JPH0872155A - Flatwise compression testing method - Google Patents
Flatwise compression testing methodInfo
- Publication number
- JPH0872155A JPH0872155A JP6234279A JP23427994A JPH0872155A JP H0872155 A JPH0872155 A JP H0872155A JP 6234279 A JP6234279 A JP 6234279A JP 23427994 A JP23427994 A JP 23427994A JP H0872155 A JPH0872155 A JP H0872155A
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- Prior art keywords
- frp
- compression
- flatwise
- specimen
- test method
- 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.)
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- Moulding By Coating Moulds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＦＲＰ（繊維強化プラ
スチック）のフラットワイズ圧縮特性の試験方法に関
し、詳しくは、フラットワイズ圧縮特性に及ぼすＦＲＰ
の繊維強化材構成の影響を知るための試験方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing the flatwise compression characteristics of FRP (fiber reinforced plastic), and more specifically, the FRP that affects the flatwise compression characteristics.
The present invention relates to a test method for knowing the influence of the composition of the fiber reinforcement.
【０００２】[0002]
【従来の技術】ＦＲＰは、軽量で強度が高く、耐食性に
優れるなど、鋼製構造部材の代替品として適した特性を
備えている。最近、ＦＲＰが土木・建築部材等として多
く利用されるようになり、比較的肉厚のＦＲＰ部材をボ
ルトとナットで接合するような場合が増えた。ＦＲＰ部
材をボルトとナットで締め付ける場合、そのＦＲＰ部材
には優れたフラットワイズ圧縮特性が要求される。ＦＲ
Ｐのフラットワイズ圧縮特性とは、図３に示すように、
ＦＲＰ積層板に垂直方向の荷重を加えたときの圧縮特性
をいう。2. Description of the Related Art FRP has characteristics suitable as a substitute for steel structural members, such as light weight, high strength, and excellent corrosion resistance. Recently, FRP has been widely used as a civil engineering / construction member and the like, and an increasing number of cases where a relatively thick FRP member is joined with a bolt and a nut. When the FRP member is tightened with bolts and nuts, the FRP member is required to have excellent flatwise compression characteristics. FR
The flatwise compression characteristic of P is, as shown in FIG.
The compression characteristics when a vertical load is applied to the FRP laminated plate.
【０００３】ＦＲＰの厚さ方向の強度が小さければ、Ｆ
ＲＰはボルト、ナットを締め付けた箇所で圧縮破壊す
る。また、ＦＲＰの強度に著しい異方性がある場合、Ｆ
ＲＰは図４に示したように破壊した箇所から裂ける。し
たがって、ＦＲＰを鋼製構造部材の代替品として用いる
場合、そのＦＲＰは厚さ方向の圧縮強度が高く、フラッ
トワイズ圧縮特性に優れていることが要求される。If the strength of the FRP in the thickness direction is small, F
RP compressively breaks where bolts and nuts are tightened. If the strength of FRP has a significant anisotropy, F
The RP tears from the broken point as shown in FIG. Therefore, when FRP is used as a substitute for a steel structural member, the FRP is required to have high compressive strength in the thickness direction and excellent flatwise compression characteristics.
【０００４】ＦＲＰのフラットワイズ圧縮特性に影響を
及ぼす要因として主なものは、繊維強化材構成と用いる
マトリックス（樹脂組成物）であり、特に繊維強化材構
成の影響は大きい。したがって、優れたフラットワイズ
圧縮特性を得るためには、繊維強化材構成を十分検討し
なければならない。The main factors that influence the flatwise compression characteristics of FRP are the fiber reinforcement composition and the matrix (resin composition) used, and the fiber reinforcement composition has a particularly large effect. Therefore, in order to obtain excellent flatwise compression properties, the fiber reinforced construction must be thoroughly considered.
【０００５】従来、ＦＲＰの圧縮特性を調べる方法とし
ては、ＪＩＳ−Ｋ７０５６（ガラス繊維強化プラスチッ
クの圧縮試験方法）及びＪＩＳ−Ｋ６９１１（熱硬化性
プラスチック一般試験方法）に規定された試験方法があ
るが、これらの試験方法では、肉厚のＦＲＰのフラット
ワイズ圧縮特性に及ぼす繊維強化材構成の影響を適切に
把握することができない。Conventionally, as a method for investigating the compression characteristics of FRP, there are the test methods specified in JIS-K7056 (compression test method for glass fiber reinforced plastics) and JIS-K6911 (general test method for thermosetting plastics). However, with these test methods, it is not possible to properly grasp the influence of the fiber reinforcement composition on the flatwise compression characteristics of the thick FRP.
