Study on Electromagnetoelastic Analysis of Cracked Materials and Singular Stress Field

裂纹材料电磁弹分析及奇异应力场研究

• 批准号: 63550073
• 负责人: SHINDO Yasuhide
• 金额: $ 1.41万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550073/
• 关键词: Theory of Electromagnetoelasticity; Electromagnetic Fracture Mechanics; Crack; Stress Intensity Factor; Integral Equation; Conductor; Ferromagnetic Body; Piezoelectric Ceramics; 電導体; 動的応答; ピエゾ電気材料

The fracture and deformation of electromagnetic elastic solids (elastic conductors, elastic ferromagnetic bodies, elastic dielectric substances) in electromagnetic fields are investigated.1. Transient Singular Stresses of a Finite Crack in an Elastic Conductor under Electromagnetic ForceIf an electrically conducting cracked materials is used in a magnetic field and electric current field, the current flow is disturbed by the presence of the crack and the electromagnetic body force is caused by the interaction between the magnetic field and the disturbed current. The electromagneto-elastic problem is analyzed for a conductor with a finite crack under an impulsive electric current flow and a constant magnetic field, and the effect of the electromagnetic force on the mechanical behavior of the cracked material is shown.2. Magnetoelastic Interaction of a Soft Ferromagnetic Plate with a Through Crack under BendingA magneto-elastic analysis is presented for the bending of a soft ferromagneti … More c thin plate of finite width with a through crack under a uniform magnetic field. The moment intensity factor is computed and the influence of the magnetic field on the normalized values is displayed graphically.3. Magnetoelastic Wave Scattering in a Cracked Soft Ferromagnetic PlateThe dynamic analysis of a soft ferromagnetic flat plate with a through crack under a uniform magnetic field is considered. The dynamic moment intensity factor versus frequency is computed and the influence of the magnetic field on the normalized values is displayed graphically.4. Bending of a Magnetically Saturated Plate with a Crack in a Uniform Magnetic FieldA magneto-elastic analysis is presented for the bending problem of a magnetically saturated flat plate of finite width with a through crack under a uniform magnetic field. Numerical values on the moment intensity factor are obtained and the results are graphed to display the influence of the magnetic field.5. Magnetoelastic Wave Scattering at a Through Crack in a Conducting PlateWe consider the scattering of time harmonic flexural waves by a through crack in a conducting plate under a uniform magnetic field. We discuss two cases. First, the problem of perfect conductivity is considered. Secondly, the problem of the quasistatic electromagnetic field is considered. The dynamic moment intensity factor versus frequency is computed and the influence of the magnetic field on the normalized values is displayed graphically.6. Electroelastic Interaction of a Piezoelectric Strip with a Finite CrackFollowing the theory of linear piezoelectricity, we consider the electroelastic problem of a finite crack in an orthotropic strip. Numerical calculations are carried out and the stress and electric field intensity factors are shown graphically for piezoelectric ceramics. Less

电磁场中电磁弹性固体（弹性导体，弹性铁磁体，弹性动态物质）的断裂和变形研究了。1。弹性导体中有限裂纹在电子力下的瞬态奇异应力是在磁场和电流场中使用电子传导的裂纹材料，电流的流动受到裂纹的存在和电磁体力的干扰，电磁体力是由磁场和受影响电流之间的相互作用引起的。在冲动电流流动和恒定磁场下具有有限裂纹的导体分析电磁弹性问题，并显示电磁力对裂纹材料机械行为的影响。2。在弯曲的磁弹性分析下，软铁磁板与通过裂纹的磁弹性相互作用提出了软铁磁的弯曲……更多的c薄板有限宽度的薄板，在均匀的磁场下通过裂纹在裂纹的情况下进行弯曲。计算矩强度因子，并以图形方式显示磁场对归一化值的影响3。在均匀的磁场下，在裂纹的软铁磁平板上，在裂纹的软铁磁平板上，磁弹性波散射在软铁磁性平板上进行动态分析。计算动态力矩强度因子与频率，并以图形方式显示磁场对归一化值的影响4。在均匀的磁场磁场磁场弹性分析中弯曲的磁饱和板的弯曲板弯曲的磁场问题是有限宽度的磁饱和平板的弯曲问题，并在均匀的磁场下通过裂纹。获得矩强度因子的数值值，并绘制结果图表以显示磁场的影响。5。电板板中的磁弹性波散射在导电板中的裂纹处，请考虑在均匀磁场下的导电板中通过裂纹通过裂纹的时间谐波柔性波的散射。我们讨论两个案例。首先，考虑了完美的电导率问题。其次，考虑了准静电电磁场的问题。计算动态力矩强度因子与频率，并以图形方式显示磁场对归一化值的影响6。压电带与有限裂纹的电弹性相互作用，以遵循线性压电的理论，我们考虑了正型带中有限裂纹的电弹性问题。进行数值计算，并以图形方式显示了压电陶瓷的应力和电场强度因子。较少的

项目成果

Y.Shindo: "Magnetoelastic Wave Scattering in a Cracked Ferromagnetic Plate" Elastic Waves and Ultrasonic Nodestructive Evaluation, NorthーHolland. 451-452 (1990)

Y. Shindo：“裂纹铁磁板中的磁弹性波散射”弹性波和超声无损评估，北荷兰 451-452 (1990)。

Y.Shindo: "Singular Stress and Electric Fields of a Cracked Piezoelectric Strip" International Journal of Applied Electromagnetics in Materials. (1990)

Y.Shindo：“裂纹压电带的奇异应力和电场”国际材料应用电磁学杂志。

Y.Shindo: "Electromagnetic Twisting of a Through Crack in a Conducting Plate of Finite Width" Proceedings of the International Symposium on Applied Electromagnetics in Materials. (1991)

Y.Shindo：“有限宽度导电板中贯通裂纹的电磁扭转”材料应用电磁学国际研讨会论文集。

Y.Shindo: "Electromagnetic Twisting of a Cracked Conducting Plate" Trans.JSME(A). 55. 1328-1333 (1989)

Y.Shindo：“裂纹导电板的电磁扭曲”Trans.JSME(A)。

Y. Shindo: "Magnetoelastic Wave Scattering in a Cracked Ferromagnetic Plate" Elastic Waves and Ultrasonic Nondestructive Evaluation, North-Holland. 451-452 (1990)

Y. Shindo：“裂纹铁磁板中的磁弹性波散射”弹性波和超声无损评估，北荷兰。