JP2017119422A - Structure member - Google Patents
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- JP2017119422A JP2017119422A JP2016191624A JP2016191624A JP2017119422A JP 2017119422 A JP2017119422 A JP 2017119422A JP 2016191624 A JP2016191624 A JP 2016191624A JP 2016191624 A JP2016191624 A JP 2016191624A JP 2017119422 A JP2017119422 A JP 2017119422A
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Abstract
Description
本発明は、アルミニウム合金を用いた展伸部材と繊維強化樹脂材との複合化を図った構造部材に関する。 The present invention relates to a structural member in which a stretched member using an aluminum alloy and a fiber reinforced resin material are combined.
車両の分野において、バンパーリインフォース，ドアビーム等の構造部材には軽量化，耐衝撃吸収性，高剛性等が要求される。
アルミニウム合金を用いた構造材は高強度の軽量部材ではあるが、近年さらなる軽量化，耐衝撃吸収性が要求される。
例えば、特許文献１には角パイプの４つの側面にそれぞれ溝を設けてＣＦＲＰ平板を嵌合接着したＣＦＲＰ補強パイプを開示する。
しかし、同公報に開示する複合部材は、捩り剛性の向上を目的としたものであり、曲げ剛性向上を目的としたものでないため、４つの側面全てにＣＦＲＰを嵌合接着することは製造工数が大きく、高価となる。
特許文献２には、衝撃荷重が作用する側が塑性変形容易な衝撃吸収材（アルミニウム合金）、その反対側が高強度軽量材（繊維強化プラスチック）からなるビーム状の部材を開示する。
しかし、同公報に開示する複合部材は、衝撃吸収材が塑性変形するように、引っ張り側に繊維強化プラスチックを用いたものであり、同公報に炭素繊維よりもガラス繊維で強化されたプラスチックの方がよいと明記されているとおり、ビーム部材の全長の撓みを大きくするのが目的である。
よって、ポール衝突等の局部的な衝撃には耐えられなく、ガラス繊維強化プラスチックが破断する恐れが高い。
特許文献３には、金属材と繊維強化プラスチック材とを粘着剤で粘着接合する複合部材を開示する。
しかし、同公報に開示する発明は、リサイクル時に２つの材料を分離しやすくするのが目的であり、高剛性の向上には不充分である。
In the field of vehicles, structural members such as bumper reinforcements and door beams are required to be lightweight, shock-absorbing, and highly rigid.
A structural material using an aluminum alloy is a high-strength lightweight member, but in recent years, further weight reduction and impact resistance are required.
For example,
However, since the composite member disclosed in the publication is intended to improve torsional rigidity and not to improve bending rigidity, fitting and bonding CFRP to all four side surfaces requires a lot of manufacturing steps. Large and expensive.
However, the composite member disclosed in the publication uses fiber reinforced plastic on the pull side so that the shock absorber is plastically deformed. In the publication, the plastic reinforced with glass fiber rather than carbon fiber is used. The purpose is to increase the deflection of the entire length of the beam member.
Therefore, it cannot withstand a local impact such as a pole collision, and the glass fiber reinforced plastic is likely to break.
However, the invention disclosed in the publication is intended to facilitate separation of two materials during recycling, and is insufficient for improving high rigidity.
本発明は、軽量で高剛性であるアルミニウム合金展伸部材と炭素繊維強化部材とを複合化した構造部材の提供を目的とする。 An object of the present invention is to provide a structural member in which an aluminum alloy extending member and a carbon fiber reinforced member that are lightweight and highly rigid are combined.
