JP2012162147A - 複合材構造体、これを備えた航空機主翼および航空機胴体 - Google Patents
複合材構造体、これを備えた航空機主翼および航空機胴体 Download PDFInfo
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- JP2012162147A JP2012162147A JP2011023154A JP2011023154A JP2012162147A JP 2012162147 A JP2012162147 A JP 2012162147A JP 2011023154 A JP2011023154 A JP 2011023154A JP 2011023154 A JP2011023154 A JP 2011023154A JP 2012162147 A JP2012162147 A JP 2012162147A
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- main wing
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Abstract
【解決手段】主翼1は、ボックス構造とされており、その下面外板3は、一方向に延在するとともにアクセスホール5が形成された金属製とされた中央部3bと、一方向に延在するとともに中央部3bの両側部に接続された繊維強化プラスチック製の前方部3aおよび後方部3cとを備えている。中央部3bに用いられる金属としては、チタン合金やアルミ合金が好適に用いられる。
【選択図】図1
Description
しかし、図6のような構造は、上記特許文献1のようなピンやスティッチを施す工程を不要とするものの、アクセスホール102の補強のみの観点からするとテーパ部分104bは本来不要であり、重量増の原因となっている。
すなわち、本発明にかかる複合材構造体は、一方向に延在するとともに孔が形成された金属製とされた孔付き構造部材と、前記一方向に延在するとともに前記孔付き構造部材の側部に接続された繊維強化プラスチック製の複合材とされた隣接構造部材とを備えていることを特徴とする。
なお、孔付き構造部材に用いる金属としては、例えば、チタン合金やアルミ合金が挙げられる。
図1(a)には、航空機の主翼1の下面外板3が示されている。下面外板3は、繊維強化プラスチック(FRP:Fiber Reinforced Plastics)製の複合材構造体と、金属製構造体とで形成されている。同図に示した破線は、フラップやスラット等を含む主翼1の外形線を示している。
また、ボックス構造とされた主翼1の内部には、その内部空間を長手方向において複数に分割するようにリブ28が設けられている。リブ28は、主翼1の幅方向(長手方向に直交する方向)にわたって延在した板状とされており、長手方向に所定間隔を有して複数配置されている。図3に示すように、各リブ28の前後の端部は、それぞれ、フロントスパー20及びリアスパー22に対してボルト・ナット等の所定のファスナ30によって固定されている。
中央部3bは、図1(b)に示されているように、前方部3a及び後方部3cに隣接する定厚領域3b−1は前方部3a及び後方部3cとほぼ同じ厚さとされており、この定厚領域3b−1は、アクセスホール5の周縁部に設けられた周縁領域3b−2を取り囲むように設けられている。周縁領域3b−2は、定厚領域3b−1よりも増厚されている。この増厚された周縁領域3b−2が、アクセスホール5の周縁部に生じる応力集中に対する補強となっている。また、周縁領域3b−2と隣接領域3b−1とは、フィレットR処理部3b−3によって接続されている。つまり、中央部3bは金属製とされているので、強化繊維プラスチックを用いた場合(図6(b)参照)のようにテーパ部分104bを設けずに、フィレットR処理部3b−3によって周縁領域3b−2と隣接領域3b−1とを接続することができる。したがって、図1(b)に比較としてテーパ部分104bを示したように、テーパ部分104bを設けた場合に比べて余肉を省略することができ、軽量化を図ることができる。
また、図4(b)に示すように、ストリンガ26と前方部3a(又は後方部3c)との間の接着部42にて接着させ、ストリンガ26と中央部3bとをファスナ40によって固定する方法としてもよい。なお、図4(b)に示した方法と逆の方法、すなわち、ストリンガ26と前方部3a(又は後方部3c)とをファスナ40によって固定し、ストリンガ26と中央部3bとの間を接着部42にて接着させてもよい。ストリンガ26と前方部3a(又は後方部3c)の結合は前記接着のみの結合としてもよいが、接着強度又は接着強度の信頼性が十分でない場合はファスナ40を併用してもよい。
また、図4(c)に示すように、ストリンガ26と前方部3a(又は後方部3c)との間、及び、ストリンガ26と中央部3bとの間に接着部42を介在させて接着させた後に、ファスナ40によって固定する方法としてもよい。
また、図4(d)に示すように、ファスナを用いずに接着部42における接着のみによって固定する方法としてもよい。
飛行時、主翼1には、その先端が上向きに変位するように荷重が加わる。したがって、主翼1の下面外板3には、その延在方向(0°方向)に引張り荷重が加わる。0°方向の引張り荷重は、中央部3bに形成されたアクセスホール5の周縁部に応力集中を発生させる。本実施形態では、中央部3bを金属製としたので、繊維強化プラスチック製の複合材とした場合のように剥離防止のためのテーパ部104b(図6(b)参照)を孔周縁部に設ける必要がない。したがって、テーパ部を形成するための余肉を省略することができるので、軽量化された中央部3bを実現することができる。
例えば、下面外板3とともにトルクボックスを構成する上面外板に、下面外板3と同様の構成を適用しても良い。
また、上記実施形態では、主として炭素繊維強化プラスチック(CFRP)を主として用いることとしたが、本発明はこれに限定されず、例えばガラス繊維強化プラスチック(GFRP:Glass Fiber Reinforced Plastic)やアラミド繊維強化プラスチック(AFRP:Aramid Fiber Reinforced Plastic)を用いても良い。
3 下面外板(複合材構造体)
3a 前方部(隣接構造部材)
3b 中央部(孔付き構造部材)
3c 後方部(隣接構造部材)
5 アクセスホール(孔)
Claims (5)
- 一方向に延在するとともに孔が形成された金属製とされた孔付き構造部材と、
前記一方向に延在するとともに前記孔付き構造部材の側部に接続された繊維強化プラスチック製の複合材とされた隣接構造部材と、
を備えていることを特徴とする複合材構造体。 - 航空機の主翼の下面外板が、該主翼の長手方向に延在する複数の部材で構成され、
これら部材のうち、前記下面外板に形成された前記孔としてアクセスホールを有する部材が前記孔付き構造部材とされ、他の部材が前記隣接構造部材とされていることを特徴とする請求項1に記載の複合材構造体。 - 航空機の胴体の外板が、該胴体の長手方向に延在する複数の部材で構成され、
これら部材のうち、前記外板に形成された前記孔として窓用孔を有する部材が前記孔付き構造部材とされ、他の部材が前記隣接構造部材とされていることを特徴とする請求項1に記載の複合材構造体。 - 請求項2に記載の複合材構造体を備えていることを特徴とする航空機主翼。
- 請求項3に記載の複合材構造体を備えていることを特徴とする航空機胴体。
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CN201280003462.8A CN103180207B (zh) | 2011-02-04 | 2012-01-26 | 复合材料构造体、具备该复合材料构造体的航空器主翼及航空器机身 |
US13/881,590 US9751608B2 (en) | 2011-02-04 | 2012-01-26 | Composite material structure, and aircraft wing and aircraft fuselage provided therewith |
PCT/JP2012/051699 WO2012105415A1 (ja) | 2011-02-04 | 2012-01-26 | 複合材構造体、これを備えた航空機主翼および航空機胴体 |
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