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损伤各向异性
相关语句
  相似匹配句对
     Elastic Anisotropic Damage
     弹性各向异性损伤
短句来源
     Anisotropic Damage Model for Concrete
     混凝土各向异性损伤模型
短句来源
     ANISOTROPY OF POLYIMIDE FILMS
     聚酰亚胺的各向异性
短句来源
     Duodenal injuries
     十二指肠损伤
短句来源
     Radiation injury of blood vessels
     血管的辐射损伤
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  damage anisotropy
The laminate is irradiated with heavy ions creating a vertical damage anisotropy (individual ion tracks) in the polymer layer.
      
There may also be brittle damage anisotropy with a more complicated relationship to large-scale viscous deformation than mantle LPO.
      


A mathematical cognition model on anisotropic void damage by multi directional tomography is established in the present paper. The volumetric density and the shape parameters of the voids are adopted as the meso-damage characterization. These damage parameters are related to the statistical distribution of the multi-directional tomography spectra. The analysis indicates that the extent of the void damage can be resolved through the mean value of multi-directional tomography spectra and the anisotropy through...

A mathematical cognition model on anisotropic void damage by multi directional tomography is established in the present paper. The volumetric density and the shape parameters of the voids are adopted as the meso-damage characterization. These damage parameters are related to the statistical distribution of the multi-directional tomography spectra. The analysis indicates that the extent of the void damage can be resolved through the mean value of multi-directional tomography spectra and the anisotropy through the standard deviations.

建立各向异性孔洞损伤的多方位层析识别数学模型。通过引进孔洞分布密度及形状参数作为损伤特征量,给出损伤参数与多方位层析信号的均值和方差的关系,表明可由多方位层析信号的均值来识别孔洞损伤程度,可由多方位层析信号的方差来识别孔洞损伤的各向异性特征。

Based on continuum damage mechanics, the deformation-damage process of a multilayer target impacted straight by a bullet is simulated with 3-dimensional numerical analysis and the basic equations are derived. The composite material of the target is anisotropic and the structure of the target is heterogeneous. The micro-damage induced by the impact is also anisotropic and results in nonlinearity of the material. The local large deformation of the target due to impact. however, causes geometric nonlinearity. The...

Based on continuum damage mechanics, the deformation-damage process of a multilayer target impacted straight by a bullet is simulated with 3-dimensional numerical analysis and the basic equations are derived. The composite material of the target is anisotropic and the structure of the target is heterogeneous. The micro-damage induced by the impact is also anisotropic and results in nonlinearity of the material. The local large deformation of the target due to impact. however, causes geometric nonlinearity. The micro-damage, including the cracking of matrix and fiber within the lamina and the interlayer fracture, is dealt with by nodal division in the finite element analysis. The steel bullet is assumed to be linearly elastic and its damage is neglected. A calculating example is given and the typical strain-Wave transmission in the target is explained.

基于连续损伤力学,对于子弹冲击多层板靶的变形─损伤过程以三维数值模拟作了理论研讨,给出了必要的基本方程.板靶具有材料各向异性和结构非均匀性;冲击引起的微损伤是各向异性的,造成材料的非线性;冲击造成的局部大变形,构成几何非线性.给出了计算实例;计算结果说明了典型的应变波在靶中的传播.

Based on continuum damage mechanics, the deformation and damage process of composite laminates impacted by projectile were studied theoretically. The basic equations for this simulation were then derived. The composites are of anisotropy and nonhomogeneity, the micro damage induced by impact is anisotropic and results in nonlinearity of materials, and the local large deformations of target construct geometrical nonlinearity. The macro damages which include cracking of matrix, fibers fracture within lamina...

Based on continuum damage mechanics, the deformation and damage process of composite laminates impacted by projectile were studied theoretically. The basic equations for this simulation were then derived. The composites are of anisotropy and nonhomogeneity, the micro damage induced by impact is anisotropic and results in nonlinearity of materials, and the local large deformations of target construct geometrical nonlinearity. The macro damages which include cracking of matrix, fibers fracture within lamina and interface debonded as well are treated by the nodal division for finite element analysis. The projectile made of steel is assumed to be linear elastic and its damage in the impact process is not taken into account. The theory used in this paper can simulate the process of damage and deformation of composite laminates impacted by projectile.

基于连续损伤力学,对弹丸冲击复合材料多层板靶的变形-损伤过程给出了必要的基本方程,进行了三维有限元分析。将靶板处理为具有材料各向异性和结构非均匀性;冲击引起的微损伤是各向异性的,造成材料的非线性;冲击造成的局部大变形,构成几何非线性。宏观损伤(包括层内基体开裂、纤维断裂和层间分层)在有限元分析中用节点分裂法处理。钢质弹丸假设是线弹性的,不考虑它在冲击过程中的损伤。计算结果表明,采用本文中提出的方法,能较好地模拟复合材料层合板受弹丸冲击时的损伤、变形过程

 
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