本発明に係る構造部材は、所定の長さを有するバー状の構造部材であって、アルミニウム合金を用いた展伸部材と、展伸部材に表面側から圧縮曲げ荷重を受けた際に引張応力が発生する裏面側に接着剤にて接着接合した炭素繊維強化樹脂部材とを有し、前記炭素繊維強化樹脂部材は展伸部材の長手方向に配向した炭素繊維を体積率で５０〜７０％含有するシート状の複合材であることを特徴とする。
ここで所定の長さを有するバー状の構造部材と表現したのは、車両や各種産業機械等の構造部材として使用できるだけの所定の長さを有するものをいう。
車両用の構造部材としては、バンパーリインフォース，ドアビーム等が例として挙げられる。
このような構造部材にポール衝突等の曲げ圧縮荷重が表面側に加わると、それが裏面側の炭素繊維強化樹脂部材に引張応力荷重として伝達される。
そこで本発明は、体積率で５０〜７０％含有する炭素繊維を構造部材の長手方向に配向させた炭素繊維強化樹脂（ＣＦＲＰ）を用いた。
The structural member according to the present invention is a bar-shaped structural member having a predetermined length, and includes a stretch member using an aluminum alloy and a tensile stress when the stretch member is subjected to a compressive bending load from the surface side. And a carbon fiber reinforced resin member bonded and bonded with an adhesive on the back surface side where the carbon fiber reinforced resin member contains 50 to 70% by volume of carbon fibers oriented in the longitudinal direction of the stretched member. It is characterized by being a sheet-like composite material.
Here, the expression "bar-shaped structural member having a predetermined length" means a member having a predetermined length that can be used as a structural member for a vehicle, various industrial machines, or the like.
Examples of the structural member for the vehicle include bumper reinforcement, door beams, and the like.
When a bending compression load such as a pole collision is applied to such a structural member on the front surface side, it is transmitted as a tensile stress load to the carbon fiber reinforced resin member on the back surface side.
Therefore, the present invention uses a carbon fiber reinforced resin (CFRP) in which carbon fibers containing 50 to 70% by volume are oriented in the longitudinal direction of the structural member.
本発明に係るアルミニウム合金からなる展伸部材は、０．２％耐力値で４２０ＭＰａ以上のものが好ましい。
高耐力の展伸部材を用いることで、軽量化を図ることができる。
ここで展伸部材は、押出材，引抜材等であってよく、アルミニウム合金の化学組成はＪＩＳ７０００系であって、下記の範囲のものを用いることができる。
以下、全て質量％で、Ｚｎ：６．０〜７．２％，Ｍｇ：１．０〜１．９％，Ｃｕ：０．１〜０．４％，Ｚｒ：０．１５〜０．２５％，Ｔｉ：０．０５％以下であって、残部がＡｌと不純物である。
ここで好ましくは、Ｚｎ：６．４〜７．０％，Ｍｇ：１．０５〜１．６０％，Ｃｕ：０．２〜０．３％である。
なお、不純物としては、Ｓｉ：０．１％以下，Ｆｅ：０．２５％以下が好ましい。
また、Ｃｒは０．００１〜０．０５％、Ｍｎは０．３％以下の範囲にて含まれていてもよい。
展伸部材の断面形状としては、コ字形状等異形状のソリッド断面形状や口字形状，日字形状，目字形状等の中空断面形状であってもよい。
The stretch member made of an aluminum alloy according to the present invention preferably has a 0.2% proof stress value of 420 MPa or more.
Weight reduction can be achieved by using a high-strength extension member.
Here, the extending member may be an extruded material, a drawn material, or the like, and the chemical composition of the aluminum alloy is JIS 7000 series, and those in the following ranges can be used.
Hereinafter, all are mass%, Zn: 6.0-7.2%, Mg: 1.0-1.9%, Cu: 0.1-0.4%, Zr: 0.15-0.25% , Ti: 0.05% or less, with the balance being Al and impurities.
Here, Zn: 6.4 to 7.0%, Mg: 1.05 to 1.60%, Cu: 0.2 to 0.3% are preferable.
The impurities are preferably Si: 0.1% or less and Fe: 0.25% or less.
Further, Cr may be contained in a range of 0.001 to 0.05% and Mn in a range of 0.3% or less.
The cross-sectional shape of the expanding member may be a solid solid cross-sectional shape such as a U-shape or a hollow cross-sectional shape such as a mouth shape, a Japanese character shape, or a square shape.
