Stock material or miscellaneous articles – Sheet including cover or casing – Noninterengaged fibered material encased
Patent
1992-08-18
1994-09-06
Bell, James J.
Stock material or miscellaneous articles
Sheet including cover or casing
Noninterengaged fibered material encased
416229A, 416229R, 416230, 428114, 428192, 428285, 428294, 428902, B32B 104
Patent
active
053446860
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a tension strained fiber structure component which, at least on one end, has supporting surfaces deviating from the direction of the tension for the form-fitting support on a separate supporting component.
Fiber structure components are capable of processing very high tensile strains with breakage and are therefore, and because of their low weight, suitable for transmitting such tensile loads. One problem in this case, however, is the introduction of force from the fiber structure component into a supporting element absorbing the tensile forces because it is necessary that only very low shearing strains occur during the introduction of force or that they must be avoided altogether because the shearing strength of composite fiber materials is considerably below the tensile strength.
An ideal introduction of force is obtained when the fiber structure component is constructed of loops and a cross pin, which is mounted between the loops and is supported in the supporting housing, transmits the forces. Only slight shearing or transverse forces or shearing strain occur in the case of this known solution. However, it is a disadvantage of this solution that, for achieving a uniform straining of all fiber strands, a relatively large inside loop diameter is required which results in a large overall volume in the fastening area.
Based on the above, it is an object of the present invention to provide a tension strained fiber structure component which can be form-fittingly supported at least on one end and which, in the fastening area, requires only little additional space and, as a result of which, at the same time, a distribution of forces and tension is achieved that is as advantageous as possible for the fibers.
According to the invention, this and other objects are achieved by a tension strained fiber structure component having supporting surfaces which deviate from a tension direction for form-fitting support on a separate supporting component, constructed of a plurality of fiber strand plates which are aligned in parallel in the tension direction and between which pressure plates are embedded which have sections projection beyond the cross-section of the fiber strand plates which absorbs tensile strain, and which form supporting surfaces.
The basic idea of the invention consists of the fact that the tension strained component is divided into two types of differently constructed elements. The pressure plates are used for absorbing pressure forces and shearing forces and are in form closure with the supporting component which surrounds them. The plate-shaped fiber strands, on the other hand, are used for absorbing tensile forces. The connection of the pressure plates and the fiber strand plates takes place by means of embedding so that a uniform bonding is created. By placing in a row next to one another a plurality of thin pressure plates and fiber strand plates, the possibility is provided of reducing the occurring shearing strains to such an extent that the tensile strength of the fiber can be utilized completely. The number of the used elements (that is, one pressure plate and one fiber strand plate respectively) depends on the given dimensions of the component and the selected strengths of the plate thickness.
The most important advantages of the invention are that the force transmission between the tension strained fiber strand plates and the pressure-loaded pressure plates takes place over a large surface, whereby the occurring shearing strains are kept low and do not reduce stability. By placing a large number of elements of the same type, which are connected with one another, next to one another in a row, the width of the fiber structure element can be varied easily, whereby adaptations can be carried out to the occurring strains. Finally, little space is required in order to support the component on a separate supporting component because the pressure plates must project only slightly laterally beyond the fiber strand plates.
Preferably, the pressure plates are made of a homogen
REFERENCES:
patent: 4673606 (1987-06-01), Unden et al.
patent: 4935291 (1990-06-01), Gunnick
patent: 5227216 (1993-07-01), Pettit
Bell James J.
MTU Motoren - und Turbinen-Union Muenchen GmbH
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