JPS6223811B2 - - Google Patents
Info
- Publication number
- JPS6223811B2 JPS6223811B2 JP55143199A JP14319980A JPS6223811B2 JP S6223811 B2 JPS6223811 B2 JP S6223811B2 JP 55143199 A JP55143199 A JP 55143199A JP 14319980 A JP14319980 A JP 14319980A JP S6223811 B2 JPS6223811 B2 JP S6223811B2
- Authority
- JP
- Japan
- Prior art keywords
- load
- test piece
- disc spring
- constant
- constant load
- 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.)
- Expired
Links
- 238000012360 testing method Methods 0.000 claims description 30
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000000528 statistical test Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0035—Spring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【発明の詳細な説明】
本発明は応力腐食割れ試験における定荷重載荷
装置に係り、特に試験能率の向上を図るのに好適
な定荷重載荷装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant load loading device for stress corrosion cracking tests, and particularly to a constant load loading device suitable for improving test efficiency.
一般に、オートクレーブ等を用いて腐食環境下
におかれた試験片に外部より荷重を加える方法の
１つに定荷重式がある。この定荷重式としては従
来は、例えば第１図ａ，ｂに示すように一端固定
の試験片１に図示しないアクチユエータまたは梃
子等を介して重錘（図示せず）等により矢印方向
に荷重を加える方法を採つている。 Generally, one method of externally applying a load to a test piece placed in a corrosive environment using an autoclave or the like is a constant load method. Conventionally, in this constant load type, as shown in FIGS. 1a and 1b, a load is applied in the direction of the arrow by a weight (not shown) or the like to a test piece 1 fixed at one end via an actuator or lever (not shown). We are using the method of adding
しかしながらこの種の方法では、装置が複雑と
なるとともに、試験機空間および腐食環境空間を
大きくとる必要がある等の難点がある。 However, this type of method has drawbacks such as the need for a complicated apparatus and the need for a large testing machine space and a large corrosive environment space.
本発明はかかる従来の難点を解決するためにな
されたもので、その目的とするところは、特殊環
境下においても容易かつ小さなスペースで試験を
行なうことができる応力腐食割れ試験における定
荷重載荷装置を提供するにある。 The present invention was made in order to solve these conventional difficulties, and its purpose is to provide a constant load loading device for stress corrosion cracking tests that can be easily conducted in a small space even under special environments. It is on offer.
本発明は、荷重載荷部に皿ばねを取付け、この
皿ばねを弾性変形させることにより発生するばね
力（反撥力）を利用して試験片を負荷するように
したものである。 In the present invention, a disc spring is attached to a load carrying part, and a test piece is loaded using the spring force (repulsive force) generated by elastically deforming the disc spring.
以下本発明を図面を参照して説明する。 The present invention will be explained below with reference to the drawings.
第２図は、後に詳述する荷重載荷部に取付けら
れる皿ばね２の特性を示すもので、皿ばね２の中
心に荷重Ｐを加えた場合の荷重Ｐと撓みδとの関
係は、
Ｐ＝Ｃ１ＣＥｈ４／ｒ２ ２ ………(1)
Ｃ＝（α＋１／α−１−２／ｌｏｇα）π（α／α−１
）２………(2)
α＝ｒ２／ｒ１ ………(4)
但し、
Ｃ：係数
C1：荷重係数
Ｅ：縦弾性係数
ｈ：皿ばね２の厚さ
Ｈ：有効高さ
r1：内半径
r2：外半径
ｍ：ポアソン数
となる。したがつて、係数Ｃはαの関数、荷重係
数C1はＨ／ｈとδ／ｈとの関数でそれぞれ表わ
され、荷重Ｐは荷重係数C1に比例する。 Fig. 2 shows the characteristics of the disc spring 2 attached to the load carrying part, which will be described in detail later.When a load P is applied to the center of the disc spring 2, the relationship between the load P and the deflection δ is P= C 1 CEh 4 /r 2 2 ......(1) C=(α+1/α-1-2/logα)π(α/α-1
) 2 ………(2) α= r2 / r1 ......(4) However, C: Coefficient C1 : Load coefficient E: Longitudinal elastic modulus h: Thickness of disc spring 2 H: Effective height r1 : Inner radius r2 : Outer Radius m: Poisson's number. Therefore, the coefficient C is expressed as a function of α, the load coefficient C1 is expressed as a function of H/h and δ/h, and the load P is proportional to the load coefficient C1 .
