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This paper presents experimental results of S-glass fabric prepreg composite material to determine the compressive strength of uncertain S-glass fabric prepreg coupons along warp and weft direction at room temperature environment. A coupon is a small sample of the material under test that has been prepared in such a way that the failure mechanism will be representative of the larger production. Universal testing machine (UTM) was used for experiment. One of the hydraulic grips was fixed on the crosshead and the other grip was fixed on the hydraulic piston of the UTM. A load cell was provided on the crosshead for measuring the applied load. Uncertainty in the manufacturing process of S-glass is very important. Reducing the rejection rate of parts by selecting the right reinforcement, matrix and controlled process during the manufacturing process is very important which ensures the quality and performance of the manufactured parts as per application.

A load cell is the representative converter that changes load to the quantity of electricity. The load cell is used to a large mechanical structure and offshore structures to measure the force. Currently, the load cell using electrical strain gauges are commonly used. Basic measuring principle of electrical strain gauge is the electrical method. A load cell with electrical strain gauges is not available in the electromagnetic and corrosion environment. A Fiber Bragg Grating (FBG) sensor is not affected by the EMI (Electro Magnetic Interference)/EMC (Electro Magnetic Compatibility) and is strong in corrosion under the sea water. In this paper, we use the FBG sensors to make a load cell under the sea water condition and the electromagnetic environment and show FBG sensors' availability.

A skin is an indispensible organ for humans because it contributes to metabolism using its own biochemical functions and protects the human body from external stimuli. Recently, mechanical properties such as a thickness, a friction and an elastic coefficient have been used as a decision index in the skin physiology and in the skin care market due to the increased awareness of wellbeing issues. In addition, the use of mechanical properties is known to have good discrimination ability in the classification of human constitutions, which are used in the field of an alternative medicine. In this study, a system that measures mechanical properties such as a friction and an elastic coefficient is designed. The equipment consists of a load cell type (manufactured by the authors) for the measurements of a friction coefficient, a decompression tube for the measurement of an elastic coefficient. Using the proposed system, the mechanical properties of human skins from different constitutions were compared, and the relative repeatability error for measurements of mechanical properties was determined to be less than 2%. Combining the inspection results of medical doctors in the field of an alternative medicine, we could conclude that the proposed system might be applicable to a quantitative constitutional diagnosis between human constitutions within an acceptable level of uncertainty.