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2005年06月29日

【期刊论文】A triggering criterion of dislocation sourcesunder Mode-Isingular stresses

余寿文， ZHI-XING LU， SHOU-WEN YU and XI-QIAO FENG

International Journal of Fracture 0: 1-6, 2004.，-0001，（）：

-1年11月30日

A triggering criterion is suggested to determine the instability of a dislocation source under Mode-I singular stresses. Two kinds of configurations are considered, including a crack and a wedge formed by climbing dislocations pileup. Numerical results are given and discussed for both the cases.

Brittle-to-ductile transition， crack， dislocation， wedge

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2005年06月29日

【期刊论文】ANTI-PLANE VIBRATION OF RACKED PIEZOELECTRIC MATERIALS

余寿文， Zeng-tao CHEN， and Shou-wen YU

Mechanics Research Communications, Vol. 25, No.3, pp. 321-327. 1998，-0001，（）：

-1年11月30日

摘要

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2005年06月29日

【期刊论文】BOUNDARY LAYERS NEAR INTERFACES BETWEEN CRYSTALS WITH STRAIN GRADIENT EFFECTS

余寿文， Gang-Feng Wang， Shou-Wen Yu， and Xi-Qiao Feng

Mechamcs Research CommumcatJons, Vol. 28, No.1, pp 87-95, 2001，-0001，（）：

-1年11月30日

摘要

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2005年06月29日

【期刊论文】Scattering of SH Waves By An Arc-shaped Crack Between A Cylindrical Piezoelectric Inclusion And Matrix: Near Fields*

余寿文， Wang Xuyue， Yu Shouwen

Key Engineering Materials Vols. 251-252 (2003) pp. 215-220，-0001，（）：

-1年11月30日

摘要

The wave function expansion method and singular integral equations are used to investigate the scattering of SH waves by a cylindrical piezoelectric inclusion partially debonded from piezoelectric matrix. For impermeable crack case, dynamic stress intensity factors are obtained and numerical results show the phenomenon of low frequency resonance for various debonding sizes and incident angles.

Scattering of waves， Piezoelectric inclusion， Near fields

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2005年06月29日

【期刊论文】Micro-scale adhesive contact of a spherical rigid punch on a piezoelectric half-space

余寿文， Z.R. Chen， S.W. Yu*

，-0001，（）：

-1年11月30日

摘要

The micro-scale adhesive contact behavior of a spherical rigid punch on a piezoelectric half-space is investigated in this paper. The governing equations describing the adhesive contact behavior are obtained by using the Maugis-Dugdale (M-D) elastic adhesive contact theory [J. Colloid Interface Sci. 150 (1992) 243]. The solutions for indentation of piezoelectric materials and for elastic adhesive contact can be reduced from the present results in the absence of adhesion effect and piezoelectric effect, respectively. The effect of the electric load on the adhesive contact behavior is analyzed. It is shown that the piezoelectric effect has a significant effect on the adhesive contact behavior of piezoelectric materials. The obtained results will be helpful to understand the micro-indentation properties of piezoelectric materials.

Adhesion， Micro-contact， Piezoelectric materials， Surface effect， Size effect， couple， indentation

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