【０００６】すなわち、ＪＩＳ−Ｋ７０５６の試験方法
は、試験片の厚さを２〜３ｍｍと規定しており、それよ
り厚さの大きいＦＲＰ積層板には適用できない上、この
試験方法は繊維強化材方向に対して平行に荷重を加えた
ときのエッジワイズ圧縮特性を知るものであり、フラッ
トワイズ圧縮特性を知る方法ではない。That is, according to the test method of JIS-K7056, the thickness of the test piece is specified to be 2 to 3 mm, and it cannot be applied to the FRP laminated board having a larger thickness, and this test method is a fiber reinforced material. This is to know the edgewise compression characteristic when a load is applied parallel to the direction, and not to know the flatwise compression characteristic.
【０００７】また、ＪＩＳ−Ｋ６９１１の試験方法で
は、試験片の厚さを２５±０．３ｍｍと規定しており、
それよりも厚さの小さい試験片では圧縮特性に及ぼす繊
維強化材構成の影響を的確につかむことができない。Further, in the test method of JIS-K6911, the thickness of the test piece is specified as 25 ± 0.3 mm,
It is not possible to accurately grasp the influence of the fiber reinforcement composition on the compression characteristics in a test piece having a smaller thickness.
【０００８】このように、ＦＲＰのフラットワイズ圧縮
特性に及ぼす繊維強化材構成の影響を的確に知ることが
できる試験方法は、これまで提案されていない。As described above, no test method has so far been proposed which can accurately know the influence of the fiber reinforcement composition on the flatwise compression characteristics of FRP.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、上記事情に
鑑みてなされたもので、ＦＲＰのフラットワイズ圧縮特
性に及ぼす繊維強化材構成の影響を的確に知ることがで
き、優れたフラットワイズ圧縮特性を示す繊維強化材構
成を調べることが可能なフラットワイズ圧縮試験方法を
提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to accurately know the influence of the fiber reinforcement composition on the flatwise compression characteristics of FRP, and it is possible to obtain an excellent flatwise compression. It is an object of the present invention to provide a flatwise compression test method capable of investigating a fiber reinforced composition showing characteristics.
【００１０】[0010]
【課題を解決するための手段】本発明のフラットワイズ
圧縮試験方法は、上記目的を達成するため、単一の繊維
強化材を含むＦＲＰ単板の１種又は２種以上を積層して
ＦＲＰ積層板を形成し、前記ＦＲＰ積層板から円柱形の
供試体を作製し、前記供試体の上面中央部に供試体より
小径の円柱形の圧縮治具によりＦＲＰ単板の積層面に対
して垂直方向の荷重を加えたときの圧縮強度を測定する
ことを特徴とするフラットワイズ圧縮試験方法を提供す
る（請求項１）。In order to achieve the above object, the flatwise compression test method of the present invention has one or more kinds of FRP veneers containing a single fiber reinforcing material and is laminated by FRP lamination. A plate is formed, a cylindrical specimen is produced from the FRP laminated plate, and a vertical direction is applied to the laminated surface of the FRP single plate by a cylindrical compression jig having a diameter smaller than that of the specimen at the center of the upper surface of the specimen. A flatwise compression test method is provided, which comprises measuring a compressive strength when a load is applied (Claim 1).
【００１１】本発明の試験方法では、ＦＲＰ単板を積層
したＦＲＰ積層板を形成する。ＦＲＰ単板はそれぞれ単
一の繊維強化材を含むもので、例えばロービングのみ、
マットのみ、あるいはロービングクロスのみを含む。Ｆ
ＲＰ積層板は、任意の種類のＦＲＰ単板を積層して作製
する。例えば、同種のＦＲＰ単板を積層してもよく、２
種以上のＦＲＰ単板を積層してもよい。ＦＲＰ単板の厚
さ、ＦＲＰ単板の積層枚数、ＦＲＰ積層板の厚さに限定
はなく、実際の要求に応じて任意に選択することができ
るが、通常、ＦＲＰ単板の厚さは２ｍｍ以上、ＦＲＰ積
層板の厚さは５ｍｍ以上とする。In the test method of the present invention, an FRP laminated plate is formed by laminating FRP single plates. Each FRP veneer contains a single fiber reinforcement, for example only roving,
Includes mats only or roving cloth only. F
The RP laminated plate is produced by laminating arbitrary types of FRP single plates. For example, FRP single plates of the same kind may be laminated, and
You may laminate the FRP single plate of 1 or more types. The thickness of the FRP single plate, the number of laminated FRP single plates, and the thickness of the FRP laminated plate are not limited, and can be arbitrarily selected according to actual requirements, but normally the thickness of the FRP single plate is 2 mm. As described above, the thickness of the FRP laminated plate is set to 5 mm or more.