第３図は、有効高さＨ＝2.17mm、皿ばね２の厚
さｈ＝1.50mm、すなわちＨ／ｈ〓1.45における荷
重係数C1と撓みδとの関係を示すグラフであ
り、この図より、例えば図中の破線間、すなわち
δ／ｈ＝1.0ないし1.4において荷重係数C1＝
1.565ないし1.598が得られる（δ／ｈ＞1.4では皿
ばね２が反転する可能性がある）。 Figure 3 is a graph showing the relationship between the load coefficient C 1 and the deflection δ when the effective height H = 2.17 mm and the thickness h of the disc spring 2 = 1.50 mm, that is, H/h = 1.45. , for example, between the broken lines in the figure, that is, between δ/h=1.0 and 1.4, the loading coefficient C 1 =
1.565 to 1.598 is obtained (if δ/h>1.4, the disc spring 2 may reverse).
すなわち、撓みδ＝1.50ないし2.10mmの変化に
対して荷重Ｐの変動率ΔＰは、
ΔＰ＝Ｃ１ｍａｘ−Ｃ１ｍｉｎ／Ｃ１ｍｉｎ×100……
…(5)
より、2.0（±１）％で、実用上支障なく前記破
線間を定荷重範囲と定めることができる。 That is, the variation rate ΔP of the load P for a change in deflection δ = 1.50 to 2.10 mm is ΔP = C 1 max - C 1 min/C 1 min x 100...
...(5), it is possible to define the constant load range between the broken lines as 2.0 (±1)% without any practical problems.
第４図は本発明の一実施例を示すもので、以下
これについて説明する。 FIG. 4 shows an embodiment of the present invention, which will be explained below.
図において１１は、横方向に切れ込む切欠き１
１ａを有する試験片であり、この試験片１１に
は、縦方向に穿設され下端部が前記切欠き１１ａ
に開口する導通孔１３が設けられ、この導通孔１
３には荷重ロツド１４が遊嵌されている。 In the figure, 11 is a notch 1 cut in the horizontal direction.
1a, and this test piece 11 is perforated in the vertical direction and has the cutout 11a at the lower end.
A conduction hole 13 is provided which opens into the conduction hole 1.
3, a load rod 14 is loosely fitted therein.
荷重ロツド１４は、第４図に示すように導通孔
１３内に上端から遊嵌され下端が切欠き１１ａに
接触するるロツド部１４ａと、試験片１１から突
出するロツド部１４ａの上端に一体に設けられ試
験片１１を負荷する皿ばね１２が載置される受皿
部１４ｂとから構成され、受皿部１４ｂは、ビス
１５を介して試験片１１の上面に固着された断面
門形状の取付台１６の内部に位置している。なお
前記皿ばね１２は、試験荷重および必要撓みに応
じて並列あるいは直線上に複数設けることができ
る。 As shown in FIG. 4, the load rod 14 has a rod portion 14a that is loosely fitted into the through hole 13 from the upper end and whose lower end contacts the notch 11a, and an upper end of the rod portion 14a that protrudes from the test piece 11. and a saucer part 14b on which a disc spring 12 which is provided and loads the test piece 11 is placed. It is located inside. A plurality of disc springs 12 may be provided in parallel or in a straight line depending on the test load and required deflection.
この皿ばね１２には、第４図に示すようにその
中心部に受座１７が設置され、この受座１７は、
前記取付台１６に螺入し荷重ロツド１４と軸心を
等しくして配されたボルト１８により応圧される
ようになつている。 A catch 17 is installed in the center of the disc spring 12 as shown in FIG.
It is adapted to be pressurized by a bolt 18 which is screwed into the mounting base 16 and placed so that its axis is the same as that of the load rod 14.
次に前述した実施例の作用について説明する。 Next, the operation of the above-described embodiment will be explained.
