scholarly journals Research on flexural performance of damaged RC beams strengthened by FPR plates

2021 ◽  
Vol 233 ◽  
pp. 03007
Author(s):  
Jiarui Liu ◽  
Xian Cui
Keyword(s):  
Bearing Capacity ◽  
Concrete Structure ◽  
Steel Plate ◽  
New Technology ◽  
Utilization Rate ◽  
Rc Beam ◽  
Fiber Reinforced ◽  
Reinforcement Effect ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Combining two technologies of pasting fiber reinforced composite board (FRP) and externally reinforced steel plate concrete structure, fiber-reinforced composite material and steel plate composite reinforced concrete structure technology can effectively improve the stress performance of concrete reinforced structure. To explore the effect of the new technology steel plate anchoring FRP slab concrete beams and the effect of different damage levels on the reinforcement effect, in this paper, the author made 3 FRP reinforced beams with damage rates of 20%, 40%, and 60%, 1 RC beam with FRP plate only and an ordinary RC beam to analyze the reinforcement effect of the new process steel plate anchored FRP plate and the bearing capacity and plastic performance of the reinforced beam with different damage rates. The results show that the new technology steel plate anchoring FRP plate reinforcement technology can effectively prevent the occurrence of early peeling failure, improve the ductility and bearing capacity of the reinforced beam, and significantly increase the utilization rate of the FRP plate; as the damage rate increases, the ultimate bearing capacity of the reinforced beam increases, but the ductility is significantly reduced.

Load-bearing capacity of human incisor restored with various fiber-reinforced composite posts

2011 ◽  
Vol 27 (6) ◽  
pp. e107-e115 ◽  
Author(s):  
Anna-Maria Le Bell-Rönnlöf ◽  
Lippo V.J. Lassila ◽  
Ilkka Kangasniemi ◽  
Pekka K. Vallittu
Keyword(s):  
Bearing Capacity ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Fiber-reinforced Composite Substructure: Load-bearing Capacity of an Onlay Restoration and Flexural Properties of the Material

2006 ◽  
Vol 7 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Lippo V.J. Lassila ◽  
Pekka K. Vallittu ◽  
Sufyan K. Garoushi ◽  
Arzu Tezvergil
Keyword(s):  
Bearing Capacity ◽  
Static Load ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Material Combination ◽  
Load Bearing ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Light Curing

Abstract Aim The aim of this study was to determine the static load-bearing capacity of composite resin onlay restorations made of particulate filler composite (PFC) with two different types of fiber-reinforced composite (FRC) substructures. In addition, flexural properties of the material combination and the effect of polymerization devices were tested. Methods and Materials Specimens were prepared to simulate an onlay restoration, which consisted of 2 to 3 mm of FRC layer as a substructure (short random and continuous bidirectional fiber orientation) and a 1 mm surface layer of PFC. Control specimens were prepared from plain PFC. In Group A the specimens were incrementally polymerized only with a hand-light curing unit for 40 s, while in Group B the specimens were post-cured in a light-curing oven for 15 min before they were statically loaded with a steel ball. Bar-shaped test specimens were prepared to measure the flexural properties of material combination using a three-point bending test (ISO 10477). Results Analysis of variance (ANOVA) revealed all specimens with a FRC substructure have higher values of static load-bearing capacity and flexural properties than those obtained with plain PFC (p<0.001). Conclusion The load-bearing capacity of all the specimens decreased after post-curing and water storage. Restorations made from a material combination of FRC and PFC showed better mechanical properties than those obtained with plain PFC. Citation Garoushi SK, Lassila LVJ, Tezvergil A, Vallittu PK. Fiber-reinforced Composite Substructure: Loadbearing Capacity of an Onlay Restoration and Flexural Properties of the Material. J Contemp Dent Pract 2006 September;(7)4:001-008.

Load bearing capacity of bone anchored fiber-reinforced composite device

2007 ◽  
Vol 18 (10) ◽  
pp. 2025-2031 ◽  
Author(s):  
Ahmed Mansour Ballo ◽  
Lippo V. Lassila ◽  
Pekka K. Vallittu ◽  
Timo O. Närhi
Keyword(s):  
Bearing Capacity ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

scholarly journals Short Fiber Reinforced Composite: a New Alternative for Direct Onlay Restorations

2013 ◽  
Vol 7 (1) ◽  
pp. 181-185 ◽  
Author(s):  
Sufyan Garoushi ◽  
Enas Mangoush ◽  
Mangoush Vallittu ◽  
Lippo Lassila
Keyword(s):  
Surface Layer ◽  
Bearing Capacity ◽  
Composite Resin ◽  
Short Fiber ◽  
Control Group ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Objectives: To determine the static load-bearing capacity of direct composite onlay restorations made of novel filling composite resin system which combines short fiber-reinforced composite resin (FC) and conventional particulate filler composite resin (PFC). Methods: Three groups of onlay restorations were fabricated (n = 8/group); Group A: made from conventional particulate filler composite resin (Z250, 3M-ESPE, USA, control), Group B: made from short fiber-reinforced composite resin (EverX posterior, StickTeck Ltd, member of GC group, Turku, Finland) as substructure with 1 mm surface layer of PFC, Group C: made from FC composite resin. The specimens were incrementally polymerized with a hand-light curing unit for 80 s before they were statically loaded with two different sizes (3 & 6 mm) of steel ball until fracture. Failure modes were visually examined. Data were analyzed using ANOVA (p = 0.05). Results: ANOVA revealed that onlay restorations made from FC composite resin had statistically significantly higher load-bearing capacity (1733 N) ( p < 0.05) than the control PFC composite resin (1081 N). Onlays made of FC composite resin with a surface layer of PFC gave force values of 1405 N which was statistically higher than control group ( p < 0.05). No statistically significant difference was found in the load-bearing capacity between groups loaded by different ball sizes Significance: Onlay restorations combining base of short fiber reinforced composite resin as substructure and surface layer of conventional composite resin displayed promising performance in high load bearing areas.

Mathematical Model of the Effective Properties of a Fiber Reinforced Composite with a Linearly Graded Transition Zone

2010 ◽  
Vol 38 (4) ◽  
pp. 286-307
Author(s):  
Carey F. Childers
Keyword(s):  
Mathematical Model ◽  
Transition Zone ◽  
Effective Properties ◽  
Local Stress ◽  
Stress And Strain ◽  
Fiber Reinforced ◽  
Strain Fields ◽  
Shear Moduli ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Abstract Tires are fabricated using single ply fiber reinforced composite materials, which consist of a set of aligned stiff fibers of steel material embedded in a softer matrix of rubber material. The main goal is to develop a mathematical model to determine the local stress and strain fields for this isotropic fiber and matrix separated by a linearly graded transition zone. This model will then yield expressions for the internal stress and strain fields surrounding a single fiber. The fields will be obtained when radial, axial, and shear loads are applied. The composite is then homogenized to determine its effective mechanical properties—elastic moduli, Poisson ratios, and shear moduli. The model allows for analysis of how composites interact in order to design composites which gain full advantage of their properties.

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