DE3836442A1 - Impact-resistant material for flying objects - Google Patents
Impact-resistant material for flying objectsInfo
- Publication number
- DE3836442A1 DE3836442A1 DE3836442A DE3836442A DE3836442A1 DE 3836442 A1 DE3836442 A1 DE 3836442A1 DE 3836442 A DE3836442 A DE 3836442A DE 3836442 A DE3836442 A DE 3836442A DE 3836442 A1 DE3836442 A1 DE 3836442A1
- Authority
- DE
- Germany
- Prior art keywords
- thermoplastic
- layers
- material according
- impact
- reinforced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08L79/085—Unsaturated polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
- B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
Description
Die Erfindung betrifft einen Werkstoff für schlagbean spruchte Bauteile nach dem Oberbegriff des Anspruchs 1.The invention relates to a material for whipped beans wanted components according to the preamble of claim 1.
Bekannt sind Flugzeuge, die vollständig aus faserverstärktem Kunststoff hergestellt sind. Bei diesen Flugzeugen werden Duroplaste eingesetzt. Diese verstärkten Duroplaste haben eine hohe Kerbempfindlichkeit. Einschläge durch Vogelschlag oder aufgewirbelte Steinchen können zur Auflösung des Schichtverbundes führen.Airplanes are made entirely of fiber-reinforced Plastic are made. With these aircraft Thermosets used. Have these reinforced thermosets high notch sensitivity. Bird strikes or whirled stones can dissolve the Lead shift network.
Aufgabe der Erfindung ist es, einen Werkstoff für schlagbe anspruchte Bauteile, wie Vorderkanten von Tragflächen oder Leitwerken an Fluggeräten oder an Karosserieteilen von Fahr zeugen vorzuschlagen, die eine verbesserte Impaktbeständig keit haben.The object of the invention is to provide a material for impact stressed components, such as leading edges of wings or Tail units on aircraft or body parts of Fahr testify to propose an improved impact resistant to have
Diese Aufgabe wird erfindungsgemäß gelöst von einem Werk stoff mit den Merkmalen des Anspruchs 1. Ausführungen der Erfindung und ein Herstellungsverfahren sind Gegenstände von Unteransprüchen.According to the invention, this object is achieved by a work fabric with the features of claim 1. Executions of Invention and a manufacturing process are subjects of subclaims.
Durch das Einbringen von thermoplastischen Folien gelingt eine wesentliche Verbesserung der Impaktbeständigkeit und des Durchbrandverhaltens der duroplastischen Faserverbund werkstoffe. Die Kerbempfindlichkeit wird wesentlich redu ziert. Die Schwingungsfestigkeit wird durch die Zähigkeit der Thermoplastfolie verbessert. Auch das Brandverhalten des Bauteils wird durch die Thermoplastfolie als Brand sperrschicht verbessert. Auftretende Schäden breiten sich durch die elastischen Eigenschaften der Thermoplastfolien nicht durch das ganze Bauteil auf, Ablösungen von Schich ten erfolgen kaum mehr. Dadurch ist die Damagetoleranz ver bessert. Die Thermoplaste verringern zusätzlich die feuchte Aufnahme des Werkstoffs, da sie als feuchte Sperrschichten wirken. Das Gewicht des Bauteils steigt nicht wesentlich.By inserting thermoplastic films a significant improvement in impact resistance and the burn-through behavior of the thermosetting fiber composite materials. The notch sensitivity is significantly reduced graces. The vibration resistance is determined by the toughness the thermoplastic film improved. Also the fire behavior of the component is caused by the thermoplastic film as a fire barrier layer improved. Damage that occurs spreads due to the elastic properties of the thermoplastic films not through the entire component, detachments from Schich hardly anymore. This means that the tolerance for damage is ver improves. The thermoplastics also reduce the moisture Absorption of the material as it acts as a damp barrier Act. The weight of the component does not increase significantly.
Erfindungsgemäß wechseln sich die Schichten von Duroplast und Thermoplast gegenseitig ab, wobei bevorzugt außen Duro plastschichten liegen. In einem Beispiel sind 16 Duroplast prepregs mit 15 dazwischenliegenden Lagen Thermoplastfolie verbunden. Möglich ist sowohl ein unidirektionaler als auch ein multidirektionaler Lagenaufbau.According to the invention, the layers of thermoset change and thermoplastic from each other, preferably outside Duro plastic layers lie. In one example, 16 are thermosets prepregs with 15 layers of thermoplastic film in between connected. Both a unidirectional and is possible a multi-directional layer structure.