本発明において、炭素繊維強化樹脂部材は、接着面に炭素繊維が露出するように加工してあってもよく、このように接着面に炭素繊維を例えばショットブラスト等にて露出させることで接着剤による密着性が向上する。
また、上記露出面の面粗さは、Ｒｚ＝５〜５０μｍの範囲、好ましくはＲｚ＝２０〜３０μｍの範囲である。
In the present invention, the carbon fiber reinforced resin member may be processed so that the carbon fiber is exposed on the bonding surface, and thus the carbon fiber is exposed on the bonding surface by, for example, shot blasting or the like. Adhesion due to is improved.
The surface roughness of the exposed surface is in the range of Rz = 5 to 50 μm, preferably in the range of Rz = 20 to 30 μm.
本発明において、接着剤は接着剪断力１５ＭＰａ以上であるのが好ましい。
また、接着剤の伸びは、７５％以上で２５０％以下が好ましい。
これにより、アルミニウム合金からなる展伸部材の曲げ変形に追随しつつ、補強効果が発現する。
In the present invention, the adhesive preferably has an adhesive shearing force of 15 MPa or more.
The elongation of the adhesive is preferably 75% or more and 250% or less.
Thereby, the reinforcement effect is expressed while following the bending deformation of the extending member made of the aluminum alloy.
本発明に係る構造部材にあっては、アルミニウム合金の展伸部材に押し込み方向の曲げ荷重が負荷されると反対側のＣＦＲＰ部材に引張応力として伝達されるので、全体として変形量を抑えつつ耐荷重が向上し、軽量化を図るのに有効である。 In the structural member according to the present invention, when a bending load in the pushing direction is applied to the aluminum alloy extension member, it is transmitted as tensile stress to the CFRP member on the opposite side. It is effective in improving the load and reducing the weight.
以下、各種条件にて構造部材を製作し評価したので、説明する。
図１の表に示した化学組成のアルミニウム合金の溶湯を調整し、直径８インチの円柱ビレットを鋳造した。
鋳造したビレットを図２の表中、ＨＯＭＯ保持温度にて均質化処理した。
なお、均質化処理温度は５００〜５４０℃の範囲が好ましい。
断面目字形状の押出形材を押出成形した。
押出条件を図２の表に示す。
なお、ビレットの温度は４９０〜５３０℃の範囲、押出時のダイス温度は４４０〜５００℃の範囲が好ましい。
押出直後にファン冷却を行うことで冷却速度を８０℃／ｍｉｎ以上、好ましくは１００℃／ｍｉｎ以上にするのがよい。
その後に５０〜１４０℃＋１４０〜２００℃の二段人工時効処理をした。
押出形材の物性値を図２の表に示す。
本発明において、耐力４２０ＭＰａ以上、伸び１０％以上を目標とした。
表中、＜靭性＞はＪＩＳ Ｚ ２２４２「金属材料のシャルピー衝撃試験方法」に従って試験を行った。
目標は１２Ｊ／ｃｍ２以上とした。
＜ＳＣＣ＞は、ＪＩＳ Ｈ ８７１１「アルミニウム合金の応力腐食割れ試験方法」に従って行い、３点曲げ治具にて４０％応力値を負荷した状態で試験をした。
再結晶を起える亀裂が発生するまでの時間を評価した。
なお、目標は７２ｈｒ以上とした。
＜再結晶率＞は押出形材の断面積に対する再結晶層の面積比率を求めた。
目標は２０％以下とした。
評価に用いたＣＦＲＰ部材の物性値を図３に示す。
なお、表中ＣＦ繊維方向０°とは、長手方向に配向していることを意味する。
アルミニウム合金の押出形材とＣＦＲＰ部材との接着条件を図４の表に示す。
なお、比較例１３は、ＣＦＲＰ部材を貼り合せてない構造部材である。
評価に用いたサンプルの断面を図７に示す。
接着層の厚みは５０μｍ〜１ｍｍの範囲で剛性に顕著な差は現れなかった。
Hereinafter, since the structural member was manufactured and evaluated on various conditions, it demonstrates.
A molten aluminum alloy having the chemical composition shown in the table of FIG. 1 was prepared, and a cylindrical billet having a diameter of 8 inches was cast.
