scholarly journals Interlaminar Shear Properties of Z-Pinned Carbon Fiber Reinforced Aluminum Matrix Composites by Short-Beam Shear Test

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1874 ◽  
Author(s):  
Sian Wang ◽  
Yunhe Zhang ◽  
Gaohui Wu
Keyword(s):  
Shear Test ◽  
Aluminum Matrix ◽  
Interlaminar Shear Strength ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Shear Properties ◽  
Microstructural Damage ◽  
Short Beam ◽  
Beam Shear ◽  
Interlaminar Shear

This paper presents the effect of through-thickness reinforcement by steel z-pins on the interlaminar shear properties and strengthening mechanisms of carbon fiber reinforced aluminum matrix composites (Cf/Al) with a short beam shear test method. Microstructural analysis reveals that z-pins cause minor microstructural damage including to fiber waviness and aluminum-rich regions, and interface reaction causes a strong interface between the stainless steel pin and the aluminum matrix. Z-pinned Cf/Al composites show reduced apparent interlaminar shear strength due to a change in the failure mode compared to unpinned specimens. The changed failure mode could result from decreased flexural strength due to microstructural damage as well as increased actual interlaminar shear strength. Fracture work is improved significantly with a z-pin diameter. The strong interface allows the deformation resistance of the steel pin to contribute to the crack bridging forces, which greatly enhances the interlaminar shear properties.

Modified Short Beam Shear Test for Measuring Interlaminar Shear Strength of Composites

AIAA Journal ◽  
2002 ◽  
Vol 40 (11) ◽  
pp. 2368-2370
Author(s):  
Kunigal Shivakumar ◽  
Felix Abali ◽  
Adrian Pora
Keyword(s):  
Shear Strength ◽  
Shear Test ◽  
Interlaminar Shear Strength ◽  
Short Beam ◽  
Beam Shear ◽  
Interlaminar Shear

A comparative study on the interlaminar shear strength of carbon, glass, and Kevlar fabric/epoxy laminates filled with SiC particles

2017 ◽  
Vol 51 (20) ◽  
pp. 2835-2844 ◽  
Author(s):  
Mohamad Alsaadi ◽  
Adnan A Ugla ◽  
Ahmet Erklig
Keyword(s):  
Shear Strength ◽  
Shear Test ◽  
Interlaminar Shear Strength ◽  
Cnc Machine ◽  
Kevlar Fiber ◽  
Modification Process ◽  
Sic Particles ◽  
Short Beam ◽  
Beam Shear ◽  
Interlaminar Shear

The present article investigates the interlaminar shear strength of the woven carbon, glass, and Kevlar fiber reinforced epoxy (CFRE, GFRE, and KFRE) composites filled with SiC particles. The work covers the samples preparation, testing, and analyzing. The samples were fabricated using the regular addition of the SiC particles as 0, 5, 10, 15, and 20 wt% of the total weight of epoxy resin. Samples of the short beam shear test were cut using CNC machine. The experiments were conducted according to the ASTM-D-2344 standard. The fracture surfaces of the laminate samples were observed by scanning electron and optical microscopy. The major benefits of the current study are that the modification process by adding a certain amount of the SiC particles significantly enhanced the interlaminar shear strength of CFRE, GFRE, and KFRE composites as the comparison to the conventional ones.

Microstructure optimizations for improving interlaminar shear strength and self-healing efficiency of spread carbon fiber/epoxy laminates containing microcapsules

2020 ◽  
Vol 55 (1) ◽  
pp. 27-38
Author(s):  
Yasuka Nassho ◽  
Kazuaki Sanada
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Optical Microscope ◽  
Interlaminar Shear Strength ◽  
Self Healing ◽  
Short Beam ◽  
Healing Efficiency ◽  
Beam Shear ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy

