Effect of certain structural parameters of reinforced plastics on strength and stiffness in interlaminar shear

1976 ◽  
Vol 11 (2) ◽  
pp. 220-223 ◽  
Author(s):  
A. V. Sandalov ◽  
M. Z. Medvedev
Keyword(s):  
Structural Parameters ◽  
Reinforced Plastics ◽  
Interlaminar Shear ◽  
Strength And Stiffness

Possibilities of predicting the strength and stiffness of layered, orthogonally reinforced plastics in interlaminar shear

1976 ◽  
Vol 11 (3) ◽  
pp. 488-490 ◽  
Author(s):  
A. V. Sandalov ◽  
M. Z. Medvedev ◽  
V. F. Zinchenko ◽  
S. N. Belova
Keyword(s):  
Reinforced Plastics ◽  
Interlaminar Shear ◽  
Strength And Stiffness

Applications of Variable-Axial Fibre Designs in Lightweight Fibre Reinforced Polymers

2015 ◽  
Vol 825-826 ◽  
pp. 757-762 ◽  
Author(s):  
Emanuel Richter ◽  
Axel Spickenheuer ◽  
Lars Bittrich ◽  
Kai Uhlig ◽  
Gert Heinrich
Keyword(s):  
Carbon Fibre ◽  
Design Strategies ◽  
Special Design ◽  
Reinforced Polymers ◽  
Reinforced Plastics ◽  
Strength And Stiffness ◽  
Carbon Fibre Reinforced Plastics

A load dependent and curvilinear respectively variable-axial fibre design can notably enhance the strength and stiffness of lightweight components compared to fibre reinforced structures made of common multiaxial fibre textiles. At the Leibniz-Institut für Polymerforschung Dresden e. V. (IPF) special design strategies are in the focus of current studies. Two currently developed components made of carbon fibre reinforced plastics, a lightweight three-legged stool and a lightweight recurve bow riser, are described within this paper.

Intralaminar Reinforcement for Biomimetic Toughening of Bismaleimide Composites Using Nanostructured Materials

Materials ◽  
2005 ◽  
Author(s):  
Thomas Tiano ◽  
Margaret Roylance ◽  
Benjamin Harrison ◽  
Richard Czerw
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Laminated Composite ◽  
High Strength ◽  
Interlaminar Shear Strength ◽  
Aircraft Wings ◽  
Trailing Edges ◽  
Interlaminar Shear ◽  
Strength And Stiffness ◽  
Walled Carbon Nanotubes

Many conventional composite materials are composed of multiple layers of continuous fiber reinforced resin produced by lamination of b-staged prepreg and subsequent cure. These materials exhibit very high strength and stiffness in the plane, dominated by the properties of the fibers. The Achilles heel of such composites is the interlaminar strength, which is dependent on the strength of the unreinforced resin, often leading to failure by delamination under load. Current methods for increasing the interlaminar shear strength of composites consist of inserting translaminar reinforcement fibers through the entire thickness of a laminated composite, such as z-pin technology developed by Foster-Miller [1]. While effective, this technique adds several processing steps, including ultrasonic insertion of the z-pins into the laminate, subsequently causing a significant cost increase to laminated composites. Described in this paper is a process utilizing single-walled carbon nanotubes (SWNTs) and vapor grown carbon nanofibers as reinforcing elements promoting interlaminar shear strength and toughness in carbon fiber/bismaleimide (BMI) resin composites. The resulting composites mimic the natural reinforcing mechanism utilized in insect cuticles. Three different methods of increasing the affinity of these carbon nanofillers for the BMI matrix were explored. The mechanical properties of these composites were assessed using end notch flexure testing. The results indicated that including nanofiller at the laminae interface could increase the interlaminar shear strength of carbon fiber/BMI composites by up to 58%. SEM micrographs revealed that the nanofiller successfully bridged the laminae of the composite, thus biomimicking the insect cuticle. Composite fabrication techniques developed on this program would have a wide variety of applications in space and aerospace structures including leading and trailing edges of aircraft wings.

Prediction of bending strength and stiffness strength of particleboard based on structural parameters by Buckingham’s p-theorem

2010 ◽  
Vol 7 (1-2) ◽  
pp. 65-70 ◽  
Author(s):  
Mohammad Arabi ◽  
Mehdi Faezipour ◽  
Mohammad Layeghi ◽  
Akbar Enayati ◽  
Reza Zahed
Keyword(s):  
Bending Strength ◽  
Structural Parameters ◽  
Strength And Stiffness
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