【００１２】本発明の試験方法では、ＦＲＰ積層板から
円柱形の供試体を作製する。この場合、供試体の直径は
５０ｍｍ以上とすることが好ましい。直径が５０ｍｍよ
りも小さいと、フラットワイズ圧縮特性に及ぼす繊維強
化材構成の影響を的確に知ることが難しくなる。供試体
の直径は５０ｍｍより大きくてもかまわないが、本発明
の試験方法はフラットワイズ圧縮特性を簡便に知る方法
であるため、供試体の直径はできるだけ小さい方が好ま
しい。ＦＲＰ供試体の直径があまり大きくなると取り扱
いにくくなる。なお、供試体の厚さは積層板の厚さと同
じである。In the test method of the present invention, a cylindrical specimen is prepared from the FRP laminated plate. In this case, the diameter of the test piece is preferably 50 mm or more. If the diameter is smaller than 50 mm, it becomes difficult to accurately know the influence of the fiber reinforcement composition on the flatwise compression characteristics. The diameter of the test piece may be larger than 50 mm, but the test method of the present invention is a method for easily knowing the flatwise compression characteristics, and therefore the diameter of the test piece is preferably as small as possible. If the diameter of the FRP specimen becomes too large, it will be difficult to handle. The thickness of the test piece is the same as the thickness of the laminated plate.
【００１３】本発明の試験方法では、供試体の上面中央
部に供試体より小径の円柱形の圧縮治具によりＦＲＰ単
板の積層面に対して垂直方向の荷重を加えたときの圧縮
強度を測定する。すなわち、図１に示すように、ＦＲＰ
単板２を積層したＦＲＰ積層板４から作製した円柱形の
供試体６の上面中央部に圧縮治具８を配置し、この圧縮
治具８に圧縮荷重を加えて供試体６の圧縮強度を測定す
る。In the test method of the present invention, the compressive strength when a load in the direction perpendicular to the laminated surface of the FRP single plate is applied to the central portion of the upper surface of the specimen by a cylindrical compression jig having a diameter smaller than that of the specimen. taking measurement. That is, as shown in FIG.
A compression jig 8 is arranged at the center of the upper surface of a cylindrical test piece 6 made from the FRP laminated plate 4 in which the single plates 2 are stacked, and a compressive load is applied to the compression jig 8 to reduce the compressive strength of the test piece 6. taking measurement.
【００１４】圧縮治具８の寸法は、供試体６の直径及び
高さや、試験機の能力に応じて決めることができる。ま
ず、圧縮治具８の直径は、供試体６の直径の２／１０〜
４／１０程度、特に３／１０程度とすることが適当であ
る。すなわち、ＦＲＰ成形品の実際の使用条件下では、
面荷重部は図２のように荷重集中部及び荷重周辺部での
応力負担によって構成される。したがって、圧縮治具８
の直径は、荷重周辺部での応力負担を考慮して決定する
必要があり、この点から見て上記範囲とすることが望ま
しい。また、圧縮治具８の直径は、圧縮治具８によって
供試体６の荷重を加えたときに、面圧力が試験機で測定
できる範囲の面圧力となるように決定することが好まし
い。圧縮治具８の高さは、供試体６の高さ以上の高さと
することが適当である。すなわち、供試体６の強度が低
く、圧縮治具８が供試体６を貫通することがあることを
考慮すると、圧縮治具８の高さは供試体６の高さ以上と
することが好ましい。The size of the compression jig 8 can be determined according to the diameter and height of the test piece 6 and the capacity of the testing machine. First, the diameter of the compression jig 8 is 2/10 to the diameter of the specimen 6.