In einer Ausführung liegt die Dicke der Thermoplastschichten zwischen 0,2 und 0,01 mm. Sie liegt bevorzugt zwischen 0,01 und 0,02 mm. Die Dicke der Duroplaste übersteigt in der Regel die der Thermoplastschichten. Im Ausführungsbeispiel sind es 0,125 mm.In one embodiment, the thickness of the thermoplastic layers is between 0.2 and 0.01 mm. It is preferably between 0.01 and 0.02 mm. The thickness of the thermosets exceeds in the Rule of thermoplastic layers. In the embodiment it is 0.125 mm.
Die Thermoplastschichten können sowohl verstärkt als auch unverstärkt eingesetzt werden. Besonders günstig ist es, Folien zu verwenden.The thermoplastic layers can be reinforced as well be used unreinforced. It is particularly cheap To use foils.
Als Duroplastwerkstoffe eignen sich Polyimid (PI), Bisma leinimid (BMI), modifizierte BMI-Systeme oder Expoxidharz systeme. Polyimide (PI), Bisma are suitable as thermoset materials linimide (BMI), modified BMI systems or epoxy resin systems.
Als Thermoplaste eignen sich besonders Polyetheretherketon (PEEK), Perfluorethylenpropylen (FEP), thermoplastisches Polyimid (PI).Polyetheretherketone are particularly suitable as thermoplastics (PEEK), perfluoroethylene propylene (FEP), thermoplastic Polyimide (PI).
Die Herstellung erfolgt erfindungsgemäß in einem Schritt, das heißt das Auflaminieren, das Bilden des Verbunds und das Aushärten der Duroplastprepregs geschieht gleichzeitig unter Einwirkung von Hitze und Druck. Alle bekannten Auto klav-, Preß- oder Wickeltechniken sind prinzipiell anwend bar.According to the invention, the production takes place in one step, that is, the lamination, the formation of the composite and the thermoset prepregs harden at the same time under the influence of heat and pressure. All known car In principle, clav, pressing or winding techniques are used bar.
Eine Ausführung der Erfindung wird anhand dreier Figuren gezeigt.An embodiment of the invention is based on three figures shown.
Es zeigen:Show it:
Fig. 1 Schnitte durch einen erfindungsgemäßen Werkstoff, FIG. 1 cuts through an inventive material,
Fig. 2 und 3 Ultraschalldarstellungen von Schäden nach einem Impakt an einem Bauteil des Standes der Technik (Fig. 2) und an einem erfindungsgemäßen Bauteil (Fig. 3). Fig. 2 and 3 ultrasound representations of damage following a impact on a component of the prior art (Fig. 2) and on an inventive component (Fig. 3).
Fig. 1 zeigt zwei Schnitte durch einen erfindungsgemäßen Werkstoff. Der Werkstoff besteht aus faserverstärkten Duro plastschichten D und unverstärkten Thermoplastschichten T. Der Duroplast ist hier mit unidirektionalen Fasern ver stärkt. Das obere Foto zeigt einen Schnitt senkrecht zu den Fasern, das untere Foto zeigt einen Schnitt parallel zu den Fasern. Die Fasern sind oben als helle Punkte zu erkennen, unten als helle Streifen. Zwischen den faserverstärkten Duroplastschichten D liegen abwechselnd die dunklen Thermo plastschichten T. Fig. 1 shows two sections through a material according to the invention. The material consists of fiber-reinforced Duro plastic layers D and unreinforced thermoplastic layers T. The thermoset is reinforced with unidirectional fibers. The upper photo shows a section perpendicular to the fibers, the lower photo shows a section parallel to the fibers. The fibers can be seen as light dots at the top and light stripes at the bottom. Between the fiber-reinforced Duroplastschichten D are alternately dark thermoplastic layers T.
Fig. 2 zeigt einen Ultraschall-Scan eines Werkstücks aus faserverstärkten Duroplastschichten ohne dazwischenliegende Thermoplastschichten. Das Werkstück ist am Rand eingespannt und wurde von einem Probekörper in der Mitte mit 24 J Ener gie getroffen. Deutlich zu erkennen sind die geschädigten Bereiche, in denen sich die Schichten voneinander gelöst haben. Da dort der Schall an den Grenzflächen diffus reflek tiert wird, erscheinen die geschädigten Bereiche auf dem Foto schwarz. Fig. 2 shows an ultrasonic scanning of a workpiece of fiber reinforced Duroplastschichten without intervening thermoplastic layers. The workpiece is clamped on the edge and was hit by a specimen in the middle with 24 J energy. The damaged areas in which the layers have come apart are clearly visible. Since the sound is diffusely reflected at the interfaces, the damaged areas appear black in the photo.
