JPH06155583A - Method for adhesion of fiber reinforced plastic member and method for detection of adhesion inferiority - Google Patents
Method for adhesion of fiber reinforced plastic member and method for detection of adhesion inferiorityInfo
- Publication number
- JPH06155583A JPH06155583A JP4336576A JP33657692A JPH06155583A JP H06155583 A JPH06155583 A JP H06155583A JP 4336576 A JP4336576 A JP 4336576A JP 33657692 A JP33657692 A JP 33657692A JP H06155583 A JPH06155583 A JP H06155583A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- magnetic
- adhesion
- adhesive layer
- reinforced plastic
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維強化プラスチック
部材を強固に接着する方法及びその接着部における接着
不良を検知する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for firmly adhering a fiber-reinforced plastic member and a method for detecting an adhesion failure at the adhering portion.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】繊維強
化プラスチック部材同士を接着剤によって接着する場
合、その接着部における強度を向上させるために、接着
面全体に一定の厚みを有し、かつ、欠落等の接着不良が
ない接着層を形成する必要がある。また、その接着層は
薄層であることが好ましい。2. Description of the Related Art In the case of adhering fiber-reinforced plastic members to each other with an adhesive, the entire adhering surface has a certain thickness in order to improve the strength of the adhering portion, and It is necessary to form an adhesive layer that does not have defective adhesion such as chipping. Further, the adhesive layer is preferably a thin layer.
【０００３】従来より、接着層を均一な薄層に形成する
ために、ガラスビーズ等のフィラー材を接着剤に混入す
る方法が採られていた。接着層の厚さはガラスビーズの
混入体積率により定量化されるため、これを接着剤に適
量混入することにより一定の厚みを有する薄層を形成す
ることができる。しかしながら、この方法を用いても接
着不良を防止することは困難である。Conventionally, in order to form the adhesive layer into a uniform thin layer, a method of mixing a filler material such as glass beads into the adhesive has been adopted. Since the thickness of the adhesive layer is quantified by the mixing volume ratio of the glass beads, it is possible to form a thin layer having a constant thickness by mixing this in an appropriate amount in the adhesive. However, even with this method, it is difficult to prevent defective adhesion.
【０００４】その接着不良の存在を検知するために、従
来から超音波探傷法等が用いられているが、超音波探傷
法では、その原理上曲面や表面が粗い面等への適用が困
難である。また、上記のようにガラスビーズ等のフィラ
ー材を混入した接着剤に対して超音波探傷法を用いる
と、超音波が発散してしまうため検知が難しい。In order to detect the existence of the defective adhesion, an ultrasonic flaw detection method or the like has been conventionally used, but it is difficult to apply the ultrasonic flaw detection method to a curved surface or a rough surface due to its principle. is there. Further, when the ultrasonic flaw detection method is used for an adhesive agent in which a filler material such as glass beads is mixed as described above, it is difficult to detect because ultrasonic waves diverge.
【０００５】従って本発明の目的は、上記問題点を解消
し、繊維強化プラスチック部材を強固に接着することの
できる接着方法及びその接着部における接着不良を簡便
に検知することができる接着不良検知方法を提供するこ
とである。Therefore, an object of the present invention is to solve the above problems and to bond a fiber-reinforced plastic member firmly, and a bonding failure detection method capable of simply detecting a bonding failure at the bonding portion. Is to provide.
【０００６】[0006]
【課題を解決するための手段】以上の目的に鑑み鋭意研
究の結果、本発明者等は、繊維強化プラスチック部材を
接着する際、接着層に応力−磁気特性を有する磁性体を
配設すれば、接着剤の硬化中に磁性体に高周波の交流磁
界を与えることにより、接着界面の濡れ性を向上させて
良好な接着層を形成し、繊維強化プラスチック部材を強
固に接着できることを発見した。また、本発明者等は、
接着剤に配設した磁性体の磁気特性の変化を測定するこ
とにより接着不良を検知できることを発見した。本発明
は上記発見に基づき完成したものである。As a result of earnest research in view of the above objects, the present inventors have found that when a fiber-reinforced plastic member is bonded, a magnetic body having stress-magnetic characteristics is provided in the bonding layer. It was discovered that by applying a high-frequency alternating magnetic field to the magnetic material during curing of the adhesive, the wettability of the adhesive interface is improved to form a good adhesive layer, and the fiber-reinforced plastic member can be firmly adhered. In addition, the present inventors,
It was discovered that the adhesion failure can be detected by measuring the change in the magnetic characteristics of the magnetic substance provided in the adhesive. The present invention has been completed based on the above findings.
