JP2011221044A - 金属材料の長寿命疲労強度設計法 - Google Patents
金属材料の長寿命疲労強度設計法 Download PDFInfo
- Publication number
- JP2011221044A JP2011221044A JP2011175147A JP2011175147A JP2011221044A JP 2011221044 A JP2011221044 A JP 2011221044A JP 2011175147 A JP2011175147 A JP 2011175147A JP 2011175147 A JP2011175147 A JP 2011175147A JP 2011221044 A JP2011221044 A JP 2011221044A
- Authority
- JP
- Japan
- Prior art keywords
- area
- size
- stress
- hydrogen
- inclusion
- 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
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
【解決手段】疲労試験結果から破断までの応力繰り返し数とトラップした水素が影響を及ぼしている介在物の周囲の水素影響領域の寸法との関数関係を求め、さらに、金属材料を用いる機械部品の使用想定応力繰り返し数に対応する介在物の拡大後の寸法である等価欠陥寸法を前記関数関係により求め、等価欠陥寸法を許容応力などの長寿命疲労強度の算定に使用して機械部品を設計することにより、機械部品の使用想定寿命に応じたODA寸法の拡大を考慮した破断寿命設計を行うことが可能となる。
【選択図】図4
Description
σ=1.56(HV/9.8+120)/(√area'max *)1/6((1−R)/2)α
(但し、σ:使用想定応力繰り返し数に応じた許容応力(MPa)、HV:ビッカース硬さ(MPa)、R:応力比(=最小応力/最大応力)、α=0.226+HV/9.8×10-4とする)を用いることができる。
図3は使用材料に含まれる介在物の極値統計分布を示す図、図4はODAの成長と破断までの応力繰り返し数Nfとの関係を示す図、図5は実際の機械部品の寸法、生産量および設計寿命に応じた最大欠陥寸法の決定手順を示す図である。
σ=1.56(HV/9.8+120)/(√area')1/6((1−R)/2)α
ここで、σ:使用想定応力繰り返し数に応じた許容応力(MPa)、HV:ビッカース硬さ(MPa)、R:応力比(=最小応力/最大応力)、α:0.226+HV/9.8×10−4である。そして、等価欠陥寸法√area'として上で決定したODAを含めた最大等価欠陥寸法√area'max *(μm)を入力し、使用想定応力繰り返し数に応じた許容応力(MPa)を算出する。
Claims (1)
- 周囲に水素をトラップした非金属介在物を含む金属材料の長寿命疲労強度設計法であって、
疲労試験結果から破断までの応力繰り返し数と前記トラップした水素が影響を及ぼしている非金属介在物の周囲の水素影響領域の寸法との関数関係を、前記破断までの応力繰り返し数Nfおよび前記金属材料に含まれる非金属介在物のうち破断起点となった非金属介在物の面積A0と前記水素影響領域の面積A1とを合わせた面積A0+A1の平方根で表した等価欠陥寸法√area'に対する前記破断起点となった非金属介在物の面積A0の平方根で表した介在物の初期寸法√areaの比√area'/√areaをそれぞれ軸にとってプロットしたグラフに基づいて求める第1のステップ、
前記金属材料を用いる機械部品の使用想定応力繰り返し数に対応する非金属介在物の拡大後の寸法である等価欠陥寸法を前記関数関係により求めるに際し、前記グラフのNf軸上に前記使用想定応力繰り返し数をとって前記関数関係により対応する√area'/√area軸上の値を求めることにより介在物の初期寸法√areaに対する等価欠陥寸法√area'を求める第2のステップ、
前記等価欠陥寸法を許容応力などの超長寿命疲労強度の算定に使用して前記機械部品を設計する第3のステップからなることを特徴とする金属材料の長寿命疲労強度設計法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011175147A JP5007461B2 (ja) | 2011-08-10 | 2011-08-10 | 金属材料の長寿命疲労強度設計法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011175147A JP5007461B2 (ja) | 2011-08-10 | 2011-08-10 | 金属材料の長寿命疲労強度設計法 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001085347A Division JP4857425B2 (ja) | 2001-03-23 | 2001-03-23 | 金属材料の長寿命疲労強度設計法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011221044A true JP2011221044A (ja) | 2011-11-04 |
JP5007461B2 JP5007461B2 (ja) | 2012-08-22 |
Family
ID=45038151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011175147A Expired - Fee Related JP5007461B2 (ja) | 2011-08-10 | 2011-08-10 | 金属材料の長寿命疲労強度設計法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5007461B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015138018A (ja) * | 2014-01-24 | 2015-07-30 | 日本精工株式会社 | 転がり支持装置や動力伝達装置用構成部品の使用限界応力推定方法、及び該構成部品の疲れ寿命予測方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110849753B (zh) * | 2019-12-09 | 2020-09-29 | 大连理工大学 | 一种基于微观划痕的金属材料疲劳强度预测方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3957450A (en) * | 1973-01-15 | 1976-05-18 | General Electric Company | Article of manufacture with pre-determined fatigue life |
US5419201A (en) * | 1993-02-25 | 1995-05-30 | Li; Yuanfeng | Methods and devices for electrochemically determining metal fatigue status |
JPH11230961A (ja) * | 1998-02-18 | 1999-08-27 | Nireco Corp | 材料中の最大欠陥又は最大介在物予測方法と装置 |
US6026691A (en) * | 1995-06-30 | 2000-02-22 | University Of Pennsylvania | Methods and devices for electrochemically determining metal fatigue status |
US6704664B2 (en) * | 2001-12-18 | 2004-03-09 | Visteon Global Technologies, Inc. | Fatigue sensitivity determination procedure |
-
2011
- 2011-08-10 JP JP2011175147A patent/JP5007461B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3957450A (en) * | 1973-01-15 | 1976-05-18 | General Electric Company | Article of manufacture with pre-determined fatigue life |