The cast billet was homogenized at the HOMO holding temperature in the table of FIG.
The homogenization temperature is preferably in the range of 500 to 540 ° C.
An extruded profile having a cross-sectional shape was extruded.
The extrusion conditions are shown in the table of FIG.
The billet temperature is preferably in the range of 490 to 530 ° C, and the die temperature during extrusion is preferably in the range of 440 to 500 ° C.
The cooling rate is 80 ° C./min or more, preferably 100 ° C./min or more by performing fan cooling immediately after extrusion.
Thereafter, a two-stage artificial aging treatment of 50 to 140 ° C. + 140 to 200 ° C. was performed.
The physical properties of the extruded profile are shown in the table of FIG.
In the present invention, the target was a yield strength of 420 MPa or more and an elongation of 10% or more.
In the table, <toughness> was tested according to JIS Z 2242 “Charpy impact test method for metal materials”.
The target was 12 J / cm 2 or more.
<SCC> was performed according to JIS H 8711 “Stress corrosion cracking test method of aluminum alloy” and tested in a state where a 40% stress value was loaded with a three-point bending jig.
The time until a crack causing recrystallization occurred was evaluated.
The target was 72 hours or more.
<Recrystallization rate> was determined by determining the area ratio of the recrystallized layer to the cross-sectional area of the extruded profile.
The target was 20% or less.
The physical property values of the CFRP member used for the evaluation are shown in FIG.
In the table, 0 ° in the CF fiber direction means orientation in the longitudinal direction.
The table of FIG. 4 shows the bonding conditions between the extruded shape of the aluminum alloy and the CFRP member.
In addition, the comparative example 13 is a structural member which has not bonded the CFRP member.
A cross section of a sample used for evaluation is shown in FIG.
The thickness of the adhesive layer was in the range of 50 μm to 1 mm, and no significant difference in rigidity appeared.
図６に構造部材の評価方法を示す。
構造部材１０の全長は１２００ｍｍで、ポール２による押し込み荷重Ｆを荷重する側（表面）に展伸部材（押出形材）１１，その反対側の裏面に接着接合したＣＦＲＰ部材１２が位置するように、スパン８８０ｍｍの支点１，１間に載置した。
ポール直径は２０３．２ｍｍであり、下方に向けて一定速度で押し込み、曲げ剛性（ｋＮ／ｍｍ）と全塑性モーメントによる強度（ｋＮｍ）を測定した。
その結果を図５の表に示す。
本発明においては、剛性４．１ｋＮ／ｍｍ以上，強度６０ｋＮｍ以上を目標としたが、実施例１〜６はそれらをクリアーした。
なお、実施例７〜９は上記目標値をクリアーできなかったが、それに近い値を示し、実用的には問題ないレベルであった。
FIG. 6 shows a structural member evaluation method.
The total length of the
The pole diameter was 203.2 mm, and it was pushed downward at a constant speed, and the bending rigidity (kN / mm) and the strength (kNm) due to the total plastic moment were measured.
The results are shown in the table of FIG.
In the present invention, the target was a rigidity of 4.1 kN / mm or more and a strength of 60 kNm or more, but Examples 1 to 6 cleared them.
In Examples 7 to 9, the target value could not be cleared, but it was close to the target value.
評価結果の内容について、具体的に説明する。
図９（ａ）に示すようにＣＦＲＰ材１２の貼付方法として、展伸部材（アルミ押出材）１１の中空断面のリブを有する裏面側に沿って部分的に貼付したもの（図４の接着範囲にて補強率６０％）と、裏面側全面（補強率１００％）とを比較する。
実施例３と４は、図９（ｂ），図１０に示す補強長さ中央部を中心に、Ｌ１＝５００ｍｍと同じで展伸部材の耐力が同等であることから、ＣＦＲＰ材を部分的に貼付しても目標をクリアーできることが明らかになった。
The contents of the evaluation result will be specifically described.
As shown in FIG. 9A, the
Since Examples 3 and 4 are the same as L 1 = 500 mm around the center of the reinforcing length shown in FIG. 9B and FIG. It became clear that the target could be cleared even if it was affixed to.