【０００７】すなわち、接着剤を用いた接着層により繊
維強化プラスチック部材を接着する本発明の方法は、前
記接着層に応力−磁気特性を有する磁性体を配設するこ
とを特徴とする。That is, the method of the present invention for adhering a fiber reinforced plastic member with an adhesive layer using an adhesive is characterized in that a magnetic material having a stress-magnetic characteristic is disposed in the adhesive layer.
【０００８】また、本発明の繊維強化プラスチック部材
の接着不良検知方法は、応力−磁気特性を有する磁性体
を配設した接着層により繊維強化プラスチック部材を接
着し、前記磁性体の磁気特性の変化を測定することによ
り接着不良を検知することを特徴とする。Further, in the method of detecting the adhesion failure of the fiber-reinforced plastic member of the present invention, the fiber-reinforced plastic member is adhered by an adhesive layer in which a magnetic material having a stress-magnetic characteristic is arranged, and the magnetic characteristic of the magnetic material is changed. It is characterized in that the adhesion failure is detected by measuring.
【０００９】[0009]
【実施例及び作用】以下、本発明を詳細に説明する。な
お、繊維強化プラスチックを以下ＦＲＰという。The present invention will be described in detail below. The fiber reinforced plastic is hereinafter referred to as FRP.
【００１０】一般に、接着剤を使用してＦＲＰ部材を接
着する場合、接着強度を高めるため、接着層を均一に、
かつ20μｍ程度の薄層となるように形成する必要があ
る。接着層を均一な薄層にするために、直径が10〜20μ
ｍ程度のガラスビーズ等のフィラーを接着剤に混入する
場合もある。なお、本明細書において「均一」とは、接
着剤が接着面全体にわたって一定の厚みを有し、接着面
に接着剤の欠落がないことを言う。Generally, when an FRP member is adhered using an adhesive, the adhesive layer is evenly formed in order to increase the adhesive strength.
In addition, it is necessary to form a thin layer of about 20 μm. The diameter is 10-20μ to make the adhesive layer a uniform thin layer.
In some cases, a filler such as glass beads of about m is mixed in the adhesive. In the present specification, “uniform” means that the adhesive has a constant thickness over the entire adhesive surface and there is no lack of adhesive on the adhesive surface.
【００１１】しかし、接着時圧力のバラツキや空気の混
入等により接着層を均一な薄層に形成できない場合があ
る。また、上記のようにフィラーを混入した場合におい
ても、接着層を均一に形成することができない場合があ
る。However, there are cases in which the adhesive layer cannot be formed into a uniform thin layer due to variations in pressure during adhering and the inclusion of air. Further, even if the filler is mixed as described above, the adhesive layer may not be formed uniformly.
【００１２】そこで、接着剤とＦＲＰ部材との濡れ性を
より向上させるために、本発明では、接着剤が形成する
接着層に応力−磁気特性を有する磁性体を配設し、接着
剤の硬化中に磁性体に高周波の交流磁界を与える。交流
磁界を与えられた磁性体は磁歪振動を起こすため、接着
剤とＦＲＰ部材との濡れ性が向上する。Therefore, in order to further improve the wettability between the adhesive and the FRP member, in the present invention, a magnetic material having a stress-magnetic characteristic is disposed in the adhesive layer formed by the adhesive, and the adhesive is cured. A high-frequency alternating magnetic field is applied to the magnetic body. Since the magnetic body to which the alternating magnetic field is applied causes magnetostrictive vibration, the wettability between the adhesive and the FRP member is improved.
【００１３】本発明において、接着剤に配設する磁性体
は、後述する接着不良の検知を考慮して応力により磁気
特性（透磁率）が大きく変化する特性（以下応力−磁気
特性という）を有するFe系アモルファス合金やFe−希土
類系の超磁歪材等を使用する。Fe系アモルファス合金と
しては、 Fe − Si −Ｂ系のアモルファス合金が好まし
く、特にCrを１〜３原子％含有するアモルファス合金が
好ましい。このようにCr元素を含有したアモルファス合
金は耐食性にも優れている。この耐食性の向上は、膨潤
する可能性のある接着剤を使用した場合に接着層の延命
化を図る上で好ましい。In the present invention, the magnetic substance provided in the adhesive has a characteristic (hereinafter referred to as stress-magnetic characteristic) in which the magnetic characteristic (permeability) changes greatly due to stress in consideration of detection of adhesion failure described later. An Fe-based amorphous alloy or a Fe-rare earth-based giant magnetostrictive material is used. As the Fe-based amorphous alloy, an Fe-Si-B-based amorphous alloy is preferable, and an amorphous alloy containing 1 to 3 atomic% of Cr is particularly preferable. As described above, the amorphous alloy containing Cr element has excellent corrosion resistance. This improvement in corrosion resistance is preferable in order to prolong the life of the adhesive layer when an adhesive that may swell is used.
