周振功
断裂力学、复合材料力学、压电材料力学性能分析、电磁材料失效性能分析、功能梯度材料和非局部理论应用分析等
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- 姓名:周振功
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学术头衔:
博士生导师,
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学科领域:
水文学
- 研究兴趣:断裂力学、复合材料力学、压电材料力学性能分析、电磁材料失效性能分析、功能梯度材料和非局部理论应用分析等
周振功:男,1963年1月出生。教授,博士生导师。黑龙江省杰出青年基金获得者。1986年7月毕业于河南师大数学系,在1989年7月和1992年9月分别获哈尔滨工业大学固体力学专业硕士和博士学位。1992年10月至1994年9月在西安交通大学工程力学所博士后流动站工作。长期从事断裂力学、复合材料力学、压电材料力学性能分析、电磁材料失效性能分析、功能梯度材料和非局部理论应用分析等方面的研究工作。在压电材料、功能梯度材料及电磁多功能耦合材料性能评价分析方面,以及非局部理论应用等研究方面,首次把非局部理论应用到压电材料性能分析中,拓宽了非局部理论的应用范围,分析了缺陷对电磁材料动态和静态性能的影响问题;另还首次把功能梯度概念引入到电磁材料强度分析中。另负责和参加了“界面可接触型裂纹动态断裂研究”(国家自然科研基金),“含缺陷/损伤复合材料结构强度及损伤判据研究”(国防科工委,“九五”预研项目),“卫星用特种结构件性能分析”(国防科工委,“十五”预研项目),“宏细微观断裂力学中的非局部应用”(黑龙江省自然科学基金),“压电压磁材料破坏强度分析”(黑龙江省自然科学基金),“复合材料桁架结构优化设计分析”(国家863项目子课题)和“多重铁性材料中不同尺度非均匀性与耦合效应关联”(国家自然科研基金重点项目)等项目的研究工作。并于2003年获国家教委科技进步(自然科学类)一等奖一项,2002年获黑龙江省科技进步二等奖一项,2002年获黑龙江省教委科技进步一等奖一项。到目前为止在国际国内刊物和会议上共发表论文93篇(其中第一作者73篇),其中EI收录40篇(其中第一作者30篇),SCI收录55篇(其中第一作者48篇),并且自1999年以来,被SCI收录的论文数连续五年名列哈工大排行榜前列,前四名,2001年度排名第一),同时本人兼任《机械强度》杂志编委。
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周振功, Zhen-Gong Zhou*, Biao Wang, Yu-Guo Sun
International Journal of Solids and Structures 40(2003)747-762,-0001,():
-1年11月30日
In this paper, the dynamic behavior of two parallel symmetric cracks in piezoelectric materials under harmonic antiplane shear waves is investigated by use of the non-local theory for permeable crack surface conditions. To overcome the mathematical difficulties, a one-dimensional non-local kernel is used instead of a two-dimensional one for the problem to obtain the stress occurs near the crack tips. By means of the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations that the unknown variables are the jumps of the displacement along the crack surfaces. These equations are solved using the Schmidt method. Numerical examples are provided. Contrary to the previous results, it is found that no stress and electric displacement singularity is present near the crack tip. The non-local elastic solutions yield a finite hoop stress near the crack tip, thus allowing for a fracture criterion based on the maximum stress hypothesis. The finite hoop stress at the crack tip depends on the crack length, the frequency of the incident wave, the distance between two cracks and the lattice parameter of the materials, respectively. Contrary to the impermeable crack surface condition solution, it is found that the dynamic electric displacement for the permeable crack surface conditions is much smaller than the results for the impermeable crack surface conditions. The results show that the dynamic field will impede or enhance crack propagation in the piezoelectric materials at different stages of the dynamic load.
