Basalt nanoparticle reinforced hybrid woven composites: Mechanical and thermo-mechanical performance

2017 ◽  
Vol 18 (12) ◽  
pp. 2433-2442 ◽  
Author(s):  
Rajesh Mishra ◽  
Hafsa Jamshaid ◽  
Jiri Militky
Keyword(s):  
Mechanical Performance ◽  
Woven Composites

EXPERIMENTALLY VALIDATED SIMULATIONS OF BLIND HOLE DRILLING IN 3D WOVEN CARBON/EPOXY COMPOSITE WITH PROCESSING-INDUCED RESIDUAL STRESSES

2021 ◽  
Author(s):  
ARTURO LEOS ◽  
KOSTIANTYN VASYLEVSKYI ◽  
IGOR TSUKROV ◽  
TODD GROSS ◽  
BORYS DRACH
Keyword(s):  
Residual Stresses ◽  
Epoxy Matrix ◽  
Mechanical Performance ◽  
Matrix Cracking ◽  
Woven Composites ◽  
Hole Drilling ◽  
Blind Hole ◽  
Matrix Cracks ◽  
Numerical Predictions ◽  
3D Woven Composites

Manufacturing-induced residual stresses in carbon/epoxy 3D woven composites arise during cooling after curing due to a large difference in the coefficients of thermal expansion between the carbon fibers and the epoxy matrix. The magnitudes of these stresses appear to be higher in composites with high throughthickness reinforcement and in some cases are sufficient to lead to matrix cracking. This paper presents a numerical approach to simulation of development of manufacturing-induced residual stresses in an orthogonal 3D woven composite unit cell using finite element analysis. The proposed mesoscale modeling combines viscoelastic stress relaxation of the epoxy matrix and realistic reinforcement geometry (based on microtomography and fabric mechanics simulations) and includes imaginginformed interfacial (tow/matrix) cracks. Sensitivity of the numerical predictions to reinforcement geometry and presence of defects is discussed. To validate the predictions, blind hole drilling is simulated, and the predicted resulting surface displacements are compared to the experimentally measured values. The validated model provides an insight into the volumetric distribution of residual stresses in 3D woven composites. The presented approach can be used for studies of residual stress effects on mechanical performance of composites and strategies directed at their mitigation.

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

2018 ◽  
Vol 38 (2) ◽  
pp. 49-61 ◽  
Author(s):  
M Tarfaoui ◽  
M Nachtane
Keyword(s):  
Mechanical Performance ◽  
Split Hopkinson Pressure Bar ◽  
Compressive Loading ◽  
Three Dimensional ◽  
Woven Composites ◽  
Two Dimensional ◽  
Hopkinson Pressure Bar ◽  
Out Of Plane ◽  
Split Hopkinson ◽  
Pressure Bar

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

Optimization of 3D woven preform for improved mechanical performance

2018 ◽  
Vol 48 (7) ◽  
pp. 1206-1227 ◽  
Author(s):  
Muhammad Kashif ◽  
Syed Talha Ali Hamdani ◽  
Yasir Nawab ◽  
Muhammad Ayub Asghar ◽  
Muhammad Umair ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Research Work ◽  
Natural Fibers ◽  
Physical And Mechanical Properties ◽  
Areal Density ◽  
Vital Role ◽  
Woven Composites ◽  
Woven Structures ◽  
Weave Pattern

For structural design applications, through-thickness characteristics of reinforcement played a vital role, which is why 3D woven preforms are recommended for such applications. These characteristics are mainly dependent on the fiber and yarn positioning in reinforcement. Although research has been conducted for characterizing woven composites, special attention has not been made on weave pattern parameter which directly affects the mechanical performance of composites. In this research work, 3D orthogonal layer to layer and through thickness woven structures with different interlocking patterns have been thoroughly studied for their mechanical properties, thickness, air permeability and areal density. Natural fibers when used with biodegradable matrix find use in structural, as well as low to medium impact applications for automobiles. Jute yarn was used to produce four-layered 3D woven structures, as synthetic fibers will not give a biodegradable composite part. The focus of this study is to optimize weave pattern, which is robust in design, degradable preforms and easy to reproduce. The main objective of this research focused on the effectiveness of weaving patterns on physical and mechanical properties as well as to optimize the weave pattern for optimum performance. Grey relational analysis was used for the optimization of the robust weave pattern. The results showed that hybrid structures can be useful for improving the properties of the orthogonal layer to layer and through thickness woven structures. It was also noted that weft-way 3D woven structures can provide comparable mechanical properties with warp-way 3D woven structures.