【００１４】上記の応力−磁気特性を有する磁性体は、
長繊維状、短繊維状、リボン状、フレーク状、粒状、又
は粉末状の磁歪材料からなるものを使用すればよいが、
検知感度及び接着層における補強効果を高める目的で長
繊維（ワイヤー）状の磁歪材料を使用するのが好まし
い。The magnetic substance having the above stress-magnetic characteristics is
Long-fiber, short-fiber, ribbon-shaped, flake-shaped, granular, or powdered magnetostrictive material may be used.
It is preferable to use a long-fiber (wire) magnetostrictive material for the purpose of enhancing the detection sensitivity and the reinforcing effect in the adhesive layer.
【００１５】上記磁性体の接着剤に対する配設比は、体
積比（以下V/f という) で0.5 〜50％、特に１〜10％と
するのが好ましい。V/f が0.5 ％未満では、透磁率の変
化を測定するのが困難となり、一方、V/f が50％を超え
ると、接着が困難となり、強度が低下する。The volume ratio (hereinafter referred to as V / f) of the magnetic material to the adhesive is preferably 0.5 to 50%, and more preferably 1 to 10%. When V / f is less than 0.5%, it is difficult to measure the change in magnetic permeability, while when V / f is more than 50%, the adhesion becomes difficult and the strength decreases.
【００１６】一方、ＦＲＰ部材を接着するには、液状の
接着剤を接着面に塗布する方法や、半ねり状の接着剤を
接着面間に挟む方法等、種々の方法を用いることができ
るが、接着工程の簡便化を図った場合、接着シートを使
用する方法を用いるのが好ましい。On the other hand, in order to bond the FRP member, various methods such as a method of applying a liquid adhesive to the adhesive surface and a method of sandwiching a semi-bent adhesive between the adhesive surfaces can be used. When the adhesion process is simplified, it is preferable to use a method using an adhesive sheet.
【００１７】以下、応力−磁気特性を有する磁性体とし
てアモルファスワイヤーを例にとり、また、接着方法と
して接着シートを使用する方法を例にとって本発明を説
明する。The present invention will be described below by taking an amorphous wire as an example of a magnetic material having a stress-magnetic characteristic and using an adhesive sheet as an adhesive method.
【００１８】アモルファスワイヤーを用いる場合、ワイ
ヤーの直径を10〜 200μｍ、特に100 〜150 μｍとする
のが好ましい。ワイヤーの直径を10μｍ未満にするのは
作製上困難であり、また 200μｍを超えるものにする
と、アモルファス化が困難となる。When an amorphous wire is used, the diameter of the wire is preferably 10 to 200 μm, particularly 100 to 150 μm. If the wire diameter is less than 10 μm, it is difficult to manufacture, and if it exceeds 200 μm, it becomes difficult to make it amorphous.
【００１９】最初に、アモルファスワイヤーを一方向へ
並べるか、あるいは織布状にする。アモルファスワイヤ
ー間のピッチは300 μｍ程度にするのが好ましい。次
に、上記アモルファスワイヤーに接着剤を含浸させる。
本発明において使用する接着剤は、フェノール樹脂、シ
アン系樹脂及びポリイミド系樹脂等が挙げられるが、接
着シートとして使用するには、熱硬化性エポキシ樹脂や
熱可塑性エポキシ樹脂等を使用するのが好ましい。接着
剤を十分に含浸させた後、乾燥させ、接着シートとす
る。そのとき、接着シートは0.15〜0.2 mmの厚さに形成
するのが好ましい。First, the amorphous wires are arranged in one direction or woven. The pitch between the amorphous wires is preferably about 300 μm. Next, the amorphous wire is impregnated with an adhesive.
Examples of the adhesive used in the present invention include a phenol resin, a cyan resin, and a polyimide resin. When used as an adhesive sheet, it is preferable to use a thermosetting epoxy resin or a thermoplastic epoxy resin. . After sufficiently impregnating the adhesive, it is dried to obtain an adhesive sheet. At that time, the adhesive sheet is preferably formed to a thickness of 0.15 to 0.2 mm.
