Door lightweight

BeryUium is used in the space shuttle orbiter as window frames, umbUical doors, and the navigation base assembly. An important appHcation for beryUium is inertial guidance components for missiles and aircraft. Here the lightweight, high elastic modulus, dimensional stabUity, and the capabUity of being machined to extremely close tolerances are aU important. 

Lightweight mats of fibres, which can be die-cut and thermally moulded, can be applied behind any interior trim panel, door panels, headliners or package shelves as superior sound absorbers. 

Rail- Cross members of panel doors or of a sash. Also, a wall or open balustrade placed at the edge of a staircase, walkway bridge, or elevated surface to prevent people from falling off. Any relatively lightweight horizontal element, especially those found in fences (split rail). 

Shutter- Usually lightweight louvered decorative frames in the form of doors located on the sides of a window. Some shutters are made to close over the window for protection. 

Polypropylene (PP) in various forms (filled, unfilled, reinforced, rubber blended) finds the greatest usage of all automotive plastics. Its consumption is likely to accelerate as a result of new laws requiring recyclability, and because of the weight and cost reductions it offers. New fabrication techniques may also contribute to growth. For example, the monomaterial sandwich construction techniques developed by fabricators yield rugged and lightweight PP-based instrument and door panels. These parts consist of a sandwich of reinforced or neat PP substrate, a cross-linked PP foam, and a thermoplastic polyolefin elastomer (TPO) cover. 

Figure 4.14. Lightweight door pane. [Adapted fiom Dodson, G C. Takagi, K., US Patent 6.513,862, Feb. 4,2003.]...

Lightweight PVC door panel for trucks and the method of assembly. 

A major use of Kevlar is in rigid and soft body armour protective applications. Kevlar fabric is bullet and fragment resistant, lightweight, flexible and comfortable, has excellent thermal properties, is resistant to cuts and chemicals and is flame resistant and self-extinguishing. The uses include bulletproof vests, chainsaw leg protection and military uses for helmets and armoured vehicles, cargo containers, armour shields and cockpit doors. 

Rigid PVC is lightweight, stiff, hard and tough at room temperature and can be used outdoors when suitably stabilised. Applications include pipes, guttering and fittings, doors and windows, frames, bottles and containers. 

Wood is the most appropriate material for a solid sandwich core and has been used extensively for many applications, such as doors and partitions. For lightweight constructions flat or end grain balsa is still used, although this is being superseded by synthetic materials. Bonded microspheres of inorganic materials, glass, ceramics, etc. to form syntactic foams are useful core materials. 

UPE resins can be used as clear castings or in combination with particulate fillers or fibres. The resin was developed to meet the demand of lightweight materials in military application. The first functional use of UPE was in radome. Because of the obvious advantages of easy processability and low cost, it was used in a wide range of applications in civil sectors such as tanks, pipes, and electronic gears. Some of the important products based on cast UPE resins are encapsulation of electronic assembly, buttons, door handles, knives, umbrellas, industrial wood and furniture finishing. A filled resin system using limestone, silica, and china clay are used for floor tiles. The major use of UPE is as a matrix for fibre-reinforced composites. Such composites have wide applications in automobile and construction industries such as boats, water-skis and television antennae. Examples of applications of UPE resins are presented in Table 2.7. 

Further studies have focused on applying lightweight design to obtain a mass reduction, whereby several design parameters are varied and simulated in order to search and manufacture a suitable, totally new material. Examples have consisted of running finite element analysis (FEA) and optimizations to search suitable materials, configuration and topology of a side door [23]. 

Figure 9.25 Lightweight door module with compression molded Twintex. (Courtesy of Vetrotex CertainTeed.)...

By the same token, in the study by Mangino et al. (2007), it has been also demonstrated that composites are lightweight, fatigue resistant and easily moulded to shape. Polymers and composites have gradually replaced steel for body parts (bumpers, wings, hatch doors, spare wheel container) and many cabin features (Renault document - Shedding weight - Sheet 31, 2009). 

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