試験に際しては、まず試験片１１の導通孔１３
に荷重ロツド１４のロツド部１４ａを挿入し、受
皿部１４ｂに皿ばね１２および受座１７を設置す
る。 During the test, first the conduction hole 13 of the test piece 11 is
The rod portion 14a of the load rod 14 is inserted into the tray portion 14b, and the disc spring 12 and the tray 17 are installed in the tray portion 14b.
次いで、試験片１１の上面にビス１５を介して
取付台１６を固着し、ボルト１８を締付ける。す
ると、ボルト１８の下降により受座１７を介して
皿ばね１２が押圧される。この際、ボルト１８の
回動量を調整して皿ばね１２に第３図に示すよう
な定荷重範囲の撓みを加えることにより、荷重ロ
ツド１４を介して試験片１１の切欠き１１ａに定
荷重応力を与えることができる。 Next, a mounting base 16 is fixed to the upper surface of the test piece 11 via a screw 15, and a bolt 18 is tightened. Then, the lowering of the bolt 18 presses the disc spring 12 via the seat 17. At this time, by adjusting the amount of rotation of the bolt 18 and applying a deflection in a constant load range to the disc spring 12 as shown in FIG. can be given.
このように定荷重応力が与えられた試験片１１
は、皿ばね１２等を装着したままで腐食環境下に
おかれる。 Test piece 11 to which constant load stress was applied in this way
is placed in a corrosive environment with the disc spring 12 etc. attached.
第５図は本発明の他の実施例を示すもので、以
下これについて説明する。 FIG. 5 shows another embodiment of the present invention, which will be described below.
図において１９は枠体であり、この枠体１９に
は棒状の試験片２１が貫通配置され、この試験片
２１の下端部にはナツト２０が螺着されていると
ともに試験片２１の上端部にはナツト２３が螺着
されている。そして、ナツト２３と枠体１９上面
との間にはリング状の皿ばね２２および受座２７
がそれぞれ介装されている。 In the figure, 19 is a frame body, and a rod-shaped test piece 21 is inserted through the frame body 19. A nut 20 is screwed to the lower end of the test piece 21, and a nut 20 is screwed to the upper end of the test piece 21. A nut 23 is screwed on. A ring-shaped disc spring 22 and a catch seat 27 are provided between the nut 23 and the upper surface of the frame 19.
are interposed respectively.
しかして、ナツト２３を回動調整することによ
り、皿ばね２２には所定の撓みが加えられ、試験
片２１に定荷重引張応力が与えられることにな
る。 By adjusting the rotation of the nut 23, a predetermined deflection is applied to the disc spring 22, and a constant load tensile stress is applied to the test piece 21.
なお、試験片１１，２１のクリープ等の歪変化
は皿ばね１２，２２の定荷重特性（第３図におけ
る破線間）により吸収されるので、本装置は高温
高圧等におけるクリープ試験にも適用できる。 Note that since strain changes such as creep in the test pieces 11 and 21 are absorbed by the constant load characteristics of the disc springs 12 and 22 (between the broken lines in Figure 3), this device can also be applied to creep tests at high temperatures and high pressures. .
以上本発明を好適な実施例に基づいて説明した
が、本発明によれば、皿ばねの定荷重特性を利用
して試験片に定荷重負荷を与えることができるの
で、装置が簡単になり、かつこの負荷状態で試験
片を特殊環境下に多数設置し、同時に応力腐食割
れ試験を行なうことにより、統計的試験結果が得
られ、確率精度と試験能率とを向上させることが
できる。 The present invention has been described above based on preferred embodiments, but according to the present invention, a constant load can be applied to a test piece by utilizing the constant load characteristics of a disc spring, so the apparatus becomes simple. In addition, by placing a large number of test pieces under this load in a special environment and simultaneously performing a stress corrosion cracking test, statistical test results can be obtained and probability accuracy and test efficiency can be improved.
