Material requirements planning

deposition, it is possible to produce alloy and compounds of metals and nonmetal materials. Chemical vapor deposition can be defined as the deposition of a solid on a heated surface from a chemical reaction in the vapor phase [2]. Chemical vapor deposition belongs to the class of vapor-transfer processes. Differ from physical vapor deposition, CVD process includes chemical reactions. In the process, gaseous material change in to solid which means the process is…

Electronic Waste Recycling Management Nowadays, the production of electronic waste or e-waste is one of the fastest growing waste streams. Growing consumption of electronic items makes e-waste become a major issue around the world. As a matter of fact, today’s people are upgrading their electronic more frequently than before. The invention of electronic has made people life much more easier. Almost all the thing that surrounds people in the society has direct link to electronics such as…

4.1 First Side by Side Geometry The first model shown in figure 3 was for twin tunnels already constructed at a centre to centre spacing of 3D. This model helped to identify the influence of construction sequence on surface and subsurface ground displacement upon excavating the first and second tunnels underneath the existing twin tunnels. Figure 3: First Side by Side twin tunnels 4.1.1 Surface Displacements The surface displacements at distances of 4.75m, 7.125m, 9.5m and 11.875m from the…

Introduction We cannot compare anything to breathing clean and fresh air. But today, are we breathing clean air? The gases you're taking up by our noise could be slowly killing us. World Health Organization says in their report, in every year about two million people die too early due to the effects of polluted air. Air pollution is a large problem and it is not a problem of people only, the problem of the world also, through such things as global warming and damage to the ozone layer, it has…

These are similar to mineral component that present in bones and hard tissues (Ilie et al., 2016). The combination of ceramic based materials - hydroxyapatite and natural polymer as sodium alginate will provide strength, stiffness and fracture toughness to bone (S. Lala et al., 2016). The composite materials have been used in load bearing application such as filler and bone defect. Alginate (Alg) is a natural polymer which synthesized from brown algae. Alginate is more…

these sides of the cube have near vertical cracks at the cube center. Figure (4.3): Failure pattern of cubes specimens (C1). 4.2.3. Static Modulus of Elasticity: Modulus of elasticity is a necessary parameter to determine the stresses in materials and structures. Even though concrete has nonlinear stress-strain behavior,…

1.1 What is a composite material? Composite materials are materials in which a homogenous matrix is reinforced by a stronger and stiffer constituent that is usually fibrous but may have a particulate or other shape (web.mit.edu). They are produced when two or more materials or phases are used together to give a combination of properties that cannot be attained otherwise. For example steel reinforced concrete, plywood and fibre glass. 1.2 What is a Ceramic Matrix Composite (CMC)? CMCs are a…

2.9 Material Properties 2.9.1 Hardness Test Hardness is defined as a measure of a material’s resistance to contained plastic deformation (e.g., a small dent or scratch). Hardness testing comprises a small indenter being enforced into the surface of the material being confirmed under organized circumstances of load and rate of application. The depth or size of the resulting indentation is measured, which in turn is linked to a hardness number; weaker the material, indentation will be the…

temperatures. Stretch forming is a method that combines controlled tension and bending of sheet material around dies to produce accurately contoured parts. It is extensively used in the aerospace industry to form large sheet panels of mild curvature, e.g. the leading edge of a wing. A commonly used material for aircraft skins is the heat-treatable aluminum alloy AA 2024. Possible failure modes during forming of this material are necking, wrinkling, $L\ddot{u}$ders lines or orange peel. In order…

Result 4.1 Experimental Analysis The experimental work is carried out to evaluate the shear strength of steel fiber reinforced concrete deep beams without stirrups. For this 18 beams are cast. The beams are tested under two-point loading as per IS after 28 days curing. Fiber fraction is varied as 0%, 1.5% and 3%. The shear span-to-depth ratio (a/d ratio) for beams is kept as 0.60 for case-I and 0.74 for case-II. The cube compressive strength is estimated. The experimental results are…