US5419201A (en) * | 1993-02-25 | 1995-05-30 | Li; Yuanfeng | Methods and devices for electrochemically determining metal fatigue status |
US6026691A (en) * | 1995-06-30 | 2000-02-22 | University Of Pennsylvania | Methods and devices for electrochemically determining metal fatigue status |
JPH11230961A (ja) * | 1998-02-18 | 1999-08-27 | Nireco Corp | 材料中の最大欠陥又は最大介在物予測方法と装置 |
US6704664B2 (en) * | 2001-12-18 | 2004-03-09 | Visteon Global Technologies, Inc. | Fatigue sensitivity determination procedure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015138018A (ja) * | 2014-01-24 | 2015-07-30 | 日本精工株式会社 | 転がり支持装置や動力伝達装置用構成部品の使用限界応力推定方法、及び該構成部品の疲れ寿命予測方法 |
Also Published As
Publication number | Publication date |
---|---|
JP5007461B2 (ja) | 2012-08-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4857425B2 (ja) | 金属材料の長寿命疲労強度設計法 | |
Spriestersbach et al. | Influence of different non-metallic inclusion types on the crack initiation in high-strength steels in the VHCF regime | |
Schönbauer et al. | The influence of various types of small defects on the fatigue limit of precipitation-hardened 17-4PH stainless steel | |
JP5503608B2 (ja) | 円筒形金属素材の疲労破壊評価方法 | |
Zeng et al. | Investigation on rolling contact fatigue of railway wheel steel with surface defect | |
Takahashi et al. | Improvement of fatigue limit by shot peening for high‐strength steel containing a crack‐like surface defect | |
Berto et al. | Multiaxial fatigue strength of severely notched cast iron specimens | |
Tovo et al. | Experimental investigation of the multiaxial fatigue strength of ductile cast iron | |
Donzella et al. | A failure assessment diagram for components subjected to rolling contact loading | |
JP5007461B2 (ja) | 金属材料の長寿命疲労強度設計法 | |
Donzella et al. | Influence of inclusion content on rolling contact fatigue in a gear steel: experimental analysis and predictive modelling | |
CN110967267A (zh) | 一种判定疲劳裂纹萌生寿命的试验方法 | |
Cheng et al. | Effect of thermal induced porosity on high-cycle fatigue and very high-cycle fatigue behaviors of hot-isostatic-pressed Ti-6Al-4V powder components | |
Nakagawa et al. | Improvement in fatigue limit by shot peening for high-strength steel containing crack-like surface defect: influence of surface crack aspect ratio | |
Takahashi et al. | Effects of shot peening on the torsional fatigue limit of high‐strength steel containing an artificial surface defect | |
Lang et al. | Very high cycle fatigue resistance of the low alloyed steel 42CrMo4 in medium-and high-strength quenched and tempered condition | |
Li et al. | Experimental study on very high cycle fatigue of martensitic steel of 2Cr13 under corrosive environment | |
Pereira et al. | Correlation between fractographic aspects and stress intensity factor in very high cycle fatigue | |
Li et al. | Interior microscopic cracking behavior and microstructure-fatigue based damage evaluation of case-hardened steels under variable amplitude loading | |
Zambrano et al. | Self-arresting fatigue cracks at notches in nodular cast iron | |
JP2017083325A (ja) | 金属材料の余寿命予測方法 | |
Beretta et al. | Fatigue strength in presence of inhomogeneities: influence of constraint | |
JP7167748B2 (ja) | 超音波疲労試験用試験片及び超音波疲労試験方法 | |
Yongzhen et al. | Effect of Ultrasonic Impact on Corrosion Fatigue Properties of Titanium Alloy Welded Joints | |
Purnowidodo et al. | The crack growth behavior after overloading on rotating bending fatigue |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110811 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20111201 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20111201 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120410 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120508 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20120510 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5007461 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150608 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |