scholarly journals Monotonic and cyclic short beam shear response of 3D woven composites

2010 ◽  
Vol 70 (15) ◽  
pp. 2190-2197 ◽  
Author(s):  
T.R. Walter ◽  
G. Subhash ◽  
B.V. Sankar ◽  
C.F. Yen
Keyword(s):  
Woven Composites ◽  
Shear Response ◽  
Short Beam ◽  
Beam Shear ◽  
3D Woven Composites

A Novel Method for Dynamic Short-Beam Shear Testing of 3D Woven Composites

2012 ◽  
Vol 53 (3) ◽  
pp. 493-503 ◽  
Author(s):  
T. R. Walter ◽  
G. Subhash ◽  
B. V. Sankar ◽  
M. C. Song ◽  
C. F. Yen
Keyword(s):  
Woven Composites ◽  
Shear Testing ◽  
Short Beam ◽  
Beam Shear ◽  
3D Woven Composites ◽  
Novel Method

Mechanical properties of 3D-woven composites with guide sleeves

2016 ◽  
Vol 54 (12) ◽  
pp. 1571-1578
Author(s):  
Xiaochuan Wu ◽  
Zhongde Shan ◽  
Feng Liu ◽  
Yuan Wang
Keyword(s):  
Shear Fracture ◽  
Woven Composites ◽  
Tensile Fracture ◽  
Woven Composite ◽  
Compression Properties ◽  
Short Beam ◽  
Beam Shear ◽  
3D Woven Composites ◽  
Interlaminar Shear ◽  
3D Composite

In this study, the preforms of 3D woven composite materials were made by a flexible oriented 3D composite woven process. The vacuum-assisted resin infusion (VARI) process was used to impregnate the preforms. The short-beam shear test, the compression test, and SEM were used to investigate the interlaminar shear performance and the compression behavior of the 3D woven composite with guide sleeves, and the effect of the guide sleeves on the above properties. It is indicated that the interlaminar shear behavior of 3D woven composites with guide sleeves showed the typical fracture characteristics of a pseudoplastic material. And the fracture modes of interlaminar shear mainly include interlaminar shear fracture and tensile fracture of fibers at the bottom. The interlaminar shear strength of materials increased with the diameter and interval of guide sleeves decreasing. Furthermore, the loss of in-plane compression properties of the materials brought by guide sleeves could be effectively avoided by reasonable control of the diameter and the volume fracture of guide sleeves.

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.

Effect of Electrospun Fibers on the Interlaminar Properties of Woven Composites

2008 ◽  
Vol 47-50 ◽  
pp. 1031-1034 ◽  
Author(s):  
Ajit D. Kelkar ◽  
Ram Mohan ◽  
Ronnie Bolick ◽  
Sachin Shendokar
Keyword(s):  
Composite Laminates ◽  
Hybrid Composites ◽  
Electrospun Fiber ◽  
Low Velocity Impact ◽  
Woven Composites ◽  
Shear Tests ◽  
Fiber Glass ◽  
Electrospinning Technique ◽  
Short Beam ◽  
Beam Shear

Failure by delamination of composite laminates due to low velocity impact damages is critical because of the subsurface nature of delamination. Traditional methods such as stitching and Zpinning, while improving interlaminar properties in woven composites, lead to a reduction of the inplane properties. To alleviate these problems, use of Tetra Ethyl Orthosilicate (TEOS) nano fibers manufactured using electrospinning technique in fiber Glass-Epon composite laminates is investigated for their potential to improve the interlaminar properties. Electrospun coated fiber glass woven mats are impregnated with epoxy resin using Heated-Vaccum Assisted Resin Transfer Moulding (H-VARTM) process. The interlaminar properties of the nano engineered hybrid composites obtained using ASTM Double Cantilever Beam (DCB) tests and short beam shear tests are compared with those without the presence of electrospun fiber layers, to study their influence. The short beam shear tests revealed a 20% improvement due to presence of TEOS interlaminar electrospun nanofibers. It is also noteworthy that fibers cured at different temperature levels had variation in performance as observed in MSBS test results.

scholarly journals Simultaneous effects of rice husk silica and silicon carbide whiskers on the mechanical properties and morphology of sodium geopolymer

2020 ◽  
Vol 54 (29) ◽  
pp. 4611-4620 ◽  
Author(s):  
Akm Samsur Rahman ◽  
Chirag Shah ◽  
Nikhil Gupta
Keyword(s):  
Silicon Carbide ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Nanoparticles ◽  
Rice Husk ◽  
Silicon Carbide Whiskers ◽  
Short Beam ◽  
Spherical Silica ◽  
Beam Shear ◽  
Strength Improvement

The current research is focused on developing a geopolymer binder using rice husk ash–derived silica nanoparticles. Four types of rice husks were collected directly from various rice fields of Bangladesh in order to evaluate the pozzolanic activity and compatibility of the derived rice husk ashes with precursors of sodium-based geopolymers. Silicon carbide whiskers were introduced into sodium-based geopolymers in order to evaluate the response of silicon carbide whiskers to the interfacial bonding and strength of sodium-based geopolymers along with rice husk ashes. Compression, flexural and short beam shear tests were performed to investigate the synergistic effect of rice husk ashes–derived silica and commercially available silicon carbide whiskers. Results show that rice husk ashes–derived spherical silica nanoparticles reduced nano-porosity of the geopolymers by ∼20% and doubled the compressive strength. The simultaneous additions of rice husk ashes and silicon carbide whiskers resulted in flexural strength improvement by ∼27% and ∼97%, respectively. The increase in compressive strength due to the inclusion of silica nanoparticles is related to the reduction in porosity. The increase in flexural strength due to simultaneous inclusion of silica and silicon carbide whiskers suggest that silica particles are compatible with the metakaolin-based geopolymers, which is effective in consolidation. Finally, microscopy suggest that silicon carbide whiskers are effective in increasing bridged network and crack resistance.

scholarly journals Open hole quasi-static and fatigue characterisation of 3D woven composites

2015 ◽  
Vol 131 ◽  
pp. 765-774 ◽  
Author(s):  
S. Dai ◽  
P.R. Cunningham ◽  
S. Marshall ◽  
C. Silva
Keyword(s):  
Woven Composites ◽  
Open Hole ◽  
3D Woven Composites
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