The purpose of this study is to improve interlaminar shear strength and self-healing efficiency of spread carbon fiber (SCF)/epoxy (EP) laminates containing microcapsules. Microencapsulated healing agents were embedded within the laminates to impart a self-healing functionality. Self-healing was demonstrated on short beam shear specimens, and the healing efficiency was evaluated by strain energies of virgin and healed specimens. The effects of microcapsule concentration and diameter on apparent interlaminar shear strength and healing efficiency were discussed. Moreover, damaged areas after short beam shear tests were examined by an optical microscope to investigate the relation between the microstructure and the healing efficiency of the laminates. The results showed that the stiffness and the apparent interlaminar shear strength of the laminates increased as the microcapsule concentration and diameter decreased. However, the healing efficiency decreased with decreasing the microcapsule concentration and diameter.

scholarly journals Effects of Piezoceramic Particle Addition on the Fracture Toughness Behaviour of CF/EP – Composites

2005 ◽  
Vol 14 (4) ◽  
pp. 096369350501400
Author(s):  
Patrick Rosso ◽  
T. Tanimoto ◽  
Klaus Friedrich
Keyword(s):  
Fracture Toughness ◽  
Piezoelectric Ceramic ◽  
Tensile Tests ◽  
Interlaminar Shear Strength ◽  
Interlaminar Fracture Toughness ◽  
Short Beam ◽  
Beam Shear ◽  
Fracture Surface Analysis ◽  
Interlaminar Shear ◽  
Particle Addition

In this study, the influence of piezoelectric ceramic particles (PZT) on a continuous carbon fibre (CF) reinforced epoxy was investigated. Therefore, unidirectional laminates were produced via film stacking in an autoclave. Mode-I interlaminar fracture toughness tests were carried out as well as tensile tests and short beam shear test to evaluate E-modulus and interlaminar shear strength (ILSS), respectively. The amount of PZT was varied and additional fracture surface analysis by scanning electron microscopy (SEM) clarified how the PZT affects the GIC of the particular laminates. It was found, that the addition of the PZT-particles caused a significant decrease in fracture toughness, whereas stiffness and ILSS were effected only marginally.

Incorporation of Carbon Nanotubes on Strategically De-Sized Carbon Fibers for Enhanced Interlaminar Shear Strength of Epoxy Matrix Composites

2019 ◽  
Vol 41 (4) ◽  
pp. 655-655
Author(s):  
Muhammad Abdul Basit Muhammad Abdul Basit ◽  
Sybt e anwar Qais Sybt e anwar Qais ◽  
Muhammad Saffee Ullah Malik and Ghufran Ur Rehman Muhammad Saffee Ullah Malik and Ghufran Ur Rehman ◽  
Faizan Siddique Awan Faizan Siddique Awan ◽  
Laraib Alam Khan and Tayyab Subhani Laraib Alam Khan and Tayyab Subhani
Keyword(s):  
Carbon Nanotubes ◽  
Shear Strength ◽  
Carbon Fibers ◽  
Epoxy Matrix ◽  
Interlaminar Shear Strength ◽  
Matrix Composites ◽  
Multiwalled Carbon ◽  
Shear Properties ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
Interlaminar Shear

Carbon fiber reinforced polymeric matrix composites are enormously used in aerospace and automotive industries due to their enhanced specific properties. However, the area of interlaminar shear properties still needs investigation so as to produce composites with improved through-the-thickness properties. To improve interlaminar shear properties of these composites, acid-functionalized multiwalled carbon nanotubes were deposited on de-sized carbon fibers through electrophoretic deposition. De-sizing of carbon fabric was performed through three different methods: furnace heating, acidic treatment and chloroform usage. As the acid-treatment provided better results than other two techniques, the acid-de-sized carbon fibers were coated with nanotubes and subsequently incorporated in epoxy matrix to prepare a novel class of multiscale composites using vacuum assisted resin transfer molding technique. Nearly 30% rise in the interlaminar shear strength of the composites was obtained which was credited to the coating of nanotubes on the surface of carbon fibers. The increased adhesion between carbon fibers and epoxy matrix due to mechanical interlocking of nanotubes was found to be the possible reason of improved interlaminar shear properties.

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