Matrix Cracking of High-Performance Composite Laminates with Variation of Laminate Stacking Sequence and Testing Temperature

1997 ◽  
Vol 19 (3) ◽  
pp. 142 ◽  
Author(s):  
WS Johnson ◽  
JE Masters ◽  
DW Wilson ◽  
X Huang ◽  
JW Gillespie ◽  
...  
Keyword(s):  
Composite Laminates ◽  
High Performance ◽  
Testing Temperature ◽  
Matrix Cracking ◽  
Stacking Sequence ◽  
High Performance Composite

scholarly journals Mode-I Fracture Behavior of CFRPs: Numerical Model of the Experimental Results

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 513 ◽  
Author(s):  
Claudia Barile ◽  
Caterina Casavola ◽  
Benedetto Gambino ◽  
Alessandro Mellone ◽  
Marco Spagnolo
Keyword(s):  
Numerical Model ◽  
Composite Laminates ◽  
High Performance ◽  
Mechanical Response ◽  
Numerical Models ◽  
Constitutive Relationship ◽  
Mode I ◽  
Experimental Calibration ◽  
Reinforced Plastics ◽  
High Performance Composite

In the last decades, the increasing use of laminate materials, such as carbon fibre reinforced plastics, in several engineering applications has pushed researchers to deeply investigate their mechanical behavior, especially in consideration of the delamination process, which could affect their performance. The need for improving the capability of the current instruments in predicting some collapse or strength reduction due to hidden damages leads to the necessity to combine numerical models with experimental campaigns. The validation of the numerical models could give useful information about the mechanical response of the materials, providing predictive data about their lifetime. The purpose of the delamination tests is to collect reliable results by monitoring the delamination growth of the simulated in situ cracking and use them to validate the numerical models. In this work, an experimental campaign was carried out on high performance composite laminates with respect to the delamination mode I; subsequently, a numerical model representative of the experimental setup was built. The ANSYS Workbench Suite was used to simulate the delamination phenomena and modeFRONTIER was applied for the numerical/experimental calibration of the constitutive relationship on the basis of the delamination process, whose mechanism was implemented by means of the cohesive zone material (CZM) model.

scholarly journals High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

2021 ◽  
Vol 43 (9) ◽  
Author(s):  
Clifton Stephen ◽  
B. Shivamurthy ◽  
Abdel-Hamid I. Mourad ◽  
Rajiv Selvam
Keyword(s):  
Energy Absorption ◽  
High Velocity ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Matrix Cracking ◽  
Impact Behavior ◽  
Stacking Sequence ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Hybrid Fabric

AbstractIn this study, non-hybrid and hybrid (Kevlar, carbon and glass) fabric epoxy composite laminates were fabricated with different stacking sequences by hand lay-up followed by hot-compression molding. Experimental tests were conducted to investigate tensile, flexural, and hardness characteristics. It was found that the stacking sequence did not significantly affect the tensile strength and hardness values of the composites; however, it affected their flexural strength. Damage morphology of the specimens through SEM images showed that the major damage mechanisms in the composites were delamination, fiber breakage, pull-out, and matrix cracking. Based on the static experimental results, the high-velocity impact behavior was investigated through simulation study using LS-DYNA finite element analysis (FEA) software. To study the ballistic impact, a steel projectile with a hemispherical penetrating edge at impact velocities of 100 m.s−1, 250 m.s−1, and 350 m.s−1 was considered. Among non-hybrid fabric epoxy composite specimens, Kevlar/epoxy specimen was found to have the highest impact energy absorption followed by carbon/epoxy and glass/epoxy, respectively. Regarding the hybrid fabric epoxy composite specimens, the ones with Kevlar plies in the rear face exhibited better energy absorption compared to other stacking sequences. The non-hybrid glass/epoxy specimen had the lowest energy absorption and highest post-impact residual velocity of projectile among all specimens. From the FEA results, it was noted that impact resistance of hybrid composites improved when Kevlar fabric was placed in the rear layer. Thus, the stacking sequence was observed to be of substantial importance in the development of fabric-reinforced composite laminates for high-velocity impact applications.