It is suitable to be about 4/10, particularly about 3/10. That is, under the actual use conditions of the FRP molded product,
As shown in FIG. 2, the surface load portion is configured by stress loads in the load concentration portion and the load peripheral portion. Therefore, the compression jig 8
The diameter needs to be determined in consideration of the stress load in the peripheral portion of the load, and it is desirable to be in the above range from this point. Further, it is preferable that the diameter of the compression jig 8 is determined such that when the load of the sample 6 is applied by the compression jig 8, the surface pressure becomes a surface pressure within a range that can be measured by a tester. It is appropriate that the height of the compression jig 8 is equal to or higher than the height of the sample 6. That is, considering that the strength of the specimen 6 is low and the compression jig 8 may penetrate the specimen 6, it is preferable that the height of the compression jig 8 is equal to or higher than the height of the specimen 6.
【００１５】また、圧縮治具８は鋼材、特にＪＩＳ−Ｇ
４４０１（炭素工具鋼鋼材）に規定された鋼材ＳＫ−３
で形成することが好ましい。なお、試験時には圧縮治具
８に徐々に圧縮荷重を加えていくが、その際の荷重速度
は１±０．５ｍｍ／分とすることが適当である。The compression jig 8 is made of steel, especially JIS-G.
Steel material SK-3 specified in 4401 (carbon tool steel material)
Is preferably formed. In addition, a compression load is gradually applied to the compression jig 8 during the test, and the load speed at that time is suitably 1 ± 0.5 mm / min.
【００１６】本発明の試験方法では、図２に示すよう
に、圧縮治具８の上方より与えられた圧縮応力（Ｚ軸方
向）の一部は、供試体６内においてせん断応力（Ｘ，Ｙ
軸方向）として伝達される。そのためＦＲＰ積層板の繊
維強化材構成が顕著にフラットワイズ圧縮強度に反映さ
れ、繊維強化材構成をパラメーターとした供試体の強度
評価が可能となる。In the test method of the present invention, as shown in FIG. 2, a part of the compressive stress (Z-axis direction) applied from above the compression jig 8 is shear stress (X, Y) in the specimen 6.
Transmitted in the axial direction). Therefore, the composition of the fiber reinforcement of the FRP laminate is remarkably reflected in the flatwise compressive strength, and the strength of the test piece can be evaluated using the composition of the fiber reinforcement as a parameter.
【００１７】本発明の試験方法は、１種又は２種以上の
繊維強化材層を有するＦＲＰ成形体、例えばＦＲＰ引抜
き成形体の強度評価を行う場合にも適用することができ
る。すなわち、ＦＲＰ成形体から円柱形の供試体を作製
し、この供試体の上面中央部に供試体より小径の円柱形
の圧縮治具により垂直方向の荷重を加えたときの圧縮強
度を測定することによりＦＲＰ成形体の強度評価を行う
ことができる（請求項２）。この場合、請求項１の方法
で測定した圧縮強度と、請求項２の方法で測定した圧縮
強度との関係を調べておけば、ＦＲＰ成形体の強度評価
をより正しく行うことができる。The test method of the present invention can also be applied to the case where the strength of a FRP molded product having one or two or more fiber reinforcement layers, for example, an FRP pultruded molded product is evaluated. That is, a cylindrical specimen is made from the FRP molded body, and the compressive strength is measured when a vertical load is applied to the center of the upper surface of the specimen with a cylindrical compression jig having a smaller diameter than the specimen. The strength of the FRP molded product can be evaluated by (Claim 2). In this case, if the relationship between the compressive strength measured by the method of claim 1 and the compressive strength measured by the method of claim 2 is investigated, the strength of the FRP molded body can be evaluated more accurately.
【００１８】[0018]
【作用】本発明の試験方法では、ロービング、マット、
ロービングクロス等の繊維強化材を用いてＦＲＰ単板を
成形し、さらにそれらの組み合わせを変化させてＦＲＰ
積層板を作製した後、このＦＲＰ積層板から得た供試体
の圧縮強度を測定する。この場合、ＦＲＰ単板の組み合
わせによって供試体のフラットワイズ圧縮特性は異なっ
てくるが、ＦＲＰ単板の組み合わせの違いがなるべく大
きな差となって測定値に表れた方が、実際に成形するＦ
ＲＰの繊維強化材の組み合わせを選択しやすい。また、
厚さが２５ｍｍ以上ある市販品ＦＲＰのフラットワイズ
圧縮特性も本発明の試験方法で測定することができる。In the test method of the present invention, roving, mat,
FRP veneer is molded by using fiber reinforced material such as roving cloth, and the combination of them is changed to FRP.
