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Stringpiece with bulb made of composite material

A technology of composite materials and balls, applied in the direction of joists, girders, trusses, etc., can solve the problems of easy damage, increased delamination, etc.

Inactive Publication Date: 2008-11-05
AIBUS ESPAA SL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] With these methods it is possible to increase the modulus of elasticity of the web of the stringer without increasing the thickness of the foot of the stringer, but this does not address the problem of susceptibility to damage; in fact it is worse because the construction is prone to delamination areas Has two joints, making delamination more likely

Method used

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  • Stringpiece with bulb made of composite material
  • Stringpiece with bulb made of composite material
  • Stringpiece with bulb made of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] First the T-stringer 11 will be discussed.

[0031] These stringers 11 are formed by: webs 13, which are elongated sections perpendicular to the feet (or perpendicular to the panels) of the stringers 11; out) contact and function as a means of connecting the panel to the stringer; and a stiffener 17 arranged at the end of the web 13 opposite to the foot 15, the stiffener 17 forming a terminal portion having the shape of a bulb .

[0032] exist Figure 11 , you can see that the stringer is manufactured in multiple steps.

[0033] In step a) one starts with a planar laminate made of composite material 41 formed from plies of carbon fibers or glass fibers with a thermosetting or thermoplastic resin.

[0034] In step b), said laminate is shaped to define two parts 43 and 45 that will form the foot 15 and two parts 47 and 49 that will form the web 13 . This forming step can be carried out in different ways, for example, using rollers, continuously or semi-continuously by...

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PUM

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Abstract

The invention relates to a stringer (11, 21, 31) which is made from a composite material and which is used to stiffen composite panels, particularly those used in the aeronautical industry. The inventive stringer is formed by a base (15) which is used to join same to the panel and a structural element (13, 23, 33) which is equipped with a structural reinforcement (17, 27, 37) at the end opposite the base (15), said structural reinforcement being made from high-modulus unidirectional fibres of the same material as the stringer or another compatible material. The invention also relates to a method of producing said stringer.

Description

technical field [0001] The invention relates to a stringer made of composite material (carbon fiber or glass fiber, with thermosetting or thermoplastic resins) having a T-, J- or I-shape for reinforcement made of composite material and more Panels made in particular of materials used in the aviation industry. Background technique [0002] The stringers are used to obtain a panel capable of supporting loads, in particular compressive and shear loads, in the plane of the panel without having to increase the thickness of the panel. These stringers provide sufficient rigidity to the panels to support loads without adding significant weight to the structure. [0003] When the stringer is made of composite material, the most common shapes for the stringer are usually T-, C-, Ω-, I-, J- and U-shaped. [0004] For the manufacture of T-shaped stringers (see figure 1 ), first making a planar laminate which is then shaped to obtain an L-shaped profile. After gluing the L-shaped pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/46B29C70/54B64C1/06B29D31/00B29L31/30B29D99/00
CPCB64C2001/0072Y02T50/43Y02T50/433E04C3/28E04C3/29B64C1/064Y02T50/40
Inventor 佩德罗·路易斯穆诺斯罗约弗朗西斯科·埃斯科瓦尔贝纳维斯德奥古斯托·佩雷斯帕斯托尔伊格纳西奥·波夫拉西翁加西亚
Owner AIBUS ESPAA SL
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