次に図９（ｂ），図１０に示すように、ＣＦＲＰ材１２を展伸部材１１の中央部にその中心から、Ｌ０＝１０００ｍｍのもの（実施例２）と、Ｌ１＝５００ｍｍのもの（実施例３）とを比較すると、Ｌ１＝５００ｍｍとＬ０＝１０００の半分でも強度及び剛性が目標をクリアーすることが分かる。
Next, as shown in FIGS. 9B and 10, the
接着剤の伸びは、展伸材の曲げ変形に追随させるのに必要であり、実施例１〜９の結果及び比較例１８，１９の結果から７５％以上有するのが好ましく、より好ましくは実施例１〜５に示すように７５〜１２０％の範囲がよい。 The elongation of the adhesive is necessary to follow the bending deformation of the wrought material, and it is preferably 75% or more from the results of Examples 1 to 9 and Comparative Examples 18 and 19, and more preferably the examples. As shown in 1-5, the range of 75-120% is good.
比較例１３はＣＦＲＰ材のないものであり、比較例１０，１２は展伸部材の耐力が４２０ＭＰａ未満であり、構造部材の強度，剛性が目標をクリアーできなかった。
比較例１１，１２は接着剤の伸びが悪く、比較例１５は接着剤の接着剪断強度が低い例である。
In Comparative Example 13, no CFRP material was used. In Comparative Examples 10 and 12, the proof strength of the stretched member was less than 420 MPa, and the strength and rigidity of the structural member could not meet the targets.
Comparative Examples 11 and 12 are examples in which the elongation of the adhesive is poor, and Comparative Example 15 is an example in which the adhesive shear strength of the adhesive is low.
本発明に係る構造材の断面形状例を図８及び図１１に示す。
図８は、裏面側に中央部を中心に幅方向の全体にわたってＣＦＲＰ材を接着した例であり、図１２はリブ付近の裏面側に部分的にＣＦＲＰ材を接着した例である。
この場合に、図９（ｃ）に示すようにＣＦＲＰ材１２は、展伸部材１１の断面肉厚が厚い１１ａよりも相対的に薄い１１ｂ側に接着するのが好ましい。
Examples of the cross-sectional shape of the structural material according to the present invention are shown in FIGS.
FIG. 8 shows an example in which the CFRP material is bonded to the entire back surface in the width direction centering on the center portion, and FIG. 12 is an example in which the CFRP material is partially bonded to the back surface near the rib.
In this case, as shown in FIG. 9C, the
１ 支点
２ ポール
１０ 構造部材
１１ 展伸部材
１２ ＣＦＲＰ部材
1
Claims (4)
アルミニウム合金を用いた展伸部材と、展伸部材に表面側から圧縮曲げ荷重を受けた際に引張応力が発生する裏面側に接着剤にて接着接合した炭素繊維強化樹脂部材とを有し、
前記炭素繊維強化樹脂部材は展伸部材の長手方向に配向した炭素繊維を体積率で５０〜７０％含有するシート状の複合材であることを特徴とする構造部材。 A bar-shaped structural member having a predetermined length,
A stretched member using an aluminum alloy, and a carbon fiber reinforced resin member bonded and bonded with an adhesive to the back side where tensile stress is generated when a compressive bending load is applied to the stretched member from the front side,
The carbon fiber reinforced resin member is a sheet-like composite material containing 50 to 70% by volume of carbon fibers oriented in the longitudinal direction of the stretch member.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102023119040A1 (en) | 2022-07-21 | 2024-02-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | DEVICE AND METHOD FOR PRODUCING A METAL-RESIN COMPOSITE STRUCTURE |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999010168A1 (en) * | 1997-08-21 | 1999-03-04 | Toray Industries, Inc. | Light metal/cfrp structural member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999010168A1 (en) * | 1997-08-21 | 1999-03-04 | Toray Industries, Inc. | Light metal/cfrp structural member |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023119040A1 (en) | 2022-07-21 | 2024-02-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | DEVICE AND METHOD FOR PRODUCING A METAL-RESIN COMPOSITE STRUCTURE |
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