scholarly journals Load-Bearing Capacity and Fracture Behavior of Glass Fiber-Reinforced Composite Cranioplasty Implants

2017 ◽  
Vol 15 (4) ◽  
pp. e356-e361 ◽  
Author(s):  
Jaakko M. Piitulainen ◽  
Riina Mattila ◽  
Niko Moritz ◽  
Pekka K. Vallittu
Keyword(s):  
Plastic Deformation ◽  
Bearing Capacity ◽  
Glass Fiber ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Glass Fiber Reinforced ◽  
Elastic And Plastic Deformation

Background Glass fiber-reinforced composites (FRCs) have been adapted for routine clinical use in various dental restorations and are presently also used in cranial implants. The aim of this study was to measure the load-bearing capacity and failure type of glass FRC implants during static loading with and without interconnective bars and with different fixation modes. Methods Load-bearing capacities of 2 types of FRC implants with 4 different fixation modes were experimentally tested. The sandwich-like FRC implants were made of 2 sheets of woven FRC fabric, which consisted of silanized, woven E-glass fiber fabrics impregnated in BisGMA-TEGDMA monomer resin matrix. The space between the outer and inner surfaces was filled with glass particles. All FRC implants were tested up to a 10-mm deflection with load-bearing capacity determined at 6-mm deflection. The experimental groups were compared using non-parametric Kruskal-Wallis analysis with Steel-Dwass post hoc test. Results FRC implants underwent elastic and plastic deformation until 6-mm deflection. The loading test did not demonstrate any protrusions of glass fibers or cut fiber even at 10-mm deflection. An elastic and plastic deformation of the implant occurred until the FRC sheets were separated from each other. In the cases of the freestanding setup (no fixation) and the fixation with 6 screws, the FRC implants with 2 interconnective bars showed a significantly higher load-bearing capacity compared with the implant without interconnective bars. Conclusions FRC implants used in this study showed a load-bearing capacity which may provide protection for the brain after cranial bone defect reconstruction.

Load bearing capacity of rice husk added glass fiber reinforced hollow block wall

2020 ◽  
Author(s):  
Srija Juluru ◽  
R. Divahar ◽  
G. Harishwar Goud ◽  
N. Mohan Chand ◽  
L. Rahul Reddy
Keyword(s):  
Bearing Capacity ◽  
Glass Fiber ◽  
Rice Husk ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Glass Fiber Reinforced ◽  
Hollow Block ◽  
Block Wall

Experimental study on axial compression buckling of glass fiber reinforced plastics solid pole with circular cross-section

2022 ◽  
pp. 136943322110542
Author(s):  
Jianhui Si ◽  
Shixiong Qiu ◽  
Shuyang Feng ◽  
Jiebin Chen ◽  
Zhenshan Wang
Keyword(s):  
Bearing Capacity ◽  
Glass Fiber ◽  
Axial Compression ◽  
Slenderness Ratio ◽  
Circular Cross Section ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics

Glass fiber reinforced plastics are widely used in civil engineering because of their advantages such as light weight, high strength, good pollution resistance, and corrosion resistance. This study investigated the buckling bearing capacity, failure characteristics, and slenderness ratios of GFRP solid bars with circular cross-sections subjected to axial compression. A total of 18 specimens were categorized into six groups. The slenderness ratios ranged from 57 to 123. It was found from experiments that the instability mode of the specimens was extreme point instability, and a bearing capacity platform phenomenon was observed when overall lateral instability occurred. The failure mode was axial and transverse tearing failure of the material in the middle of the specimen. During buckling, the tensile side was transformed from the compression of the resin matrix to tension in the fibers. The elastic modulus of glass fiber was much lower than that of the resin matrix. After tension occurred, increased deformation led to a rapid increase in lateral bending, which resulted in the phenomenon of the bearing platform. At ultimate deformation, brittle failure of the specimen occurred. The buckling load of the specimen decreased sharply with an increase in the slenderness ratio, and stress ratios decreased from 34.95% to 6.73%. It is suggested that the slenderness ratio not exceed 80. Finally, based on experimental results, a practical method for calculating the stable bearing capacity of solid GFRP poles is proposed.