【００２０】ＦＲＰ部材を接着するには、まず、ＦＲＰ
部材の接着面間に接着シートを設置する。アモルファス
ワイヤーの繊維軸の配向性については、強度の観点から
ＦＲＰ部材中の強化繊維の方向と同じ方向にするのが好
ましい。To bond the FRP member, first, the FRP
An adhesive sheet is placed between the adhesive surfaces of the members. The orientation of the fiber axis of the amorphous wire is preferably the same as the direction of the reinforcing fiber in the FRP member from the viewpoint of strength.
【００２１】次に、ＦＲＰ部材の接着面に垂直の方向に
圧力を加えながら電気オーブン等により加熱する。圧力
を加えることにより、接着層をほぼアモルファスワイヤ
ーの直径程度の薄層にすることができる。圧力の大きさ
は、４〜６kg/cm 2 とするのが好ましい。Next, the FRP member is heated in an electric oven or the like while applying pressure in a direction perpendicular to the bonding surface. By applying pressure, the adhesive layer can be made as thin as about the diameter of the amorphous wire. The magnitude of pressure is preferably 4 to 6 kg / cm 2 .
【００２２】本発明では、接着層とＦＲＰ部材との接着
強度を向上させるため、接着シートの硬化中に、接着シ
ートに配設したアモルファスワイヤーに高周波の交流磁
界を与える。具体的には後述する磁気センサーを用いれ
ばよく、周波数は0.5 〜50kHz とし、好ましくは、１〜
２kHz とする。交流磁界を与えられたアモルファスワイ
ヤーは磁歪振動を起こし、接着剤とＦＲＰ部材との濡れ
性を向上させ、接着不良の発生を低下させることができ
る。In the present invention, in order to improve the adhesive strength between the adhesive layer and the FRP member, a high frequency AC magnetic field is applied to the amorphous wire arranged on the adhesive sheet during curing of the adhesive sheet. Specifically, the magnetic sensor described later may be used, and the frequency is 0.5 to 50 kHz, preferably 1 to
Set to 2kHz. The amorphous wire to which the alternating magnetic field is applied causes magnetostrictive vibration, improves the wettability between the adhesive and the FRP member, and can reduce the occurrence of defective adhesion.
【００２３】接着剤の硬化後、アモルファスワイヤーは
接着層の補強材にもなり、ＦＲＰ部材の接着部分におけ
る強度を高めることができる。After the adhesive is hardened, the amorphous wire also serves as a reinforcing material for the adhesive layer, and the strength of the adhesive portion of the FRP member can be increased.
【００２４】以上、アモルファスワイヤー及び接着シー
トを例にとって説明したが、磁性体にフレーク状、粒
状、又は粉末状等の磁歪材料を使用し、接着剤に液体状
又は半練り状等のものを使用した場合、あらかじめ接着
剤に磁歪材料を混入したものを接着面に塗布して接着す
る方法も考えられる。Although the amorphous wire and the adhesive sheet have been described above as examples, a magnetostrictive material such as flakes, granules or powders is used as the magnetic material, and liquid or semi-kneaded material is used as the adhesive. In such a case, a method of applying a mixture of an adhesive and a magnetostrictive material in advance to the adhesive surface and adhering the adhesive may be considered.
【００２５】以下、上記方法によって接着したＦＲＰ部
材に発生した接着不良を検知する本発明の方法を詳述す
る。The method of the present invention for detecting the adhesion failure occurring in the FRP member bonded by the above method will be described in detail below.
【００２６】接着剤に配設されたアモルファスワイヤー
には、接着剤の硬化及び収縮により、周囲から数kg/mm
2 程度の応力がかかる。しかし、接着剤の欠落等の接着
不良が発生した場合、その部位におけるアモルファスワ
イヤーにかかる応力は正常部位に比べて小さい。そこ
で、応力−磁気特性を有するアモルファスワイヤーの磁
気特性（透磁率）の変化を測定すれば、接着不良を検知
することができる。The amorphous wire provided on the adhesive may be several kg / mm from the surrounding due to the hardening and shrinkage of the adhesive.
A stress of about 2 is applied. However, when adhesion failure such as lack of adhesive occurs, the stress applied to the amorphous wire at that portion is smaller than that at a normal portion. Therefore, if the change in the magnetic characteristic (magnetic permeability) of the amorphous wire having the stress-magnetic characteristic is measured, the adhesion failure can be detected.