Dynamic, Symmetric, Piezoelectric.,
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周振功, Zhen-Gong Zhou*, Biao Wang
International Journal of Solids and Structures 39(2002)4485-4500,-0001,():
-1年11月30日
In this paper, the behavior of two parallel symmetry permeable interface cracks in a piezoelectric layer bonded to two half piezoelectric materials planes subjected to an anti-plane shear loading is investigated by using Schmidt method. By using the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations. These equations are solved using the Schmidt method. This process is quite different from that adopted previously. The normalized stress and electrical displacement intensity factors are determined for different geometric and property parameters for permeable crack surface conditions. Numerical examples are provided to show the effect of the geometry of the interacting cracks, the thickness and the materials constants of the piezoelectric layer upon the stress and the electric displacement intensity factor of the cracks. Contrary to the impermeable crack surface condition solution, it is found that the electric displacement intensity factors for the permeable crack surface conditions are much smaller than the results for the impermeable crack surface conditions.
Piezoelectric materials layer, Schmidt method, Dual integral equations, Parallel interfacial crack
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周振功, ZHEN-GONG ZHOU, SHAN-YI DU and BIAO WANG
,-0001,():
-1年11月30日
In this paper, the behavior of a Griffith crack in a piezoelectric material under anti-plane shear loading is investigated by using the non-local theory for impermeable crack surface conditions. By using the Fourier transform, the problem can be solved with two pairs of dual integral equations. These equations are solved using Schmidt method. Numerical examples are provided. Contrary to the previous results, it is found that no stress and electric displacement singularity is present at the crack tip.
dual integral equations,, Fourier transform,, non-local theory,, piezoelectric materials,, Smidt theory.,
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【期刊论文】Two collinear interface cracks in magneto-electro-elastic composites
周振功, Zhen-Gong Zhou*, Biao Wang, Yu-Guo Sun
International Journal of Engineering Science 42(2004)1155-1167,-0001,():
-1年11月30日
In this paper, the behavior of two symmetric interface cracks between two dissimilar magneto-electroelastic composite half planes under anti-plane shear stress loading is investigated by Schmidt method for the permeable crack surface conditions. By using the Fourier transform, the problem can be solved with a set of triple integral equations in which the unknown variable is the jump of the displacements across the crack surfaces. In solving the triple integral equations, the jump of the displacements across the crack surface is expanded in a series of Jacobi polynomials. Numerical solutions of the stress intensity factor are given. The relations among the electric filed, the magnetic flux and the stress field can be obtained.
Magneto-electro-elastic composites, Interface crack, Triple integral equations
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周振功, Zhen-Gong Zhou*, Jian-Liang Sun, Biao Wang
International Journal of Engineering Science 42(2004)2041-2063,-0001,():
-1年11月30日
In this paper, the behavior of a crack in a piezoelectric material subjected to a uniform tension loading is investigated by means of the non-local theory. Through the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations, in which the unknown variables are the jumps of the displacements across the crack surfaces. To solve the dual integral equations, the displacement jumps are expanded in a series of Jacobi polynomials. Numerical examples are provided to show the effects of the crack length, the materials constants and the lattice parameter on the stress field and the electric displacement field near the crack tips. Unlike the classical elasticity solutions, it is found that no stress and electric displacement singularities are present near crack tips. The non-local elastic solutions yield a finite hoop stress at the crack tip, thus allowing us to using the maximum stress as a fracture criterion.
The non-local theory, Piezoelectric materials, Fourier integral transform, Schmidt method, Lattice parameter
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【期刊论文】Analysis of the dynamic behavior of two parallel symmetric cracks using the non-local theory
周振功, Zhen-Gong Zhou*, Biao Wang, Shan-Yi Du
International Journal of Engineering Science 40(2002)1023-1035,-0001,():
-1年11月30日
In this paper, the dynamic behavior of two parallel symmetric cracks under harmonic anti-plane shear waves is studied using the non-local theory. For overcoming the mathematical difficulties, a one-dimensional non-local kernel is used instead of a two-dimensional one for the problem to obtain the stress occurs near the crack tips. The Fourier transform is applied and a mixed boundary value problem is formulated. Then a set of dual integral equations is solved using the Schmidt method. Contrary to the classical elasticity solution, it is found that no stress singularity is present at the crack tip. The non-local elastic solutions yield a finite hoop stress at the crack tip, thus allowing for a fracture criterion based on the maximum stress hypothesis. The finite hoop stress at the crack tip depends on the crack length, the lattice parameter and the distance between two parallel cracks, respectively.