Study of influence of interlocking patterns on the mechanical performance of 3D multilayer woven composites

2018 ◽  
Vol 37 (7) ◽  
pp. 429-440 ◽  
Author(s):  
Muhammad Umair ◽  
Syed Talha Ali Hamdani ◽  
Muhammad Ayub Asghar ◽  
Tanveer Hussain ◽  
Mehmet Karahan ◽  
...  
Keyword(s):  
Impact Strength ◽  
Dynamic Mechanical Analysis ◽  
High Performance ◽  
Bending Strength ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Mechanical Analysis ◽  
Woven Composites ◽  
Dynamic Mechanical ◽  
Isotropic Structure

Three-dimensional multilayer woven composites are mostly used in high-performance applications due to their excellent out-of-plane mechanical performance. The current research presents an experimental investigation on the mechanical behavior of three-dimensional orthogonal layer-to-layer interlock composites. The glass filament yarn and carbon tows were used as reinforcement in warp and weft directions respectively, whereas epoxy was used as a resin for composite fabrication. Three different types of orthogonal layer to layer interlock namely warp, weft, and bi-directional interlock composites were fabricated and the effect of interlocking pattern on their mechanical performance was evaluated. The evaluation of the mechanical performance was made on the basis of tensile strength, impact strength, flexural strength, and dynamic mechanical analysis of composites in warp and weft directions. It was found that warp and weft interlock composites showed better tensile behavior as compared to bi-directional interlock composite both in the warp and weft directions, due to the presence of less crimp as compared to the bi-directional interlock composite. However, the bi-directional interlock composite exhibited considerably superior impact strength and three-point bending strength as compared to the other structures under investigation. These superior properties of bi-directional interlock composites were achieved by interlocking points in warp and weft directions simultaneously, creating a more compact and isotropic structure. Tan delta values of dynamic mechanical analysis results showed that bi-directional interlock composite displayed the highest capacity of energy dissipation in the warp and weft directions while weft interlock structures displayed highest storage and loss moduli in the warp direction.

Experimental Investigation of In-Plane Mechanical Performance of Carbon/Glass Hybrid Woven Composite

2014 ◽  
Vol 697 ◽  
pp. 132-135
Author(s):  
Jia Hai Lu ◽  
Ping Zhu ◽  
Qing Hui Ji ◽  
Zhang Cheng
Keyword(s):  
Experimental Investigation ◽  
Mechanical Behavior ◽  
Static Loading ◽  
Mechanical Performance ◽  
Woven Composites ◽  
Woven Composite ◽  
Compressive Behavior ◽  
Engineering Applications ◽  
Vacuum Infusion ◽  
Effective Use

Woven composites have been increasingly employed in engineering applications. For effective use of woven composites in engineering applications, it is essential to fully understand the mechanical behavior. In the present study, both tensile and compressive behavior of a carbon/glass hybrid woven composite manufactured by vacuum infusion process was experimentally investigated under in-plane quasi-static loading. The experiments were performed at both the axial and off-axial directions. The results indicated that the in-plane mechanical performance of the studied composite was highly directional dependent and tension/compression asymmetric.