After producing a laminated board, the compressive strength of the specimen obtained from this FRP laminated board is measured. In this case, the flatwise compression characteristics of the specimen differ depending on the combination of the FRP single plates, but the difference in the combination of the FRP single plates is as large a difference as possible and the measured value indicates the F
It is easy to select a combination of RP fiber reinforcements. Also,
The flatwise compression characteristics of a commercially available FRP having a thickness of 25 mm or more can also be measured by the test method of the present invention.
【００１９】本発明の試験方法では、図２に示したよう
に、圧縮治具８の上方より与えられた圧縮応力（Ｚ軸方
向）の一部は、供試体６内においてせん断応力（Ｘ，Ｙ
軸方向）として伝達される。そのため供試体６の繊維強
化材構成が顕著にフラットワイズ圧縮強度に反映され
る。したがって、本発明の試験方法では、ＦＲＰ単板の
組み合わせの違いによるＦＲＰ積層板のフラットワイズ
圧縮特性の違いが測定値に大きく表れ、繊維強化材構成
をパラメーターとした供試体の強度評価が可能となるの
で、本発明の試験方法を用いることによって、要求に応
じた圧縮特性を得るための繊維強化材構成を容易に選択
することが可能となる。In the test method of the present invention, as shown in FIG. 2, a part of the compressive stress (Z-axis direction) applied from above the compression jig 8 is shear stress (X, Y
Transmitted in the axial direction). Therefore, the fiber reinforcement composition of the sample 6 is remarkably reflected in the flatwise compressive strength. Therefore, in the test method of the present invention, the difference in the flatwise compression characteristics of the FRP laminated plate due to the difference in the combination of the FRP single plates greatly appears in the measured values, and the strength evaluation of the specimen using the fiber reinforced composition as a parameter becomes possible. Therefore, by using the test method of the present invention, it becomes possible to easily select the fiber reinforced material structure for obtaining the compression characteristic according to the demand.
【００２０】[0020]
【実施例】次に、実施例により本発明を具体的に示す
が、本発明は下記実施例に限定されるものではない。EXAMPLES Next, the present invention will be illustrated concretely by examples, but the present invention is not limited to the following examples.
【００２１】１．使用材料 （１）樹脂 ビスフェノール系ビニルエステル樹脂：昭和高分子社製
「リポキシＲ−８０２」 （２）硬化剤 ベンゾイルパーオキシド：化薬アクゾ社製「カドックス
ＢＣＭ−５０」 （３）繊維強化材 ロービング：４４５０g/km 旭ファイバー社製 マット：４５０g/m2 日本電気ガラス社製 ロービングクロス：８００g/m2 日東紡社製1. Materials used (1) Resin Bisphenol-based vinyl ester resin: Showa Polymer Co., Ltd. "Lipoxy R-802" (2) Curing agent Benzoyl peroxide: Kayaku Akzo "Cadox BCM-50" (3) Fiber reinforcement roving : 4450g / km Asahi Fiber Co., Ltd. Mat: 450g / m 2 Nippon Electric Glass Co., Ltd. Roving cloth: 800g / m 2 Nitto Boseki
【００２２】２．試験方法 樹脂と硬化剤とを１００：２の重量比で練り混ぜたもの
をマトリックスとし、各繊維強化材を含む厚さ３ｍｍの
ＦＲＰ単板を熱硬化により成形した。表１に示した組み
合わせにしたがってそれらを貼り合わせ、厚さ１５ｍｍ
のＦＲＰ積層板を作製した後、直径５０ｍｍの円柱形供
試体を切り出した。2. Test Method A 3 mm thick FRP veneer containing each fiber reinforced material was formed by thermosetting using a mixture of a resin and a curing agent kneaded at a weight ratio of 100: 2 as a matrix. They are attached according to the combinations shown in Table 1, and the thickness is 15 mm.
After producing the FRP laminated plate of, a cylindrical specimen having a diameter of 50 mm was cut out.