【００２７】アモルファスワイヤーの透磁率の変化の検
知は、磁気センサーを用いて行うことができる。磁気セ
ンサーは、アモルファスワイヤーの透磁率の変化を電圧
やインダクタンス、あるいは共振振動の変化等を測定す
ることにより検知できるものであれば、いかなる構成の
ものでもよい。The change in magnetic permeability of the amorphous wire can be detected by using a magnetic sensor. The magnetic sensor may have any structure as long as it can detect a change in magnetic permeability of the amorphous wire by measuring a change in voltage, inductance, resonance vibration, or the like.
【００２８】本発明に使用できる磁気センサーの一例を
図１に示す。磁気センサーは、カバー部材６a 、６b 内
にＵ字形の第１及び第２のフェライトコア３a 、３b が
それぞれ固定されている。第１フェライトコア３a に第
１励磁コイル４a 及び第１検知コイル５a が別々に巻装
され、また第２フェライトコア３b に第２励磁コイル４
b 及び第２検知コイル５b が別々に巻装されている。第
１、第２励磁コイル４a 、４b は高周波電流用電源７に
接続され、また第１、第２検知コイル５a 、５b は検知
器８に接続されている。An example of a magnetic sensor that can be used in the present invention is shown in FIG. In the magnetic sensor, U-shaped first and second ferrite cores 3a and 3b are fixed in cover members 6a and 6b, respectively. The first exciting coil 4a and the first detecting coil 5a are separately wound around the first ferrite core 3a, and the second exciting coil 4 is wound around the second ferrite core 3b.
b and the second detection coil 5b are separately wound. The first and second exciting coils 4a and 4b are connected to a high frequency current power source 7, and the first and second detecting coils 5a and 5b are connected to a detector 8.
【００２９】測定を行うには、まず、接着層１a をはさ
んでいるＦＲＰ部材１の両表層にセンシングコイル２を
接触させるか、あるいは非接触の状態で設置する。第
１、第２励磁コイル４a 、４b に高周波電流用電源７か
ら高周波電流を供給すると、点線Ａで示される磁力線が
接着層を貫通して閉磁路を形成する。これにより、誘起
された起電力を第２検知コイル５a 、５b で検知し、こ
れを相互インダクタンス（以下インダクタンスという）
として検知器８で測定する。In order to carry out the measurement, first, the sensing coil 2 is brought into contact with both surface layers of the FRP member 1 sandwiching the adhesive layer 1a, or is placed in a non-contact state. When a high-frequency current is supplied to the first and second exciting coils 4a and 4b from the high-frequency current power source 7, the magnetic force lines indicated by the dotted line A penetrate the adhesive layer to form a closed magnetic circuit. As a result, the induced electromotive force is detected by the second detection coils 5a and 5b, and the mutual inductance (hereinafter referred to as inductance) is detected.
Is measured by the detector 8.
【００３０】前記インダクタンスは接着層内に配設され
たアモルファスワイヤーの透磁率の大小、つまり発生し
ている応力の大小によって変化する。このため、インダ
クタンスの変化を測定することにより、間接的に接着不
良を検知することができる。The inductance changes depending on the magnetic permeability of the amorphous wire arranged in the adhesive layer, that is, the generated stress. Therefore, it is possible to indirectly detect the adhesion failure by measuring the change in the inductance.
【００３１】検知感度の点では、後述するピックアップ
型センサーより図１に示すような閉路式のセンサーを用
いて測定するのが好ましい。In terms of detection sensitivity, it is preferable to use a closed-loop type sensor as shown in FIG. 1 for measurement rather than a pickup type sensor described later.
【００３２】別の磁気センサーとして、例えば図２に示
すような市販のピックアップ型センサーを用いることが
できる。このピックアップ型センサーは、平面状の励磁
コイル（図示せず）と平面状の検知コイル（図示せず）
とからなるセンシングコイル９とリード線10を有する。As another magnetic sensor, for example, a commercially available pickup type sensor as shown in FIG. 2 can be used. This pickup type sensor has a flat excitation coil (not shown) and a flat detection coil (not shown).
And a sensing coil 9 and a lead wire 10.
【００３３】このセンシングコイル９をＦＲＰ部材にお
ける接着部位の表層に接触させてあるいは非接触の状態
で設置し、センシングコイル９に高周波電流を供給する
と、点線Ｂの磁力線に示すような磁界が接着層を通過す
るように形成されるので、上記の閉路式の磁気センサー
の場合と同様にインダクタンスの変化を測定する。この
ピックアップ型センサーを用いると、複雑な形状の接着
部位における接着不良の検知も可能である。When this sensing coil 9 is installed in contact with or not in contact with the surface layer of the bonding portion of the FRP member, and a high-frequency current is supplied to the sensing coil 9, a magnetic field as shown by the magnetic line of dotted line B is generated. Since it is formed so as to pass through, the change in the inductance is measured as in the case of the above-mentioned closed loop magnetic sensor. By using this pickup type sensor, it is possible to detect the adhesion failure in the adhesion part having a complicated shape.