Effect of interlocking pattern on short beam strength of 3D woven composites

2019 ◽  
Vol 53 (20) ◽  
pp. 2789-2799 ◽  
Author(s):  
Muhammad Kashif ◽  
Syed TA Hamdani ◽  
Muhammad Zubair ◽  
Yasir Nawab
Keyword(s):  
Mechanical Performance ◽  
Natural Fiber ◽  
Woven Composites ◽  
Light Weight ◽  
Value For Money ◽  
Epoxy System ◽  
Short Beam ◽  
3D Woven Composites ◽  
Shear Beam ◽  
Weave Pattern

Natural fiber-based preforms possess various attractive characteristics in different applications due to their light weight, value for money and compatibility with the environment. The possible tailorable shapes and mechanical properties make these more attractive for composites applications. Earlier, researchers focused on characterizing preforms for composites, but this work emphasis on the outcome of the weave patterns on composites performance. Mechanical performance (especially shear beam strength) of the 3D layer-to-layer and through-the-thickness prefroms with different interlocking patterns was deliberated. Composites were fabricated using 3D woven jute preforms and green epoxy system. The diverse performance of composites was compared. The effect of weave pattern remained prominent in their composites.

scholarly journals Bearing Strength and Failure Mechanisms of Riveted Woven Carbon Composite Joints

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 105
Author(s):  
Mauricio Torres-Arellano ◽  
Manuel de Jesus Bolom-Martínez ◽  
Edgar Adrian Franco-Urquiza ◽  
Ruben Pérez-Mora ◽  
Omar A. Jiménez-Arévalo ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Carbon Composite ◽  
Woven Composites ◽  
Carbon Composites ◽  
Joint Shear Strength ◽  
Bearing Strength ◽  
Strength Curve ◽  
Study Case ◽  
Tomography Scan

This research aimed to determine riveted carbon/epoxy composites’ mechanical performance when fabricated by resin transfer molding (RTM). As this manufacturing process is gaining importance in the aeronautics and automotive industries, assembly methods and their reliability must be studied in terms of their airworthiness and transportation implementation. The study case resumes the determination of the bearing strength of RTM-woven carbon composites for different rivet joint diameters (1/8, 5/32 and 3/16 in). The joint shear strength was obtained following the ASTM D5961 instructions, and post-failure analysis was carried out by a computerized tomography scan. A residual strength curve is provided with the results to infer the bearing strength for the riveted composites as a function of the rivet width-to-diameter ratio. A discussion of the fracture mechanism and tensile strength is carried out to assess the understanding of the riveted woven composites.

scholarly journals Fabrication and Mechanical Performance of Non-Crimp Unidirectional Jute-Yarn Preform-Based Composites

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6664
Author(s):  
Yeasin Ali ◽  
Atik Faisal ◽  
Abu Saifullah ◽  
Hom N. Dhakal ◽  
Shah Alimuzzaman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Woven Composites ◽  
Weft Yarn ◽  
Warp Yarn ◽  
Load Bearing ◽  
Load Carrying ◽  
Jute Yarn

This work developed novel jute-yarn, non-crimp, unidirectional (UD) preforms and their composites, with three different types of warp jute yarns of varying linear densities and twists in the dry UD preforms, in order to present a possible solution to the detrimental effects of higher yarn twists and crimp at the warp–weft yarn interlacements of traditional, woven, preform-based composites on their mechanical properties. In the developed UD preforms, warp jute yarns were placed in parallel by using a wooden picture-frame pin board, with the minimal number of glass weft yarns to avoid crimp at the warp–weft yarns interlacements, which can significantly enhance the load-bearing ability of UD composites compared to traditional, woven, preform composites. It was found that an optimal combination of jute warp yarn linear densities and twists in the UD preforms is important to achieve the best possible mechanical properties of newly developed UD composites, because it encourages a proper polymer-matrix impregnation on jute fibres, leading to excellent fibre–matrix interface bonding. Composites made from the 25 lb/spindle jute warp yarn linear density (UD25) exhibited higher tensile and flexural properties than other UD composites (UD20, UD30). All the UD composites showed a much better performance compared to the traditional woven preform composites (W20), which were obviously related to the higher crimp and yarn interlacements, less load-carrying capacity, and poor fiber–matrix interfaces of W20 composites. UD25 composites exhibited a significant enhancement in tensile modulus by ~232% and strength by ~146%; flexural modulus by 138.5% and strength by 145% compared to W20 composites. This reveals that newly developed, non-crimp, UD preform composites can effectively replace the traditional woven composites in lightweight, load-bearing, complex-shaped composite applications, and hence, this warrants further investigations of the developed composites, especially on long-term and dynamic-loading mechanical characterizations.

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