【００２３】島津製作所製のオートグラフ（容量：２５
ｔ）を用い、図２に示した方法により、供試体の圧縮強
度を測定した。治具はＪＩＳ−Ｇ４４０１に規定する鋼
材ＳＫ−３を用い、直径１５ｍｍ、高さ１５ｍｍの円柱
形とした。また、クロスヘッド速度は１ｍｍ／分とし
た。結果を表２に示す。Shimadzu autograph (capacity: 25
Using t), the compressive strength of the test piece was measured by the method shown in FIG. The jig used was a steel material SK-3 specified in JIS-G4401, and was in the shape of a cylinder having a diameter of 15 mm and a height of 15 mm. The crosshead speed was 1 mm / min. Table 2 shows the results.
【００２４】比較例として、表１に示した組み合わせに
したがって貼り合わせた厚さ１５ｍｍのＦＲＰ積層板か
ら一辺が１５ｍｍの立方体を切り出し、ＪＩＳ−Ｋ６９
１１（熱硬化性プラスチック一般試験方法）に準じて圧
縮強度を測定した。結果を表２に示す。As a comparative example, a cube having a side of 15 mm was cut out from an FRP laminated plate having a thickness of 15 mm and laminated according to the combination shown in Table 1, and JIS-K69 was used.
The compressive strength was measured according to 11 (General Test Method for Thermosetting Plastics). Table 2 shows the results.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】表１、２の結果より、本発明の試験方法に
よれば、繊維強化材構成の違いによるフラットワイズ圧
縮特性の違いが測定値に大きく表れていることがわか
る。すなわち、繊維強化材構成の異なる１〜６の組み合
わせを比較したときに、圧縮特性の大きい値と小さい値
との差が大きく出てくるので、繊維強化材構成の善し悪
しがはっきりとわかる。したがって、本発明の試験方法
によってＦＲＰのフラットワイズ圧縮特性に及ぼす繊維
強化材構成の違いの影響を容易に認識できることが確認
された。From the results shown in Tables 1 and 2, it can be seen that the test values of the present invention greatly show the difference in the flatwise compression characteristics due to the difference in the fiber reinforcement composition. That is, when comparing combinations of 1 to 6 having different fiber reinforcing material configurations, there is a large difference between a large compression characteristic value and a small compression characteristic value, so that it is clearly understood whether the fiber reinforcing material configuration is good or bad. Therefore, it was confirmed that the test method of the present invention can easily recognize the influence of the difference in fiber reinforcement composition on the flatwise compression characteristics of FRP.
【００２８】[0028]
【発明の効果】本発明のフラットワイズ圧縮試験方法で
は、繊維強化材構成の違いに起因するフラットワイズ圧
縮強度の違いが測定値に顕著に表れるため、繊維強化材
構成を変化させたＦＲＰ積層板のフラットワイズ圧縮特
性を容易に把握できる。また、本発明の試験方法はきわ
めて簡単な試験方法であるという利点もある。したがっ
て、本発明の試験方法は、フラットワイズ圧縮特性に及
ぼす繊維強化材構成の違いを知る方法として最適な方法
であり、本発明の試験方法を用いることによって、優れ
たフラットワイズ圧縮特性を有するＦＲＰの繊維強化材
構成を容易に選択することが可能となる。In the flatwise compression test method of the present invention, the difference in the flatwise compressive strength due to the difference in the fiber reinforcement composition is remarkably observed in the measured value. Therefore, the FRP laminated board with the fiber reinforcement composition changed. The flatwise compression characteristics of can be easily grasped. Further, the test method of the present invention has an advantage that it is a very simple test method. Therefore, the test method of the present invention is an optimal method for knowing the difference in fiber reinforcement composition affecting the flatwise compression characteristics, and by using the test method of the present invention, an FRP having excellent flatwise compression characteristics is obtained. It becomes possible to easily select the fiber reinforced material structure.
【図１】図１は、本発明のフラットワイズ圧縮試験方法
を示す概略斜視図である。FIG. 1 is a schematic perspective view showing a flatwise compression test method of the present invention.
【図２】図２は、圧縮治具により与えられる圧縮応力及
びせん断応力を示す概念図である。FIG. 2 is a conceptual diagram showing compressive stress and shear stress applied by a compression jig.
