STUDY AND MECHANICAL TESTING OF FIBER REINFORCED PLASTIC LAMINATE AND CARBON FIBER LAMINATE COMPOSITE

The use of composite materials at industrial and domestic levels is increasing day by day, due to which the work in the direction of enhancing its mechanical property is being on a fast pace. In this study, the mechanical properties of Polyester resin and Carbon Fibre Composite were analyzed experimentally. Tensile and Compressive strength of the specimen were determined and compared. It was found both laminates together provides a positive impact in the enhancement of mechanical properties of the composite

Mechanical testing of advanced coating system, volume 1

The Electron Beam Physical Vapor Deposition (EBPVD) coating material has a highly columnar microstructure, and as a result it was expected to have very low tensile strength. To be able to fabricate the required compression and tensile specimens, a substrate was required to provide structural integrity for the specimens. Substrate and coating dimensions were adjusted to provide sufficient sensitivity to resolve the projected loads carried by the EBPVD coating. The use of two distinctively different strain transducer systems, for tension and compression loadings, mandated two vastly different specimen geometries. Compression specimen and tensile specimen geometries are given. Both compression and tensile test setups are described. Data reduction mathematical models are given and discussed in detail as is the interpretation of the results. Creep test data is also given and discussed

Mechanical testing of polyurethane foams to cover lower limb prostheses

Despite the aesthetic and functional importance of foam cosmeses, the foam mechanical behaviour has not been quantified in the literature. This paper reports the results of testing two commonly used foams to determine their material properties. The works aims to enable the FEA modelling of cosmeses

Aluminum-to-copper coldwelded joints for SNAP-8 electrical terminal applications

Mechanical testing and metallographic examination of aluminum to copper coldwelded joints after thermal exposure - SNAP-8 electrical termina

Testing methods and techniques: A compilation

Mechanical testing techniques, electrical and electronics testing techniques, thermal testing techniques, and optical testing techniques are the subject of the compilation which provides technical information and illustrations of advanced testing devices. Patent information is included where applicable

Stress Rupture Behavior of Silicon Carbide Coated, Low Modulus Carbon/Carbon Composites

The disadvantages of carbon-carbon composites, in addition to the oxidation problem, are low thermal expansion, expensive fabrication procedures, and poor off axis properties. The background of carbon-carbon composites, their fabrication, oxidation, oxidation protection and mechanical testing in flexure are discussed

Mechanical testing of nanotwinned alloys

There has been much interest recently in nanotwinned metals due to their potential for simultaneous high strength and ductility. By introducing alloying elements, one can modify the stacking fault energy of the material, allowing for the synthesis of fully twinned structures with controlled microstructures. In this study, fully nanotwinned Cu-based binary alloys and Inconel 600 were synthesized by magnetron sputtering with stacking fault energies ranging from 6 to 60 mJ/m2, mean twin thicknesses ranging from 4 to 22 nm, and mean grain sizes ranging from 80 to 260 nm. Tensile and tension-tension fatigue behavior of these materials was determined with a custom-built small-scale tensile tester utilizing DIC to generate in-situ strain maps. The effects of varying microstructure are examined for different alloy systems in order to understand the effect of alloying elements in the mechanical behavior. The samples displayed yield strengths ranging from 830 to 1340 MPa for the Cu-based alloys and up to 2400 MPa for the Inconel 600, varying with both alloy content and microstructural parameters. Nanoindentation tests were also used to evaluate the deformation behavior for dual microstructures of twinned and non-twinned grains in order to identify optimum ductility

Mechanical Testing of Artificial Muscles

This document focuses on the design and fabrication of a low cost instrument to measure the strain of the artificial muscles being researched and developed by Dr. Amanda Murphy and her team at Western Washington University. The instrument utilizes a laser displacement meter to measure the movement of the artificial muscles during actuation. All project objectives and goals were successfully met, and all deliverables completed. Instrument quality and strain testing results are analyzed and recommendations for future work are suggested based on the results of the project

Ultrasonic, molecular and mechanical testing diagnostics in natural fibre reinforced, polymer-stabilised earth blocks

The aim of this research study was to evaluate the influence of utilising natural polymers as a form of soil stabilization, in order to assess their potential for use in building applications. Mixtures were stabilized with a natural polymer (alginate) and reinforced with wool fibres in order to improve the overall compressive and flexural strength of a series of composite materials. Ultrasonic pulse velocity (UPV) and mechanical strength testing techniques were then used to measure the porous properties of the manufactured natural polymer-soil composites, which were formed into earth blocks. Mechanical tests were carried out for three different clays which showed that the polymer increased the mechanical resistance of the samples to varying degrees, depending on the plasticity index of each soil. Variation in soil grain size distributions and Atterberg limits were assessed and chemical compositions were studied and compared. X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), and energy dispersive X-ray fluorescence (EDXRF) techniques were all used in conjunction with qualitative identification of the aggregates. Ultrasonic wave propagation was found to be a useful technique for assisting in the determination of soil shrinkage characteristics and fibre-soil adherence capacity and UPV results correlated well with the measured mechanical properties