【００３４】さらに別の磁気センサーとしては、図３に
示すように、ＦＲＰ部材における接着部分の全周に巻装
したセンシングコイル11を有するセンサーを用いてもよ
い。この磁気センサーは、励磁コイル（図示せず）と検
知コイル（図示せず）とからなるセンシングコイル11と
リード線12を有し、センシングコイル11はＦＲＰ部材の
全周に接触させて設置してもよいし、非接触の状態にし
て設置してもよい。As another magnetic sensor, as shown in FIG. 3, a sensor having a sensing coil 11 wound around the entire periphery of the bonded portion of the FRP member may be used. This magnetic sensor has a sensing coil 11 composed of an excitation coil (not shown) and a detection coil (not shown), and a lead wire 12. The sensing coil 11 is installed in contact with the entire circumference of the FRP member. It may be installed in a non-contact state.
【００３５】励磁コイルに高周波電流を供給すると、点
線Ｃの磁力線に示すような磁界がＦＲＰ部材を通過する
ように形成されるので、上記の２種の磁気センサーの場
合と同様にインダクタンスの変化を測定する。When a high-frequency current is supplied to the exciting coil, a magnetic field as shown by the magnetic force line of the dotted line C is formed so as to pass through the FRP member, so that the inductance changes as in the case of the above two types of magnetic sensors. taking measurement.
【００３６】以下、本発明を具体的実施例に基づき詳細
に説明する。実施例１ Fe−Si−Ｂ系アモルファス合金製のワイヤー（直径20μ
ｍ）を平行に0.3 mmピッチで配置したものに熱硬化性エ
ポキシ樹脂を含浸させ、0.2 mm厚の接着シートを作製し
た。そのとき、アモルファスワイヤーのエポキシ樹脂に
対するV/f は22％であった。The present invention will be described in detail below based on concrete examples. Example 1 Wire made of Fe-Si-B system amorphous alloy (diameter 20 μ
m) was arranged in parallel at a pitch of 0.3 mm, and a thermosetting epoxy resin was impregnated into the adhesive sheet having a thickness of 0.2 mm. At that time, the V / f of the amorphous wire with respect to the epoxy resin was 22%.
【００３７】次に、接着シート内に厚さ40μｍ、面積40
0 mm2 のテフロンシートをモールドした後、マトリック
スがエポキシ樹脂からなり、強化繊維がカーボン繊維か
らなる２枚のＦＲＰ部材（150 mm×100 mm×２mm）によ
って接着シートを挟み、５kg/cm 2 の圧力を接着面に対
して垂直に加え、120 ℃で加熱して接着シートを硬化さ
せた。このようにして、人工的に接着不良を発生させた
試験片を得た。Next, the adhesive sheet has a thickness of 40 μm and an area of 40.
0 After molding the Teflon sheet of mm 2, the matrix is an epoxy resin, sandwiching the adhesive sheet by two FRP members reinforcing fiber made of carbon fiber (150 mm × 100 mm × 2mm ), the 5 kg / cm 2 Pressure was applied perpendicularly to the adhesive surface and heating was performed at 120 ° C. to cure the adhesive sheet. In this way, a test piece in which adhesion failure was artificially generated was obtained.
【００３８】得られた試験片の接着不良検知を行うため
に、図２に示すような磁気センサーを使用し、励磁コイ
ルを以下の励磁条件で励磁させるとともに、センシング
コイル９を試験片の表面を移動させた。各部位における
アモルファスワイヤーの透磁率の変化を、検出コイルに
発生する出力電圧としてデジタルボルトメータを用いて
測定した。測定の結果を図４に示す出力電圧マップとし
て表す。In order to detect the adhesion failure of the obtained test piece, a magnetic sensor as shown in FIG. 2 is used, the exciting coil is excited under the following exciting conditions, and the sensing coil 9 is applied to the surface of the test piece. I moved it. The change in magnetic permeability of the amorphous wire at each site was measured using a digital voltmeter as the output voltage generated in the detection coil. The result of the measurement is shown as an output voltage map shown in FIG.