【図３】図３は、フラットワイズ圧縮特性の説明図であ
る。FIG. 3 is an explanatory diagram of flatwise compression characteristics.
【図４】図４は、ＦＲＰ成形品の厚さ方向の圧縮強度が
低く、かつ強度に著しい異方性がある場合の破壊を示す
斜視図である。FIG. 4 is a perspective view showing fracture when the FRP molded product has low compressive strength in the thickness direction and has significant anisotropy in strength.
２ ＦＲＰ単板 ４ ＦＲＰ積層板 ６ 供試体 ８ 圧縮治具 2 FRP single plate 4 FRP laminated plate 6 Specimen 8 Compression jig
Claims (4)
種又は２種以上を積層してＦＲＰ積層板を形成し、前記
ＦＲＰ積層板から円柱形の供試体を作製し、前記供試体
の上面中央部に供試体より小径の円柱形の圧縮治具によ
りＦＲＰ単板の積層面に対して垂直方向の荷重を加えた
ときの圧縮強度を測定することを特徴とするフラットワ
イズ圧縮試験方法。1. A single FRP veneer containing a single fiber reinforcement.
Or two or more kinds of them are laminated to form an FRP laminated plate, a cylindrical specimen is prepared from the FRP laminated plate, and a cylindrical compression jig having a diameter smaller than that of the specimen is provided at the center of the upper surface of the specimen. A flatwise compression test method, which comprises measuring a compressive strength when a load is applied in a direction perpendicular to a laminated surface of an FRP single plate.
し、前記供試体の上面中央部に供試体より小径の円柱形
の圧縮治具により垂直方向の荷重を加えたときの圧縮強
度を測定することを特徴とするフラットワイズ圧縮試験
方法。2. A compressive strength when a cylindrical specimen is produced from an FRP molded body, and a vertical load is applied to a central portion of the upper surface of the specimen by a cylindrical compression jig having a diameter smaller than that of the specimen. A flatwise compression test method characterized by measuring.
０〜４／１０とし、圧縮治具の高さを供試体の高さ以上
の高さとした請求項１記載のフラットワイズ圧縮試験方
法。3. The diameter of the compression jig is 2/1 of the diameter of the specimen.
The flatwise compression test method according to claim 1, wherein the height of the compression jig is 0 to 4/10 and the height is equal to or higher than the height of the specimen.
２記載のフラットワイズ圧縮試験方法。4. The flatwise compression test method according to claim 1, wherein the compression jig is formed of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234279A JPH0872155A (en) | 1994-09-02 | 1994-09-02 | Flatwise compression testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234279A JPH0872155A (en) | 1994-09-02 | 1994-09-02 | Flatwise compression testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0872155A true JPH0872155A (en) | 1996-03-19 |
Family
ID=16968490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6234279A Pending JPH0872155A (en) | 1994-09-02 | 1994-09-02 | Flatwise compression testing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0872155A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190041175A (en) * | 2017-10-12 | 2019-04-22 | 주식회사 엘지화학 | Method for evaluating the impact strength of the composition |
| CN111707544A (en) * | 2020-06-24 | 2020-09-25 | 扬州大学 | FRP rib pressed load holding and testing device and operation method thereof |
| JP2022551348A (en) * | 2019-12-20 | 2022-12-08 | ザ・リサーチ・ファウンデーション・フォー・ザ・ステイト・ユニヴァーシティ・オブ・ニューヨーク | Systems and methods for characterizing equibiaxial compressive strength of two-dimensional woven composites |
-
1994
- 1994-09-02 JP JP6234279A patent/JPH0872155A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190041175A (en) * | 2017-10-12 | 2019-04-22 | 주식회사 엘지화학 | Method for evaluating the impact strength of the composition |
| JP2022551348A (en) * | 2019-12-20 | 2022-12-08 | ザ・リサーチ・ファウンデーション・フォー・ザ・ステイト・ユニヴァーシティ・オブ・ニューヨーク | Systems and methods for characterizing equibiaxial compressive strength of two-dimensional woven composites |
| US11768193B2 (en) | 2019-12-20 | 2023-09-26 | The Research Foundation For The State University Of New York | System and method for characterizing the equibiaxial compressive strength of 2D woven composites |
| CN111707544A (en) * | 2020-06-24 | 2020-09-25 | 扬州大学 | FRP rib pressed load holding and testing device and operation method thereof |
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