The non-local theory, Schmidt method, The dual-integral equations, Two parallel cracks, The scattering of
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周振功, Zhen-Gong Zhou*, Biao Wang
International Journal of Engineering Science 40(2002)303-317,-0001,():
-1年11月30日
In this paper, the dynamic behavior of a Griffith crack in a piezoelectric material plane under anti-plane shear waves is investigated by using the non-local theory for impermeable crack face conditions. For overcoming the mathematical difficulties, a one-dimensional non-local kernel is used instead of a two-dimensional one for the anti-plane dynamic problem to obtain the stress and the electric displacement near the crack tips. By using the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations. These equations are solved using the Schmidt method. Contrary to the classical elasticity solution, it is found that no stress and electric displacement singularity is present near the crack tip. The non-local dynamic elastic solutions yield a finite hoop stress near the crack tip, thus allowing for a fracture criterion based on the maximum dynamic stress hypothesis. The finite hoop stress at the crack tip depends on the crack length, the circular frequency of incident wave and the lattice parameter. For comparison results between the non-local theory and the local theory for this problem, the same problem in the pi-ezoelectric materials is also solved by using local theory.
Elastic waves, Piezoelectric materials, Non-local theory, Fourier integral transform, Crack, Schmidt method
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周振功, Zhen-Gong Zhou, Biao Wang, Mao-Sheng Cao
Eur. J. Mech. A/Solids 20(2001)213-226,-0001,():
-1年11月30日
In this paper, the behaviour of two collinear anti-plane shear cracks in a piezoelectric layer bonded to dissimilar half spaces was investigated by a new method for the impermeable crack face conditions. The cracks are vertical to the interfaces of the piezoelectric layer. By using the Fourier transform, the problem can be solved with two pairs of triple integral equations. These equations are solved using Schmidt's method. This process is quite different from that adopted previously. Numerical examples are provided to show the effect of the geometry of the interacting cracks and the piezoelectric constants of the material upon the stress intensity factor of the cracks. 2001
piezo electric materials/, collinear cracks/, intensity factors/, integral equations
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周振功, Zhen-Gong Zhou, Biao Wang, Yu-Guo Sun
Wave Motion 39(2004)213-225,-0001,():
-1年11月30日
In this paper, the dynamic behavior of a finite crack in the functionally graded materials subjected to the harmonic stress waves is investigated by means of the Schmidt method. By use of the Fourier transform and defining the jumps of the displacements across the crack surfaces as the unknown functions, two pairs of dual integral equations are derived. To solve the dual integral equations, the jumps of the displacements across the crack surfaces are expanded in a series of Jacobi polynomials. Numerical examples are provided to show the effects of the crack length, the circular frequency of incident wave and the materials constants upon the stress intensity factor of the crack.
Stress waves scattering, Functionally graded materials, Schmidt method, Dual integral equations
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周振功, ZHOU Zhengong, WU Linzhi, WANG Biao
,-0001,():
-1年11月30日
In this paper, the dynarnic interaction between tow collinear cracks in a piezoelectric material plate under anti-plane shear waver is investigated by using the nom-olcal theory for impermeable crack surfaoe conditions, By using the Fourier transform, the problem can be solved with the belp of two pairs of triple integral equations, These equations are solved using the Schmidt method, This method is more neasonable and more appropriat, Unlike the classical elasticity solution, it is found that mo stress and electric displacement sing ularity is present at the crack tip, The mon-olcal dynamic elastic solutions yield a fioite hoop stess at the crack tip, alloowing for a fractwe criterion based on the maccimum dynamic stress hypothesis.
elastic waves,, crack,, piezoelectric materials,, non-local theory
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