Mechanism of Different Stress-ratio Dependency between Modes I and II Loadings for Delamination Fatigue Crack Growth in CFRP Laminates High Resolution Optical Microscopy and Damage Zone Strain Distribution using µ-DIC
CFRP の層間はく離疲労き裂伝ぱの負荷モードによる応力比依存性の違いのメカニズム 高倍率光学顕微鏡によるその場観察とµ-DIC による損傷領域のひずみ計測
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20234745
- Paper/Info type
- Symposium Text
No.10-23
- Pages
- 1-7(Total 7 p)
- Date of publication
- Dec 2023
- Publisher
- JSAE
- Language
- Japanese
- Event
- JSAE Symposium 2023
Detailed Information
| Author(J) | 1) 北條 正樹 |
|---|---|
| Author(E) | 1) Masaki Hojo |
| Affiliation(J) | 1) 近畿職業能力開発大学校／京都大学 |
| Affiliation(E) | 1) Kinki Polytechnic College／Kyoto University |
| Abstract(J) | CFRPの層間はく離疲労き裂伝ぱ挙動の応力比依存性はモード比に依存する．この違いの機構を高倍率光学顕微鏡によるその場観察とμ-DICによるひずみ分布計測により検討した．モードⅡではき裂先端で樹脂の繰り返し塑性変形が生じΔK支配であった．一方，モードⅠでは樹脂の負荷除荷は非対称な粘弾性挙動を示しKmax支配に近かった． Translation |
| Abstract(E) | Stress-ratio dependency of the delamination fatigue crack growth behavior in CFRP laminates depends on the loading mode (modes I and II). The mechanism for this difference is investigated based on high-resolution optical microscopy and strain distribution using µ-DIC. Reverse plastic deformation is responsible for ΔK controlled crack growth under mode II. On the other hand, nonlinear and non-symmetric deformation of matrix resin during loading and unloading is responsible for Kmax controlled crack growth behavior under mode I. |