第１図ａ，ｂは試験片に定荷重を与える従来方
法をそれぞれ示す説明図、第２図は皿ばねの特性
を示す説明図、第３図は荷重係数と撓みとの関係
を示すグラフ、第４図は本発明の一実施例を示す
部分断面図、第５図は本発明の他の実施例を示す
断面図である。
１１，２１……試験片、１２，２２……皿ば
ね、１４……荷重ロツド、１６……取付台、１
７，２７……受座、１８……ボルト、１９……枠
体、２０，２３……ナツト。
Figures 1a and b are explanatory diagrams showing the conventional method of applying a constant load to a test piece, Figure 2 is an explanatory diagram showing the characteristics of a disc spring, and Figure 3 is a graph showing the relationship between load coefficient and deflection. FIG. 4 is a partial sectional view showing one embodiment of the invention, and FIG. 5 is a sectional view showing another embodiment of the invention. 11, 21... Test piece, 12, 22... Belleville spring, 14... Load rod, 16... Mounting base, 1
7, 27... catch, 18... bolt, 19... frame, 20, 23... nut.
Claims (1)
重を加える定荷重載荷装置において、荷重載荷部
にたわみの変化に対して荷重の変動率がほぼ一定
となるように荷重係数を設定して皿ばねを取付
け、この皿ばねのばね力により前記試験片を負荷
することを特徴とする応力腐食割れ試験における
定荷重載荷装置。1. In a constant load loading device that applies a constant load from the outside to a test piece placed in a corrosive environment, a load coefficient is set so that the rate of change in load is approximately constant with respect to changes in deflection at the load loading section. A constant load loading device for stress corrosion cracking testing, characterized in that a disc spring is attached and the test piece is loaded by the spring force of the disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14319980A JPS5767843A (en) | 1980-10-14 | 1980-10-14 | Constant load imposing device in stress corrosion cracking test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14319980A JPS5767843A (en) | 1980-10-14 | 1980-10-14 | Constant load imposing device in stress corrosion cracking test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5767843A JPS5767843A (en) | 1982-04-24 |
| JPS6223811B2 true JPS6223811B2 (en) | 1987-05-25 |
Family
ID=15333170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14319980A Granted JPS5767843A (en) | 1980-10-14 | 1980-10-14 | Constant load imposing device in stress corrosion cracking test |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5767843A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60112034A (en) * | 1983-11-22 | 1985-06-18 | Fuji Photo Film Co Ltd | Silver halide photosensitive material |
| GB2348001A (en) * | 1999-03-16 | 2000-09-20 | Masstech Int Ltd | Detecting chemical contaminants |
| US7111580B1 (en) | 2000-03-15 | 2006-09-26 | Masstech International Limited | Device for detecting the presence of a chemical contaminant |
| KR100900881B1 (en) | 2007-05-22 | 2009-06-04 | 성균관대학교산학협력단 | Test equipment for stress corrosion cracking |
| JP5060347B2 (en) * | 2008-03-06 | 2012-10-31 | 独立行政法人理化学研究所 | Stretching device |
| JP5609360B2 (en) * | 2010-07-21 | 2014-10-22 | 株式会社Ihi | Jig for stress corrosion cracking test |
| CN102706750B (en) * | 2012-07-02 | 2015-04-22 | 西南石油大学 | High-temperature high-pressure constant load stress corrosion experiment method and device |
| JP6012306B2 (en) * | 2012-07-06 | 2016-10-25 | 三菱重工業株式会社 | Prediction method of stress corrosion cracking |
| CN104215511A (en) * | 2013-05-29 | 2014-12-17 | 深圳市海洋王照明工程有限公司 | Cable environmental stress testing apparatus |
| CN105136565B (en) * | 2015-09-18 | 2017-06-27 | 吉林大学 | A kind of off-line type loading method of bonded joint weatherability experiment |
| CN105973793B (en) * | 2016-05-30 | 2019-01-18 | 中国科学院金属研究所 | A kind of underground stress corrosion test method and device |
| CN109632523B (en) * | 2019-01-02 | 2021-07-13 | 南京工业大学 | Test method and device for realizing synergistic effect of corrosion and creep of high-temperature molten salt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4412878Y1 (en) * | 1965-08-25 | 1969-05-28 |
-
1980
- 1980-10-14 JP JP14319980A patent/JPS5767843A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4412878Y1 (en) * | 1965-08-25 | 1969-05-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5767843A (en) | 1982-04-24 |
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