Deformation Characteristics and Load-Bearing Capacity of NO.21 Coal Seam’s Mudstone Floor in Western Henan

2013 ◽  
Vol 644 ◽  
pp. 175-178
Author(s):  
Jing Ping Wei ◽  
Fan Chen ◽  
Zhi Hao Ding
Keyword(s):  
Plastic Deformation ◽  
Bearing Capacity ◽  
Peak Load ◽  
Layer By Layer ◽  
Specific Pressure ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Transition Mechanism ◽  
Failure State ◽  
Weak Plane

Through the floor specific pressure test, the floor specific pressure was obtained. The rock mass of mudstone, under the loading perpendicular to the weak plane, was in brittle-plastic failure state, and the bearing capacity of mudstone was equal to the Ⅲa grade floor. The brittle-plastic transition mechanism of the mudstone was revealed: Firstly, the more size, the more heterogeneity. The mudstone body was bigger than its rock samples, so there were more planes of weakness, which caused the macroscopic plastic deformation. Secondly, the directions of the load and the weak plane influenced the strength of the mudstone floor. During the plastic deformation, the compressive failure occurred layer by layer under the loading perpendicular to the weak planes, and the post peak load-bearing capacity of mudstone floor was decided by the layer’s strength.

Stress of Carbon Fiber Reinforced Polymer Tendons in Prestressed Simply Supported Beams

2013 ◽  
Vol 689 ◽  
pp. 353-357
Author(s):  
Chong Xi Bai ◽  
Xin Yan Shao ◽  
Qiu Ping Wang
Keyword(s):  
Carbon Fiber ◽  
Bearing Capacity ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Simply Supported ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The law of stress increment of unbonded carbon fiber reinforced polymer (CFRP) tendons at service stage and flexural load bearing capacity limit state is unclear, so it is difficult to accurately calculate crack width, deflection and load bearing capacity. In order to calculate the stress of CFRP tendons, deformation compatibility condition and moment-curvature analysis method are used to compile nonlinear full-range analysis programs of simply supported concrete beam partially prestressed with unbonded CFRP tendons. The computing results of stress in CFRP tendons are in good agreement with the tested results as a whole, so it indicates that the simulation analysis programs are reliable.

Quasi-Static Flexural and Tensile Behavior of Glass Fiber Reinforced Polymer

2013 ◽  
Vol 845 ◽  
pp. 302-305
Author(s):  
Syed Azwan ◽  
Behzad Abdi ◽  
Yahya Mohd Yazid ◽  
Ayob Amran
Keyword(s):  
Strain Rate ◽  
Glass Fiber ◽  
Testing Machine ◽  
Tensile Loading ◽  
Tensile Behavior ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Three Point Bending ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforce

In this paper, glass fiber reinforce polymer subject to quasi-static three point bending loading and tensile loading was studied experimentally. Glass fiber reinforced made of chopped strand mat (CSM) were used in this study. Several samples were prepared and tested by using Instron universal testing machine at different strain rate including 1mm/min, 10mm/min and 100mm/min and all of the tests were repeated three times in order to minimize experimental error and the average of the obtained results were used for further analysis. The load-extension curves and stress-strain curve of glass fiber reinforce subject to three point bending and tensile loading test were determined at different strain rate and the obtained results were compared together. As results of this study, it has found that the strain rate has effect on flexural and tensile behavior of glass fiber reinforce.

Load-bearing capacity of fiber reinforced fixed composite bridges

2012 ◽  
Vol 71 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Emine Göncü BaŞaran ◽  
Emrah Ayna ◽  
Sadullah ÜçtaŞli ◽  
Pekka K Vallittu ◽  
Lippo V. J Lassila
Keyword(s):  
Bearing Capacity ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Composite Bridges
Sign in / Sign up

Export Citation Format

Share Document