Analysis (DMA) in the temperature range of 25–200 °C at 1 Hz frequency was conducted to investigate the dynamic characteristics of the samples. It was found that the samples having satin weave type had the best flexural modulus followed by the plain and twill weaves. However, the twill weave laminates exhibited better storage modulus at glass transition temperature values (T g) compared to the others. Also, an increase of 3.3 °C in glass transition temperature was observed compared to that of neat resin. This was attributed to the better fiber/matrix adhesion and the lower molecular mobility in the polymer chain by the addition of glass twill fibers.
... In plain and twill structures, the binding points are more, making the structure hard and stiff and breaking quickly during loading . 63 In the 3D weave structure, there is an extra set of fibres in the through-thickness direction, which binds all layers together, provides strength in the thickness direction, and shows excellent performance properties compared to 2D fabrics. 3D reinforced laminates have higher delamination resistance than 2D, making them preferable for high impact and ballistic applications . ...
Composite holds great promise for future materials considering its advantages such as excellent strength, stiffness, lightweight, and cost-effectiveness. Due to rising environmental concerns, the research speed gradually changes from synthetic polymer composites to natural fibre reinforced polymer composites (NFRPCs). Natural fibres are believed a valuable and robust replacement to synthetic silicates and carbon-based fibres, along with biodegradability, recyclability, low cost, and eco-friendliness. But the incompatibility between natural fibre and polymer matrices and higher moisture absorption percentage of natural fibre limitise their applications. To overcome these flaws, surface treatment of natural fibre and nanofiller addition have become some of the most important aspects to improve the performance of NFRPCs. This review article provides the most recent development on the effect of different nanofiller addition and surface treatment on the mechanical, thermal, and wetting behaviour of NFRPCs. It concludes that the fibre surface treatment and nanofillers in natural fibre polymer composites positively affect mechanical, thermal and water absorption properties. A systematic understanding in this field covers advanced research basics to stimulate investigation for fabricating NFRPCs with excellent performance.
... The free vibration behavior of woven reinforced materials improves the natural frequency of the composite material [109,110]. Rouf [111] analyzed the influence of plain, twill, and satin weaving patterns on the dynamic behavior of woven fabric composites. The author found that plain weave increased the damping properties of composites more than satin composites. ...
The main objective of this study is to examine the impact of reinforcements on the strength of natural fiber composites. Recent advancements in natural fiber composites have minimized the usage of man-made fibers, especially in the field of structural applications such as aircraft stiffeners and rotor blades. However, large variations in the strength and modulus of natural fiber degrade the properties of the composites and lower the safety level of the structures under dynamic load. Without compromising the safety of the composite structure, it is significant to enrich the strength and modulus of natural fiber reinforcement for real-time applications. The strength and durability of natural fiber can be enriched by reinforcing natural fiber. The reinforcement effect on natural fiber in their woven, braided, and knit forms enhances their structural properties. It improves the properties of natural fiber composites related to reinforcement with short and random-orientation fibers. The article also reviews the effect of the hybridization of natural fiber with cellulosic fiber, synthetic fiber, and intra-ply hybridization on its mechanical properties, dynamic mechanical properties, and free vibration characteristics, which are important for predicting the life and performance of natural fiber composites for weight-sensitive applications under dynamic load.
Keywords: natural fiber composite; woven natural fiber; orientation; mechanical; dynamic mechanical; vibration
... The free vibration behavior of woven reinforced materials improves the natural frequency of the composite material [109,110]. Rouf [111] analyzed the influence of plain, twill, and satin weaving patterns on the dynamic behavior of woven fabric composites. The author found that plain weave increased the damping properties of composites more than satin composites. ...
... Moreover, the individual damping of each of the composite constituents (reinforcement and matrix) results in a compound effect each part contributing. The control of vibrations and noise in structures can be achieved by using active or passive damping systems, as in Rouf et al. 2 and Berthelot and Sefrani. 3 Anyway, for dynamic loadings, damping ratio measurements are essential for performance control and structural safety. An initial damping estimation can be obtained, in some cases, by the rule of mixtures (Reuss 4 ), taking into account the stiffness, fiber orientations, and ply sequence. ...
The aim of this work is the evaluation of damping ratio in composite materials with orthogonal fiber orientation based on experimental and numerical techniques. In this study, the logarithmic decrement and the envelope techniques calculated using Hilbert transform are used. Carbon fiber/epoxy composites manufactured by filament winding are dynamically tested in free vibration. Post-processing and data analysis are performed with the developed codes. These comprise the use of a band-pass filter to isolate the first fundamental frequency from the other modes of vibration and noise present in the acquired signal. Then, the Hilbert transform is used to estimate the envelope of the vibration signal and the exponential curve is adjusted to obtain the envelope, in order to evaluate the structural damping ratio. Comparisons with a fitted finite element model are used for validation. The results revealed that damping varied proportionally with the number of layers, the ply orientation and, less evidently, with the length of the samples.
