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Experimental and analytical Solution using classical shell theory solve by Matlab software was used to found thermal stresses under thermal load for natural composite materials pipe. Jute fibres were used in this work and reinforcements with polyester-resin. The experimental work including the manufacturing of the test samples (jute fibres/polyester) with different types of fibres orentiation (0°, 45°, 90°) by resin casting method. The volume fraction is 40%. Tensile and thermo-mechanical test were performing to find the mechanical properties of the specimens The results showed that Angle -ply fiber orientation natural composite had the highest strain and stress compared with cross-ply fiber orientation natural composite.

This paper examines the effect of changing temperature on the curved natural composite material pipe (Walnut husks powder with polyester) and curvature angle θ= 34° practically. This work involves the design and fabricates of curved pipe samples with an angle of curvature θ=34° at 50 % weight fraction. Also, tensile and thermo-mechanical test were performing to find the mechanical properties of the specimens. Experimental work included design and manufacturing test rig to simulate thermal stress. The experimental results revealed that a maximum hoop strain and longitudinal strain increased with increasing the temperature. The hoop stresses at crown and intrados positions were more than the hoop stress at extrados position by 150.762% and 138.363% respectively, and the von mises stresses at crown and intrados positions were more than the von mises stress at extrados position by 218.259% and 178.193% respectively. In the curved pipe, the hoop strains at intrados and crown positions were more than the hoop strain at extrados position by 114.583% and 60.416% respectively.

Experimental and analytical solution using classical shell theory solve by Matlab software was used to found thermal stresses under thermal load for natural composite materials pipe. Two types of natural fibers (eggshell and ash of fire wood) were used as reinforcements with polyester-resin. The experimental work including the manufacturing of the test samples (eggshell/polyester and ash of fire wood/polyester) by resin casting method with 40% volume fraction. Tensile and thermo-mechanical test were performing to find the mechanical properties of the specimens The results showed that eggshell natural composite had the highest strain, stress, and good mechanical properties compared with ash of fire wood natural composite but regarding temperature withstand the ash of fire wood specimens had the highest compared with egg shell specimens.

This study focused on the electrical and thermal properties of many natural composite material specimens. In this study, three kinds of composite materials were used epoxy, jute, and fibreglass. The first type was epoxy-strengthened glass fibre with volume fraction (50%), the second type of Hybrid natural jute, and glass fibre strengthened epoxy of (50%) thickness proportion (25%glass fibre + 25 %jute). Finally, the third type of natural fibre (jute) was strengthened with a volume fraction of epoxy (50%). This research was studied the thermal and electrical conductivity for three types of composite. Results revealed that the values of thermal conductivity and electrical conductivity for fibreglass/epoxy composite samples outweigh two other forms.

In this study, the influences of eggshell powder application on random fiberglass/polyester composite pipes thermal stresses were investigated experimentally and numerically. The experimental part involved industrializing tube samples which are Egg Shell Powder with Polyester at 50% volume fraction.(E50), Random Fiberglass with plyester at 50% volume fraction (F50) and Egg Shell Powder with Random Fiberglass with Polyester at 50% volume fraction (E25F25). Resin molding procedure and experimental rig design to study how tube samples are faced with thermal loads. Pipes are made with (95 mm) inner diameter, (400 mm) circumference, and (5 mm) wall thicknesses. Computational Fluid Dynamic, ANSYS software package version 11, is simulated with product form SHELL63. Results show that, composite samples (F50) had an average longitudinal strain, while composite samples (E50) had a low longitudinal strain. The composite (F50) had average longitudinal and hoop stress (62.2 MPa, and 61.1 MPa) respectively, while the composite (E50) had low longitudinal hoop stress (28.5 MPa, ad 30.8 MPa) respectively.