Fig. 3 zeigt einen Ultraschall-Scan eines Werkstoffs aus faserverstärkten Duroplastschichten mit erfindungsgemäß dazwischen angeordneten Thermoplastschichten. Nach Aufprall des gleichen Prüfkörpers mit der gleichen Energie ist nur ein geringer Schaden zu erkennen. Die schwarzen Schichten, die Auflösungen des Verbandes zeigen, sind wesentlich kleiner als bei dem Werkstoff, der nicht mit Thermoplast folien verstärkt wurde. Fig. 3 shows an ultrasonic scanning of a material of fiber-reinforced Duroplastschichten with the present invention interposed thermoplastic layers. After the impact of the same test specimen with the same energy, only minor damage can be seen. The black layers, which show dissolutions of the bandage, are much smaller than with the material that was not reinforced with thermoplastic films.
Claims (6)
- - mehrere faserverstärkte Duroplastschichten (D) und
- - mehrere dazwischenliegende Thermoplastschichten (T).
- - Several fiber-reinforced thermosetting layers ( D ) and
- - Several intermediate thermoplastic layers ( T ).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3836442A DE3836442A1 (en) | 1988-10-26 | 1988-10-26 | Impact-resistant material for flying objects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3836442A DE3836442A1 (en) | 1988-10-26 | 1988-10-26 | Impact-resistant material for flying objects |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3836442A1 true DE3836442A1 (en) | 1990-05-03 |
Family
ID=6365945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3836442A Ceased DE3836442A1 (en) | 1988-10-26 | 1988-10-26 | Impact-resistant material for flying objects |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3836442A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4404604A1 (en) * | 1994-02-14 | 1995-08-17 | Hella Kg Hueck & Co | Plastics lighting reflectors esp. for motor vehicle headlamps |
EP0730951A1 (en) * | 1995-03-04 | 1996-09-11 | British Aerospace Public Limited Company | A composite laminate |
WO1998038031A2 (en) * | 1997-02-27 | 1998-09-03 | Advanced Composites Group Ltd. | Improvements in or relating to moulding methods and moulded articles |
DE102009014973A1 (en) * | 2009-03-18 | 2010-09-23 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Shuttering element for land vehicles and air- or spacecrafts, comprises a self-supporting external wall having fiber-reinforced polymer materials, and an internal wall having thermoplastic reinforced with thermoplastic fiber |
DE102009037171A1 (en) * | 2009-08-03 | 2011-02-10 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Wall element for land-, aircraft- and space vehicle, comprises molded part made of fiber-reinforced plastic material and having outer surface, where plastic film is disposed on outer surface with high tensile strength in area-wise manner |
US7997534B2 (en) | 2006-10-13 | 2011-08-16 | Airbus Operations Gmbh | Connecting structure for an aircraft or spacecraft and method for producing the same |
WO2015004431A1 (en) * | 2013-07-12 | 2015-01-15 | The University Of Sheffield | Composites |
DE102006048641B4 (en) * | 2006-10-13 | 2015-04-16 | Airbus Operations Gmbh | Connection structure for an aircraft or spacecraft and method of manufacturing the same |
DE102015119351A1 (en) * | 2015-11-10 | 2017-05-11 | Proreta Tactical GmbH | Ballistic protective plate and protection device |
CN110216931A (en) * | 2019-05-31 | 2019-09-10 | 华南理工大学 | A kind of carbon fiber-reinforced resin mixing laminate and its forming method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1569307A1 (en) * | 1964-09-04 | 1970-03-26 | E I Du Pont Nemours & Company | Laminate |
DE1959635A1 (en) * | 1968-11-27 | 1970-06-11 | Gen Tire & Rubber Co | Laminate structure |
US3616177A (en) * | 1969-09-17 | 1971-10-26 | Du Pont | Laminar structures of polyimides and wire insulated therewith |
DE2345796A1 (en) * | 1972-09-11 | 1974-03-21 | Rhone Poulenc Sa | COMPOSITE PRODUCTS BASED ON HEAT RESISTANT RESIN |
DE1694010B2 (en) * | 1968-02-10 | 1975-04-17 | Walter Dr.Phil. 6233 Kelkheim Dannoehl | Reinforced plastic |
GB2043532A (en) * | 1979-01-26 | 1980-10-08 | Toho Beslon Co | Heat mouldable laminate and process of moulding same |