【００３９】励磁条件 励磁コイル ：200 ターン（100 ターン／mm） 検出コイル ：200 ターン（100 ターン／mm） 周波数 ：１kHz 波形 ：正弦波 励磁電圧 ：15ＶP-P Excitation conditions Excitation coil: 200 turns (100 turns / mm) Detection coil: 200 turns (100 turns / mm) Frequency: 1kHz Waveform: Sine wave Excitation voltage: 15V PP
【００４０】図４から明らかなように、接着層に磁性体
を配設することにより、接着不良の検知を容易に行うこ
とができる。As is apparent from FIG. 4, by arranging the magnetic material in the adhesive layer, it is possible to easily detect the adhesive failure.
【００４１】実施例２ 実施例１で得た試験片を用いて、界面セン断強度を測定
した。測定結果は17.05MPaであった。 Example 2 Using the test piece obtained in Example 1, the interfacial shear strength was measured. The measurement result was 17.05 MPa.
【００４２】比較例１ 熱硬化性エポキシ樹脂にガラスフィラーを混入し、0.2
mm厚の接着シートを作製した。その接着シートと、実施
例１と同じＦＲＰ部材とを用いて実施例１と同様にして
試験片を作製し、試験片の界面セン断強度を測定した。
測定結果は16.67MPaであった。 Comparative Example 1 A thermosetting epoxy resin was mixed with a glass filler to give 0.2
An mm-thick adhesive sheet was prepared. A test piece was prepared in the same manner as in Example 1 using the adhesive sheet and the same FRP member as in Example 1, and the interfacial shear strength of the test piece was measured.
The measurement result was 16.67 MPa.
【００４３】実施例２及び比較例１から明らかなよう
に、接着層にアモルファスワイヤーを配設して接着した
ＦＲＰ部材は、接着層にガラスフィラーを混入して接着
したＦＲＰ部材よりも接着強度が高い。As is clear from Example 2 and Comparative Example 1, the FRP member in which the amorphous wire is arranged and bonded in the adhesive layer has a bonding strength higher than that of the FRP member in which the glass filler is mixed and bonded in the adhesive layer. high.
【００４４】[0044]
【発明の効果】以上詳述したように、本発明の方法によ
れば、接着層に応力−磁気特性を有する磁性体を配設し
ているので、磁性体に高周波の交流磁界を与え、接着界
面の濡れ性を向上させることにより接着不良の発生を低
下させることができる。また、磁性体は接着層の補強材
になるとともに、接着層を一定の厚みを有する薄層に形
成することができるため、接着強度を高めることができ
る。As described above in detail, according to the method of the present invention, since the magnetic material having the stress-magnetic characteristics is arranged in the adhesive layer, a high frequency AC magnetic field is applied to the magnetic material to bond the magnetic material. By improving the wettability of the interface, the occurrence of defective adhesion can be reduced. Further, since the magnetic body serves as a reinforcing material for the adhesive layer and the adhesive layer can be formed as a thin layer having a constant thickness, the adhesive strength can be increased.
【００４５】また、本発明の方法によれば、接着層に配
設した磁性体の磁気特性の変化を測定することにより、
接着不良を検知できる。さらに、磁気特性の測定はＦＲ
Ｐ部材に非接触で行うことができるので、複雑な形状に
おける接着部位に適用することができる。Further, according to the method of the present invention, by measuring the change in the magnetic characteristics of the magnetic material provided in the adhesive layer,
Adhesion failure can be detected. Furthermore, the measurement of magnetic properties is FR
Since it can be performed without contacting the P member, it can be applied to an adhesion site in a complicated shape.
【図１】本発明の一実施例による接着不良検知方法を示
す概略図である。FIG. 1 is a schematic diagram showing a method of detecting a defective adhesion according to an embodiment of the present invention.
【図２】本発明の他の実施例による接着不良検知方法を
示す概略図である。FIG. 2 is a schematic view showing a method of detecting an adhesion failure according to another embodiment of the present invention.
【図３】本発明の他の実施例による接着不良検知方法を
示す概略図である。FIG. 3 is a schematic view showing a method of detecting an adhesion failure according to another embodiment of the present invention.
【図４】ＦＲＰ試験片の各部位をスキャニングして測定
した出力電圧をグラフにした出力電圧マップである。FIG. 4 is an output voltage map showing a graph of the output voltage measured by scanning each part of the FRP test piece.