The effect of shot penning on wear rate of natural materials was investigated experimentally. Egg shell - polyester was used in this experiment using (30% and 55%) weight fraction. The samples were affected on shot penning for two different times (2 min and 6 min) with variation of solidification times (six, four and two days). The wear rate and mechanical properties of natural composite samples (with and without shot penning) were found. The hardness tester for natural composite samples was done. The resultant shows that, the increasing weight fraction causes increasing of solidification of natural composite materials. The egg shell-polyester (55%) weight fraction samples have mechanical properties and reduction wear rate better than egg shell - polyester (30%) weight fraction samples. The increasing time of shot penning causes reduction in wear rate. The egg shell (55%) weight fraction natural composite material has good resistance to wear rate under shot penning. The suitable shot peening time for fiber egg shell natural composite materials is equal or less than 6 min.

An experimental investigation of different thermal energy storage materials in the solar collector is studied in this paper. Both, sensible energy storage materials and latent heat storage materials (PCMs) are used to enhance the storage system of thermal energy. The size of the tested solar collector 2 m*0.8m*0.15 collector length, width, height. Experimental results obtained from the proposed model indicate that the solar collector model, having a composite of paraffin wax with 5% aluminum powder can continuous operation, and the maximum air temperature difference (ΔT) between air enter to collector and exit from the collector if the ambient of 24.7 °C, the effect on the efficiency of the collector

This paper study experimentally the effect of changing the angle of curvature pipe made from natural composite materials (eggshell powder with polyester) under thermal load. This work involves the design and fabricate of straight and curved pipe samples with difference angle of curvatures (34° and 48°) at 50 % weight fraction. Three composite pipes were tested (straight pipe, curved pipe with angle 34°, and curved pipe with angle 48°). Tensile and thermo-mechanical test were performing to find the mechanical properties of the specimens. Experimental work included design and manufacturing test rig to simulate thermal stress. The experimental results revealed that a maximum hoop strain and longitudinal strain increased with increasing the temperature for all test pipes. The longitudinal stresses at crown and intrados positions were more than the longitudinal stress at extrados position by 258 % and 199 % respectively and the von mises stresses at crown and intrados positions were more than the von mises stress at extrados position by 180 % and 165 % respectively. In the curved pipe with angle 48°, the hoop strains at intrados and crown positions were more than the hoop strain at extrados position by 78 % and 37 % respectively.

This work is an experimental and numerical approach to analyze the effect of Nano powder additives and temperature on the critical crack length in fiber reinforced composite materials (FRC) exposed to uniaxial tensile load. Fiberglass/Epoxy compact tension test samples (CT) are prepared according to ASTM standard E399. Tio2 Nano powder is added by 2% wt to the resin to other samples. The static tensile test is applied to the samples and the results for crack length/time are discussed. ABAQUS/CAE software is used to simulate the case. The numerical and experimental results were close. The experimental results showed that the addition of 2%wt Tio2 Nano powder increased the critical crack length by 32.4%. The effect of ambient temperature is studied too by applying the experimental test on the fiberglass/Epoxy samples in room temperature (30°C) once and at outdoor (60°C) temperature. The results showed that the effect of the temperature increase decreased the critical crack length by 51%. The numerical results determined the fracture toughness (KIC) for the fiberglass/Epoxy samples to be 491 pa.mm0.5 and 517 pa.mm0.5 for the fiberglass/Epoxy-Nano powder samples.

In this work, the effect of nano carbon black particles (N220) on creep behaviour of epoxy-fibres carbon composites was study. The nano composites were prepared with (2, 3and 4 wt %) of carbon black nanoparticles using ultrasonic wave bath machine dispersion method. The creep test was performed by using creep test rig for carbon- epoxy composite specimen with and without add carbon black nanoparticles. The volume fraction of this work (volume of carbon fiber to volume of composites specimen) was 30 %. The result show that, there is an improvement on the creep strain behaviour (10 %), (12.5 %) and (19%) for the specimen with nano carbon (2%), (3%) and (4%) wt % respectively.