DE2943964A1 (en) * | 1979-10-31 | 1981-05-14 | Technochemie Gmbh, Verfahrenstechnik, 6901 Dossenheim | FIBER MATERIALS PRE-IMPREGNATED WITH DUROMER POLYIMIDE RESINS, AND METHOD FOR THE PRODUCTION THEREOF |
EP0075033A1 (en) * | 1981-09-18 | 1983-03-30 | Hexcel Corporation | Sheet material, process for its production and a composite structure |
-
1988
- 1988-10-26 DE DE3836442A patent/DE3836442A1/en not_active Ceased
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1569307A1 (en) * | 1964-09-04 | 1970-03-26 | E I Du Pont Nemours & Company | Laminate |
DE1694010B2 (en) * | 1968-02-10 | 1975-04-17 | Walter Dr.Phil. 6233 Kelkheim Dannoehl | Reinforced plastic |
DE1959635A1 (en) * | 1968-11-27 | 1970-06-11 | Gen Tire & Rubber Co | Laminate structure |
US3616177A (en) * | 1969-09-17 | 1971-10-26 | Du Pont | Laminar structures of polyimides and wire insulated therewith |
DE2345796A1 (en) * | 1972-09-11 | 1974-03-21 | Rhone Poulenc Sa | COMPOSITE PRODUCTS BASED ON HEAT RESISTANT RESIN |
GB2043532A (en) * | 1979-01-26 | 1980-10-08 | Toho Beslon Co | Heat mouldable laminate and process of moulding same |
DE2943964A1 (en) * | 1979-10-31 | 1981-05-14 | Technochemie Gmbh, Verfahrenstechnik, 6901 Dossenheim | FIBER MATERIALS PRE-IMPREGNATED WITH DUROMER POLYIMIDE RESINS, AND METHOD FOR THE PRODUCTION THEREOF |
EP0075033A1 (en) * | 1981-09-18 | 1983-03-30 | Hexcel Corporation | Sheet material, process for its production and a composite structure |
Non-Patent Citations (3)
Title |
---|
- DE-Buch: ELIAS, H.G.: Neue polymere Werkstoffe 1969-1974, CarlHanser Verlag, München, Wien 1975, S. 140 * |
- DE-Buch: Neue polymere Werkstoffe für die industrielle Anwendung, 2. Folge, Carl Hanser Verlag, München, Wien 1983, S. 286 * |
DE-Z: SAECHTLING, Hansjürgen: Kunststoffe für den Innenausbau. In: VDI, Bd. 94, Nr. 29, 11.10.1952, S. 962-968 * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4404604A1 (en) * | 1994-02-14 | 1995-08-17 | Hella Kg Hueck & Co | Plastics lighting reflectors esp. for motor vehicle headlamps |
EP0730951A1 (en) * | 1995-03-04 | 1996-09-11 | British Aerospace Public Limited Company | A composite laminate |
US5806796A (en) * | 1995-03-04 | 1998-09-15 | British Aerospace Public Limited Company | Composite laminate |
WO1998038031A2 (en) * | 1997-02-27 | 1998-09-03 | Advanced Composites Group Ltd. | Improvements in or relating to moulding methods and moulded articles |
WO1998038031A3 (en) * | 1997-02-27 | 1998-12-17 | Advanced Composites Group Ltd | Improvements in or relating to moulding methods and moulded articles |
DE102006048641B4 (en) * | 2006-10-13 | 2015-04-16 | Airbus Operations Gmbh | Connection structure for an aircraft or spacecraft and method of manufacturing the same |
US7997534B2 (en) | 2006-10-13 | 2011-08-16 | Airbus Operations Gmbh | Connecting structure for an aircraft or spacecraft and method for producing the same |
DE102009014973A1 (en) * | 2009-03-18 | 2010-09-23 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Shuttering element for land vehicles and air- or spacecrafts, comprises a self-supporting external wall having fiber-reinforced polymer materials, and an internal wall having thermoplastic reinforced with thermoplastic fiber |
DE102009014973B4 (en) * | 2009-03-18 | 2011-10-27 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | An element |
DE102009037171A1 (en) * | 2009-08-03 | 2011-02-10 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Wall element for land-, aircraft- and space vehicle, comprises molded part made of fiber-reinforced plastic material and having outer surface, where plastic film is disposed on outer surface with high tensile strength in area-wise manner |
WO2015004431A1 (en) * | 2013-07-12 | 2015-01-15 | The University Of Sheffield | Composites |
US10618262B2 (en) | 2013-07-12 | 2020-04-14 | The University Of Sheffield | Composites |
DE102015119351A1 (en) * | 2015-11-10 | 2017-05-11 | Proreta Tactical GmbH | Ballistic protective plate and protection device |
DE102015119351B4 (en) | 2015-11-10 | 2022-12-29 | Proreta Tactical GmbH | Ballistic protection device |
CN110216931A (en) * | 2019-05-31 | 2019-09-10 | 华南理工大学 | A kind of carbon fiber-reinforced resin mixing laminate and its forming method |
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8110 | Request for examination paragraph 44 | ||
8131 | Rejection |