Burst Pressure of Glass Fiber Tape Reinforced Polyethylene Pipes with Interlayer Delamination Defect

2021 ◽  
Author(s):  
Jianfeng Shi ◽  
Zhoutian Ge ◽  
Zhenlei Ni ◽  
Jinyang Zheng
Keyword(s):  
Bearing Capacity ◽  
Glass Fiber ◽  
Damage Model ◽  
Burst Pressure ◽  
Progressive Damage ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Polyethylene Pipes ◽  
Good Consistency ◽  
Progressive Damage Model

Abstract Glass fiber tape reinforced polyethylene (GFTRP) pipes are widely used for the transportation of oil and high pressure gas due to their good load bearing capacity and environmental adaptability. Delamination defect is one of the most common defects of GFTRP pipes during manufacturing and service. This paper investigates the load bearing capacity of GFTRP pipe with interlayer delamination defect in between glass fiber tapes, via a combined experimental and numerical method. In the burst experiments, GFTRP pipes with layup of [±55°]12 were prepared with the artificial delamination defects set in between the 6th and 7th plies. In the numerical model, we used progressive damage model and cohesive element method to analysis the failure of GFTRP pipe with interlayer delamination defect. The results show that both the widths and axial locations of interlayer delamination defects will affect the burst pressure of GFTRP pipe, and the numerical analysis results are in good consistency with experiments. Ultimately, the influence of defect width and location on the burst pressure of GFTRP pipe was discussed in detail.

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

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.

Damage Modeling of the Load-Bearing Capacity of Damaged Steam Generator Tubes in Nuclear Power Plants

2013 ◽  
Author(s):  
Xaver Schuler ◽  
Michael Seidenfuss ◽  
Sarah Gehrlicher ◽  
Jan Mahlke
Keyword(s):  
Fracture Mechanics ◽  
Bearing Capacity ◽  
Steam Generator ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Damage Model ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Steam Generator Tubes

In austenitic steam generator (SG) tubes installed in nuclear power plants (NPP), wall thinning and crack formation caused by stress corrosion cracking have been observed. These cracks are manly orientated in longitudinal direction of the tube but also in a few cases circumferential oriented cracks nave been found. Because of the small crack depths and wall thickness, the application of fracture mechanics assessments of the load-bearing capacity of these cracks is very limited. Equally it is almost impossible to determine the necessary fracture mechanics parameters for such component geometries. Damage mechanics models are able to describe the experimentally observed processes in smooth and cracked specimens. They have no restrictions like fracture mechanics models. In this paper, the damage model of Rousselier was used to describe the failure behavior and load-bearing capacity of cracked steam generator tubes. The operation temperature of these tubes is about 300 °C. The Rousselier parameters for the austenitic steel X 2 NiCrAlTi 32-20 (1.4558) of the tubes were determined by using tensile tests and burst tests at temperatures of 20 °C and 300 °C. With this damage model it is possible to evaluate the existing limit values for burst pressures and necessary safety factors for the plugging of steam generator tubes in nuclear power plants. These results can also contribute to the safety evaluation of stress corrosion cracking in steam generator tubes.

Increased load bearing capacity of mechanically joined FRP/metal joints using a pin structured auxiliary joining element

2020 ◽  
Vol 62 (1) ◽  
pp. 55-60
Author(s):  
Per Heyser ◽  
Vadim Sartisson ◽  
Gerson Meschut ◽  
Marcel Droß ◽  
Klaus Dröder
Keyword(s):  
Bearing Capacity ◽  
Load Bearing Capacity ◽  
Load Bearing

Load-Bearing Capacity of Direct Inlay-Retained Fibre-reinforced Composite Fixed Partial Dentures with Different Cross-Sectional Pontic Design

2017 ◽  
Vol 68 (1) ◽  
pp. 94-100
Author(s):  
Oana Tanculescu ◽  
Adrian Doloca ◽  
Raluca Maria Vieriu ◽  
Florentina Mocanu ◽  
Gabriela Ifteni ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Fracture Pattern ◽  
Load Bearing Capacity ◽  
Cross Sectional ◽  
Load Bearing ◽  
Reinforced Composite ◽  
Polyethylene Fibre

The load-bearing capacity and fracture pattern of direct inlay-retained FRC FDPs with two different cross-sectional designs of the ponticwere tested. The aim of the study was to evaluate a new fibre disposition. Two types of composites, Filtek Bulk Fill Posterior Restorative and Filtek Z250 (3M/ESPE, St. Paul, MN, USA), and one braided polyethylene fibre, Construct (Kerr, USA) were used. The results of the study suggested that the new tested disposition of the fibres prevented in some extend the delamination of the composite on buccal and facial sides of the pontic and increased the load-bearing capacity of the bridges.

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