... When woven reinforcements are considered, most of the authors report a reduction of damping level compared to unidirectional reinforcements (UD) in transverse direction such as tapes [27,47,[98][99][100]. Among the different weave patterns investigated, the loss factor in huckaback-type woven composites is found to be higher than that of plain, satin, twill, and basket because their performances depend on the interlace between the warp and weft directions, which increases the interaction between fiber and matrix [101]. ...
This paper reviews the damping characteristics of plant fiber composites (PFCs) with particular attention regarding their performance with respect to that of synthetic fiber composites (SFCs). Indeed, PFCs have become increasingly popular in many application fields. Their specific characteristics when compared to those of synthetic fibers, such as glass fibers, make them good candidates to improve the damping behavior of composite materials and structures. The influences of mesoscale and microscale parameters as well as surrounding conditions are reviewed in the present paper. Contradictory reports are sometimes found, and the existing knowledge on the damping behavior of PFCs is sometimes deficient or ambiguous. Some key points, such as the variability, hierarchical aspects and sensitivity of mechanical properties, are thus discussed. This review provides a first reference for the factors that affect damping properties in PFCs to be used in engineering applications in various fields, including automotive parts, aerospace components, and musical instruments. It also highlights the current shortcomings of knowledge on the damping of PFCs. The Ashby diagram presented here, built from data available in the literature, constitutes a first tool for selecting materials considering the compromise between the loss factor and stiffness for engineering design considerations.
... 2D woven fabric is important for its lightweight, low cost, and impact damage resistance. However, during interlacement, the float and crimp of both warp and filling yarn affect the mechanical performance of 2D woven structures [4]. ...
Fiber-reinforced polymer (FRP) composite has become one of the most important applications in the aerospace industry. More than 50% of the streamlined fuselage is made of composite material, and this will continue further due to technological advancement in the field of fiber-reinforced polymer composite material. Natural fiber (Bast, Stem, Leaf) are the most focusing in today’s era due to their environment-friendly nature. The development of 2D woven Biotex flax/PLA fiber-reinforced polymer composite integrated with alumina nano-filler is the main objective of the current study. This study mainly discussed the effect of alumina nanofiller using four concentrations from 0 to 3 wt% on the tensile and impact properties of sodium hydroxide treated and untreated biotex flax/PLA fiber-reinforced composite. The results exhibit that the increase in filler loading has improved tensile and impact properties. At 2 wt% filler loading, the tensile strength and impact strength was maximum. Further, increase the filler contents have adverse effects on mechanical properties. The results have witnessed better mechanical properties of treated compared to untreated reinforcement.
... Recently, developments in carbon fiber composite material resulted in a variety of fiber architecture and incorporation of micro/nano carbon tubes in composite material enhanced the mechanical properties without affecting the dynamic properties. Rouf et al. (2017) experimentally and numerically performed vibration analysis of different textile 2D woven fabric composite (plain, twill and satin) and identified that satin woven composite has higher natural frequencies than twill and plain. Higher damping value was also observed for plain woven composite than satin and twill. ...
Enhancing mechanical properties and suppressing vibration are important requisites in developing composite material for dynamic structural applications such as automotive and aircraft. In this present work, mechanical and vibrational properties of twill woven CFRP composite fabricated by compression molding process, are studied by varying tow sizes (3k and 6k). Density, void, tensile, bending, impact strength, hardness, and free vibration tests were conducted as per ASTM standards to study their properties and investigate the impact of tow sizes on composites. In experimental modal analysis, Frequency Response Function (FRF) plots were also recorded. Scanning Electron Microscope (SEM) was used to analyse the fracture behavior of the composites. A comparison between the observed results of 3k and 6k twills are made and discussed in detail. From the experimental investigation, it is found that higher tow size decreases the tensile, flexural and hardness strength but increases the natural frequency and damping coefficient. Interfacial bonding between fiber and matrix was affected by the presence of voids in composites as evident from SEM micrographs.
... Static characteristics are of the same importance as dynamic ones. The experimental testing is supported by damping modeling using a finite element analysis evaluating different energies dissipated in material directions of layers [1,2]. It is stated that the damping of composite materials can be several orders of magnitude higher than that of traditional engineering materials, making them appealing also for components undergoing dynamic loading. ...
The paper deals with relation between inner structure of the machine and the composite material used in it and macroscopic dynamic response. It presents the experimental results of testing the relation between inner composite material structure and damping properties presented by logarithmic decrement quantity. Moreover, the paper provides the case study of application the composite material layered structure to the flexographic printing machine and results of that applications presented by printing speed.
... Unlike the geometric Modeling technique [29][30][31] which models the yarn weaving and the surrounding matrix explicitly, the damage model employed in this study assumes homogenized composite ply where fiber rupture in the tows, matrix micro-cracks and other inelastic effects are assumed to be smeared over the volume of the element. Explicit modeling of meso-scale features is computationally intensive and normally used for representative volume element (RVE) and homogenization studies of the effects of composite architecture on macroscopic material properties [32,33]. The CDM is comparatively computational efficient, and hence adopted for the structural analysis in this study. ...
