Progressive Damage Modeling of Composite Materials Under Both Tensile and Compressive Loading Regimes

2008 ◽  
pp. 179-195 ◽  
Author(s):  
N. Zobeiry ◽  
A. Forghani ◽  
C. McGregor ◽  
R. Vaziri ◽  
A. Poursartip
Keyword(s):  
Composite Materials ◽  
Compressive Loading ◽  
Progressive Damage ◽  
Damage Modeling

scholarly journals Effectiveness of Hybrid and Partially Confined Concrete Subjected to Axial Compressive Loading Using CFRP and GFRP Composite Materials

2020 ◽  
Vol 28 (4) ◽  
pp. 8-14
Author(s):  
Youcef Ghernouti ◽  
Bahia Rabehi
Keyword(s):  
Composite Materials ◽  
Axial Load ◽  
Compressive Loading ◽  
Central Zone ◽  
Confined Concrete ◽  
Compression Behavior ◽  
Gfrp Composite ◽  
Strength And Deformation ◽  
Partial Confinement ◽  
Hybrid Reinforcement

AbstractThis paper presents the results of an experimental study that investigates the compression behavior of concrete and evaluates the effect of hybrid reinforcement by multiple geometries, and total and partial confinement, using CFRP and GFRP composite materials.A total of nine (09) variants of concrete cylindrical specimens, including one (01) variant of unconfined concrete and eight (08) variants of confined concrete with different geometries were subjected to axial load compression.The objectives of this study were to verify the applicability and effectiveness of partial and total confinement to improve the behavior of concrete, evaluate the effect of the hybrid confinement used, and obtain a typical reinforced model.The results obtained clearly show the effectiveness of the hybrid confinement and partially confined concrete in improving the compressive strength and deformation of the concrete, so it is possible to replace CFRP total confinement by partially confined concrete with two CFRP layers or by a hybrid confinement with a CFRP layer in the central zone and GFRP layers on the top and bottom of the specimen.

scholarly journals Crush and Acid Resistance of Microsphere Narrow Fractions from Fly Ash as the Basis of Composite Materials

2020 ◽  
pp. 189-200
Author(s):  
Galina V. Akimochkina ◽  
Elena S. Rogovenko ◽  
Elena V. Fomenko
Keyword(s):  
Weight Loss ◽  
Composite Materials ◽  
Fly Ash ◽  
Raw Materials ◽  
Compressive Loading ◽  
Acid Resistance ◽  
High Strength ◽  
Average Diameter ◽  
Narrow Fraction ◽  
Pulverized Combustion

The crush test and acid resistance of microsphere narrow fractions with average diameter dav of 5, 8 and 25 μm of the SiO2–Al2O3–FeO system and with dav of 4 and 10 μm the CaO–SiO2–Al2O3– FeO system separated from fly ash from pulverized combustion of Ekibastuz and Irsha-Borodinsky coals were studied. It has been established that all investigated ash fractions of both raw materials are characterized by high strength: microspheres of a larger narrow fraction with dav = 25 μ m a re not destroyed by compressive loading at pressures up to 51.7 MPa, dispersed narrow fractions of microspheres with dav ≤ 10 μm – up to 68.9 MPa. Microsphere narrow fractions with aluminosilicate composition have satisfactory acid resistance; the weight loss after treatment with 15 % hydrochloric acid at 65 °C for 30 minutes was 10–15 wt. %

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