scholarly journals Biaxial Tensile Strength Characterization of Textile Composite Materials

10.5772/48105 ◽  
2012 ◽  
Author(s):  
David Alejandro Arellano Escrpita ◽  
Diego Crdenas ◽  
Hugo Elizalde ◽  
Ricardo Ramirez ◽  
Oliver Probst
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Textile Composite ◽  
Biaxial Tensile ◽  
Strength Characterization

Experimental and Analytical Strength Characterization of an Ultrasonic Welded Lap Shear Joint

2001 ◽  
Author(s):  
Samuel Ibekwe ◽  
Patrick F. Mensah ◽  
Ghanashyam Joshi ◽  
Guoqiang Li ◽  
Michael Stubblefield
Keyword(s):  
Experimental Study ◽  
Composite Materials ◽  
Statistical Difference ◽  
Ultrasonic Welding ◽  
Lap Shear ◽  
Shear Joint ◽  
Strength Characterization

Abstract An experimental study on ultrasonic welding of thermoplastic, which is a prelude to study how the technology can be adapted to join composite materials, was conducted. Three sets of specimen were studied to investigate the influence of energy guide on the bonded specimen. No major statistical difference between the ‘energy guides’ of the tested thermoplastic Celuka™ coupons were noted. Failure of the welded specimen was by shear at the interface. A 75% drop in strength for the bonded material was observed.

scholarly journals Characterization of Failure Strain In Fiber Reinforced Composites: Under On-Axis and Off-Axis Loading

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 216
Author(s):  
Muhammad Yasir Khalid ◽  
Ans Al Rashid ◽  
Zia Ullah Arif ◽  
Naveed Akram ◽  
Hassan Arshad ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Failure Strain ◽  
Epoxy Composite ◽  
Fiber Reinforced Composites ◽  
High Ductility ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Reinforced Composite

Metals are known for high ductility and have, been used to design and fabricate structural components for many years. However, composite materials are taking over traditional materials owing to their significant mechanical properties. Fiber-reinforced composites exhibit lower ductility and failure strain, resulting in brittle failure, limiting their application where high ductility is desired. In this study, an effort has been made to design, fabricate, and test continuous fiber-reinforced composites with improved ductility. A comparative analysis was performed for optimizing the failure strain of different woven fiber-reinforced composite materials under both on-axis (0°/90°) and off-axis (±45°) loading. The materials include carbon/epoxy, E-glass/epoxy, and jute/epoxy composite. The tests were performed according to ASTM D3039 standard. The strength of all tested composites in on-axis and off-axis loading was obtained from tensile test results. But failure strain was limited in on-axis loading. Interestingly, glass/epoxy composite showed improved failure strain, by 90%, without much loss in tensile strength in off-axis loading than on-axis loading. The jute fiber revealed limited tensile strength and failure strain in both loading conditions.

scholarly journals Characterization of PAN based Carbon Tow for Structural Composites

2019 ◽  
Vol 8 (6) ◽  
pp. 2067-2071
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Tensile Test ◽  
Tensile Properties ◽  
Tensile Failure ◽  
Resin System ◽  
Structural Composites ◽  
Liquid Resin ◽  
Epoxy Resin System

Fibers are load carrying component in a fiber reinforced polymer composite materials. Tensile properties of composite are affected by the properties of the fiber. Polyacrylonitrile (PAN) based carbon fibers are widely used as a reinforcement in composite materials because of its high tensile strength and tensile modulus. Stringent characterisation of PAN based carbon tow is paramount for the fabrication of high performance advanced composite products. This paper presents characterization of PAN based carbon tow for structural composites. The physical and chemical parameters of carbon tow namely tex, density, diameter of single fiber, sizing content and carbon content were characterized for carbon fiber. Tensile properties of PAN based carbon tow can be determined by mono filament test and liquid resin impregnated tow tensile test. In the present study, tensile strength and modulus of PAN based fiber was evaluated by mono filament test. It was observed that tensile failure load was varying from filament to filament for same lot of fiber in mono filament test. High scattering in tensile strength values of filaments was observed due to statically distributed surface flaws on the filaments. Coefficient of variance for tensile strength of filament by mono filament tensile test was varied from 12-25 % from one lot to other lot of carbon tow. Liquid resin impregnated tow tensile test was conducted with specified resin system with low temperature cure cycle, to get more consistent and more accurate values of fiber tensile strength, modulus and % strain. Carbon tow was characterized by laminate level mechanical properties namely NOL ring hoop tensile strength and ILSS with high temperature curing epoxy resin system, which is used for fabrication of actual structural composite product.

Strength Characterization of Adhesive Joint Surface-Modified by Large-Area EB Irradiation

2020 ◽  
Author(s):  
Yuya Omiya ◽  
Kenji Toyota ◽  
Ryota Nakanishi ◽  
Akira Okada ◽  
Togo Shinonaga ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Adhesive Joint ◽  
Roughness Parameter ◽  
Adhesive Joints ◽  
Joint Surface ◽  
Large Area ◽  
Mechanical Bond ◽  
Strength Characterization ◽  
Surface Modified

Abstract With recent improvement in adhesive performance, adhesive joints are used more in various industrial fields. Despite their advantage in connecting dissimilar adherends, adhesive joints are considered not suitable for key components of mechanical structures due to their large scatter in joint strengths. There are many factors that affect the strength of adhesive joint. However, the general bonding factors are (1) mechanical bond, (2) physical bonding, (3) chemical bonding. The adhesion mechanism is complex because these theories occur at same time. Thus, it is necessary to consider the factors separately. And it is important to understand the bonding mechanism on interfaces in adhesive joint and to improve the reliability of the joint strength more. In this study, the tensile strength of single lap joint was measured in order to investigate the influence of various surface treatments and strength characterization of adhesive. Specimens consist of aluminum alloy plates (A6061). Large-area electron beam (EB) and plasma were used for surface treatment. Each one of specimens were examined from the view of wettability, roughness parameter. Compared with unirradiated specimens, other joints improved the wettability and tensile strength. The inference of large-area EB irradiation on adhesive mechanism was discussed.

Strength characterization of assemblies of polymers, made by laser welding

2015 ◽  
Vol 103 (5) ◽  
pp. 503
Author(s):  
Vladimir Gantchenko ◽  
Jacques Renard ◽  
Alexander Olowinsky ◽  
Gerhard Otto
Keyword(s):  
Laser Welding ◽  
Strength Characterization
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