Failure Modes in Hybrid Titanium Composite Laminates

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Johannes Reiner ◽  
Martin Veidt ◽  
Matthew Dargusch
Keyword(s):  
Composite Laminates ◽  
High Performance ◽  
Adhesive Bonding ◽  
Failure Modes ◽  
Impact Resistance ◽  
Surface Preparation ◽  
Matrix Cracking ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer

Hybrid titanium composite laminates (HTCLs) combine the benefits of thin titanium sheets and fiber-reinforced polymer (FRP) composite laminates to design high performance light-weight materials with optimized impact resistance, fracture toughness, durability, and/or thermal performance. This paper starts with a detailed review of typical failure modes observed in HTCLs. The critical manufacturing process of thin grade II titanium sheets combined with HexPly G947/M18 carbon fiber-reinforced polymer laminates is described in detail. This includes the evaluation of titanium surface preparation techniques, which guarantee good adhesive bonding. A systematic experimental study of different HTCL configurations under tensile loading confirms that the major failure modes are debonding between the titanium sheet and the FRP laminate, matrix cracking in the 90 deg plies of the FRP laminate and interlaminar delamination. The results show that HTCLs made from woven carbon FRP plies show higher ultimate strengths and strain at breaks than HTCLs containing a cross-ply composite core made from unidirectional (UD) prepreg.

scholarly journals Electrospun Piezoelectric Polymer Nanofiber Layers for Enabling in Situ Measurement in High-Performance Composite Laminates

ACS Omega ◽  
2018 ◽  
Vol 3 (8) ◽  
pp. 8891-8902 ◽  
Author(s):  
Saeid Lotfian ◽  
Claire Giraudmaillet ◽  
Ata Yoosefinejad ◽  
Vijay Kumar Thakur ◽  
Hamed Yazdani Nezhad
Keyword(s):  
Composite Laminates ◽  
High Performance ◽  
In Situ Measurement ◽  
Piezoelectric Polymer ◽  
Polymer Nanofiber ◽  
High Performance Composite

Core Programs of High-Performance Composite Materials

1998 ◽  
Author(s):  
A. Crasto ◽  
D. Anderson ◽  
R. Esterline ◽  
K. Han ◽  
C. Hill
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
High Performance Composite

scholarly journals Study of the Physical Behavior of a New Composite Material Based on Fly Ash from the Combustion of Coal in an Ultra-Supercritical Thermal Power Plant

2021 ◽  
Vol 5 (6) ◽  
pp. 151
Author(s):  
Mustapha El Kanzaoui ◽  
Chouaib Ennawaoui ◽  
Saleh Eladaoui ◽  
Abdelowahed Hajjaji ◽  
Abdellah Guenbour ◽  
...  
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Power Plant ◽  
High Performance ◽  
Thermal Power ◽  
Recovery Process ◽  
Industrial Wastes ◽  
Raw Material ◽  
Polymerization Reaction ◽  
High Performance Composite

Given the amount of industrial waste produced and collected in the world today, a recycling and recovery process is needed. The study carried out on this subject focuses on the valorization of one of these industrial wastes, namely the fly ash produced by an ultra-supercritical coal power plant. This paper describes the use and recovery of fly ash as a high percentage reinforcement for the development of a new high-performance composite material for use in various fields. The raw material, fly ash, comes from the staged combustion of coal, which occurs in the furnace of an ultra-supercritical boiler of a coal-fired power plant. Mechanical compression, thermal conductivity, and erosion tests are used to study the mechanical, thermal, and erosion behavior of this new composite material. The mineralogical and textural analyses of samples were characterized using Scanning Electron Microscopy (SEM). SEM confirmed the formation of a new composite by a polymerization reaction. The results obtained are very remarkable, with a high Young’s modulus and a criterion of insulation, which approves the presence of a potential to be exploited in the different fields of materials. In conclusion, the composite material presented in this study has great potential for building material and could represent interesting candidates for the smart city.

High-performance composite H-ZSM-5/alumina catalyst for the methanol-to-ethylene conversion

2021 ◽  
pp. 1-15
Author(s):  
Alexey A. Zhokh ◽  
Andrey I. Trypolskyi ◽  
Valentina I. Gritsenko ◽  
Tamila G. Serebrii ◽  
Peter E. Strizhak
Keyword(s):  
High Performance ◽  
Alumina Catalyst ◽  
Ethylene Conversion ◽  
High Performance Composite

Air-stable dopamine-treated garnet ceramic particles for high-performance composite electrolytes

2021 ◽  
Vol 486 ◽  
pp. 229363
Author(s):  
Mengyang Jia ◽  
Zhijie Bi ◽  
Chuan Shi ◽  
Ning Zhao ◽  
Xiangxin Guo
Keyword(s):  
High Performance ◽  
Composite Electrolytes ◽  
Ceramic Particles ◽  
High Performance Composite
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