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Vosteen, L. F.

Publications and source records attributed to Vosteen, L. F..

12 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1985

Tough composite materials: Recent developments

The present volume broadly considers topics in composite fracture toughness and impact behavior characterization, composite system constituent properties and their interrelationships, and matrix systems' synthesis and characterization. Attention is given to the characterization of interlaminar crack growth in composites by means of the double cantilever beam specimen, the characterization of delamination resistance in toughened resin composites, the effect of impact damage and open holes on the compressive strength of tough resin/high strain fiber laminates, the effect of matrix and fiber properties on compression failure mechanisms and impact resistance, the relation of toughened neat resin properties to advanced composite mechanical properties, and constituent and composite properties' relationships in thermosetting matrices. Also treated are the effect of cross-link density on the toughening mechanism of elastomer-modified epoxies, the chemistry of fiber/resin interfaces, novel carbon fibers and their properties, the development of a heterogeneous laminating resin, solvent-resistant thermoplastics, NASA Lewis research in advanced composites, and opportunities for the application of composites in commercial aircraft transport structures.

Vosteen, L. F.↗
NASA NTRS1980

Composite aircraft structures

In late 1975, the Aircraft Energy Efficiency (ACEE) program was initiated by NASA in order to accelerate the development of selected technologies which showed promise for substantial improvements in the fuel efficiency of commercial transport aircraft. A description is presented of the status of the composite structure development programs which form one of the six sections of the ACEE program. Six aircraft components are currently being developed under NASA contract by three major transport manufacturers. The components include the upper aft rudder of the Douglas DC-10, the inboard ailerons of the Lockheed L-1011, the elevators of the Boeing 727, the vertical stabilizers for the Lockheed L-1011 and Douglas DC-10, and the horizontal stabilizers of the Boeing 737. It is found that the composite components show a high potential for achieving cost comparability with the metal parts they are designed to replace.

Vosteen, L. F.↗
NASA NTRS1978

Introduction to session on materials and structures

A review was given of the development of composites for aircraft. Supporting base technology and the Aircraft Energy Efficiency Composites Program are included. Specific topics discussed include: (1) environmental effects on materials; (2) material quality and chemical characterization; (3) design and analysis methods; (4) structural durability; (5) impact sensitivity; (6) carbon fiber electrical effects; and (7) composite components.

Vosteen, L. F.↗
NASA NTRS1978

Composite structures for commercial transport aircraft

The development of graphite-epoxy composite structures for use on commercial transport aircraft is considered. Six components, three secondary structures, and three primary structures, are presently under development. The six components are described along with some of the key features of the composite designs and their projected weight savings.

Vosteen, L. F.↗
NASA NTRS1978

Composite structures for commercial transport aircraft

The use of composites represents one of six possible approaches which, according to a NASA program initiated in 1975, could be used collectively to reduce the fuel consumption of commercial transport aircraft by up to 50 percent. A description is provided of a NASA-industry program which will lead to a more extensive use of advanced composites. The approach being taken is to develop, for existing aircraft, components which have potential for significant weight savings. The design of each of the considered components is described, taking into account a graphite/epoxy rudder, an inboard aileron, a graphite-epoxy elevator, a vertical tail, a horizontal tail, and a vertical stabilizer. The components are in various stages of development at this time. Preliminary weight estimates show from 25 to 30 percent weight savings from the use of composites.

Vosteen, L. F.↗