【符号の説明】 １・・・ＦＲＰ部材 １a ・・・接着層 ２、９、11・・・センシングコイル ３a 、３b ・・・フェライトコア ４a 、４b ・・・励磁コイル ５a 、５b ・・・検出コイル ６a 、６b ・・・カバー部材 ７・・・高周波電流用電源 ８・・・検出計 10、12・・・リード線 Ａ、Ｂ、Ｃ・・・磁力線[Explanation of Codes] 1 ... FRP member 1a ... Adhesive layer 2, 9, 11 ... Sensing coil 3a, 3b ... Ferrite core 4a, 4b ... Excitation coil 5a, 5b ... Detection Coil 6a, 6b ... Cover member 7 ... High frequency power supply 8 ... Detector 10, 12 ... Lead wire A, B, C ... Magnetic field line
Claims (3)
ラスチック部材を接着する方法において、前記接着層に
応力−磁気特性を有する磁性体を配設することを特徴と
する接着方法。1. A method for adhering a fiber reinforced plastic member by means of an adhesive layer using an adhesive, wherein a magnetic material having a stress-magnetic characteristic is disposed on the adhesive layer.
記接着剤の硬化中に前記磁性体に高周波の交流磁界を与
え、接着界面の濡れ性を向上させることにより良好な接
着層を形成し、前記繊維強化プラスチック部材を強固に
接着することを特徴とする接着方法。2. The adhesive method according to claim 1, wherein a high-frequency alternating magnetic field is applied to the magnetic material during curing of the adhesive to improve wettability of an adhesive interface, thereby forming a good adhesive layer. A bonding method, wherein the fiber-reinforced plastic member is firmly bonded.
た接着層により繊維強化プラスチック部材を接着し、前
記磁性体の磁気特性の変化を測定することにより接着不
良を検知することを特徴とする接着不良検知方法。3. A fiber-reinforced plastic member is adhered by an adhesive layer on which a magnetic material having stress-magnetic characteristics is arranged, and a change in magnetic characteristics of the magnetic material is measured to detect an adhesion failure. Adhesion failure detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33657692A JP3313165B2 (en) | 1992-11-24 | 1992-11-24 | Method of bonding fiber-reinforced plastic member and method of detecting defective bonding of fiber-reinforced plastic member containing adhesive layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33657692A JP3313165B2 (en) | 1992-11-24 | 1992-11-24 | Method of bonding fiber-reinforced plastic member and method of detecting defective bonding of fiber-reinforced plastic member containing adhesive layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06155583A true JPH06155583A (en) | 1994-06-03 |
| JP3313165B2 JP3313165B2 (en) | 2002-08-12 |
Family
ID=18300578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33657692A Expired - Fee Related JP3313165B2 (en) | 1992-11-24 | 1992-11-24 | Method of bonding fiber-reinforced plastic member and method of detecting defective bonding of fiber-reinforced plastic member containing adhesive layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3313165B2 (en) |
Cited By (6)
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|---|---|---|---|---|
| EP0666470A2 (en) * | 1994-01-26 | 1995-08-09 | Honda Giken Kogyo Kabushiki Kaisha | Stress measurement of magnetic materials, and FRP and adhesive members with such material for defect detection |
| JP2005030850A (en) * | 2003-07-10 | 2005-02-03 | Chi Mei Electronics Corp | Noncontact method and apparatus for inspecting electrical connection part |
| EP2070688A2 (en) | 2007-12-13 | 2009-06-17 | The Boeing Company | Aircraft structures bonded with adhesive including magnetostrictive material |
| JP2011527756A (en) * | 2008-07-09 | 2011-11-04 | ザ・ボーイング・カンパニー | Measurement of strain in bonded joints containing magnetostrictive materials. |
| US9042516B2 (en) | 2012-10-09 | 2015-05-26 | The Boeing Company | Nondestructive examination of structures having embedded particles |
| CN105527338A (en) * | 2015-10-26 | 2016-04-27 | 华南理工大学 | Metal wire rope on-line monitoring method and device |
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| JP2011527756A (en) * | 2008-07-09 | 2011-11-04 | ザ・ボーイング・カンパニー | Measurement of strain in bonded joints containing magnetostrictive materials. |
| EP2310187B1 (en) * | 2008-07-09 | 2016-12-21 | The Boeing Company | Measurement of strain in an adhesively bonded joint including magnetostrictive material |
| US9042516B2 (en) | 2012-10-09 | 2015-05-26 | The Boeing Company | Nondestructive examination of structures having embedded particles |
| CN105527338A (en) * | 2015-10-26 | 2016-04-27 | 华南理工大学 | Metal wire rope on-line monitoring method and device |
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|---|---|
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