共查询到20条相似文献,搜索用时 15 毫秒
1.
Deformation of Particulate Composite with Physically Nonlinear Inclusions and Microdamageable Matrix
The structural theory of short-term damage is generalized to the case where the matrix of a particulate composite has microdamages and the inclusions deform nonlinearly. The basis for this generalization is the stochastic elasticity equations of a porous-matrix particle-reinforced composite. Microvolumes of the matrix meet the Huber-Mises failure criterion. A balance equation for damaged microvolumes is derived. The balance equation and the equations relating macrostresses and macrostrains of a particulate composite with porous matrix and physically nonlinear inclusions constitute a closed-form system. The system describes the coupled processes of physically nonlinear deformation and microdamage. Algorithms for calculating the microdamage-macrostrain relationship and plotting deformation diagrams are proposed. Uniaxial tension curves are plotted for the case where the material of inclusions is linearly hardening__________Translated from Prikladnaya Mekhanika, Vol. 41, No. 2, pp. 3–11, February 2005. 相似文献
2.
The structural theory of short-term microdamage is generalized to a laminated composite with a microdamageable matrix and
physically nonlinear reinforcement. The basis for the generalization is the stochastic elasticity equations of a laminated
composite with a porous matrix. Microvolumes in the matrix material meet the Huber-Mises failure criterion. The damaged-microvolume
balance equation for the matrix is derived. This equation and the equations relating macrostresses and macrostrains of a laminated
composite with porous matrix and physically nonlinear reinforcement constitute a closed-form system of equations. This system
describes the coupled processes of physically nonlinear deformation and microdamage occurring in different composite components.
Algorithms for computing the microdamage-macrostrain relationships and deformation diagrams are developed. Uniaxial tension
curves are plotted for a laminated composite with linearly hardening reinforcement
__________
Translated from Prikladnaya Mekhanika, Vol. 41, No. 11, pp. 47–56, November 2005. 相似文献
3.
The structural theory of short-term microdamage is generalized to a fibrous composite with a microdamageable matrix and physically
nonlinear fibers. The basis for the generalization is the stochastic elasticity equations of a fibrous composite with a porous
matrix. Microvolumes in the matrix material meet the Huber-Mises failure criterion. The damaged-microvolume balance equation
for the matrix is derived. This equation and the equations relating macrostresses and macrostrains of a fibrous composite
with porous matrix and physically nonlinear fibers constitute a closed-form system of equations. This system describes the
coupled processes of physically nonlinear deformation and microdamage occurring in different components of the composite.
Algorithms for computing the microdamage-macrostrain and macrostress-macrostrain relationships are developed. Uniaxial tension
curves are plotted for a fibrous composite with linearly hardening fibers
__________
Translated from Prikladnaya Mekhanika, Vol. 42, No. 1, pp. 38–47, January 2006. 相似文献
4.
The problem of bifurcation instability of shells of revolution made of particulate composites with physically nonlinear matrix
and damageable inclusions is formulated and solved
__________
Translated from Prikladnaya Mekhanika, Vol. 44, No. 6, pp. 70–80, June 2008. 相似文献
5.
The structural theory of short-term damage is generalized to the case where the undamaged components of a particulate composite
deform nonlinearly under loads that induce a compound stress state. The basis for this generalization is the stochastic elasticity
equations for a particulate composite with porous components whose skeletons deform nonlinearly. Damage in a microvolume of
the material is assumed to occur in accordance with the Huber-Mises failure criterion. Balance equations for damaged microvolume
are derived for the physically nonlinear materials of the components. Together with the macrostress-macrostrain relationship
for a particulate composite with porous nonlinear components, they constitute a closed-form system of equations. This system
describes the coupled processes of physically nonlinear deformation and microdamage. Algorithms for calculating the microdamage-macrostrain
relationship and plotting stress-strain curves are proposed. Such curves are plotted for the case where the composite is subjected
to a combination of normal and tangential loads, and microdamages occur in the linearly hardened matrix and do not in the
linearly elastic inclusions. The stress-strain curves are examined depending on the volume fraction of inclusions and presence
of tangential stresses
__________
Translated from Prikladnaya Mekhanika, Vol. 42, No. 12, pp. 48–57, December, 2006. 相似文献
6.
高尺寸稳定性铝基复合材料研究新进展 总被引:5,自引:0,他引:5
本文在讨论材料尺寸稳定性基本原理的基础上,对几种铝基复合材料的尺寸稳定性特性进行了综合分析对比,表明:亚微米铝基复合材料具有很高的尺寸稳定性性能,符合组织稳定、相稳定、应力稳定、晶粒细化等基本要求,是目前惯性器件较理想的选材。 相似文献
7.
The structural theory of short-term damage is generalized to the case where the undamaged components of a granular composite deform nonlinearly. The basis for this generalization is the stochastic elasticity equations for a granular composite with porous components whose skeletons deform nonlinearly. Microvolumes of the composite components meet the Huber–Mises failure criterion. Damaged microvolume balance equations are derived for the physically nonlinear materials of the components. Together with the equations relating macrostresses and macrostrains of a granular composite with porous nonlinear components, they constitute a closed-form system. The system describes the coupled processes of physically nonlinear deformation and microdamage. Algorithms for calculating the microdamage–macrostrain relationship and plotting deformation diagrams are proposed. Uniaxial tension curves are plotted for the case where microdamages occur in the linearly hardened matrix and do not in the inclusions, which are linearly elastic 相似文献
8.
The bifurcation instability problem for rectangular plates made of particulate composites with nonlinear elastic matrix and
damaged inclusions is formulated and solved
__________
Translated from Prikladnaya Mekhanika, Vol. 43, No. 7, pp. 79–89, July 2007. 相似文献
9.
The bifurcation instability problem for cylindrical shells made of particulate composites with nonlinear elastic inclusions
and damageable matrix is formulated and solved
__________
Translated from Prikladnaya Mekhanika, Vol. 43, No. 10, pp. 68–79, October 2007. 相似文献
10.
The bifurcation instability problem for cylindrical shells made of particulate composites with nonlinear elastic matrix and
damaged inclusions is formulated and solved
__________
Translated from Prikladnaya Mekhanika, Vol. 43, No. 8, pp. 80–91, August 2007. 相似文献
11.
I. Yu. Tsvelodub 《Journal of Applied Mechanics and Technical Physics》2003,44(5):716-720
The following two types of physically nonlinear inhomogeneous media are considered: linear-elastic plane with nonlinear-elastic elliptic inclusions and linear-viscous plane with elliptic inclusions from a material that possesses nonlinear-creep properties. The problem is to determine infinitely distant loads that produce a required value of the principal shear stress (in the first case) or principal shear-strain rate (in the second case) for two arbitrary inclusions. Conditions for the existence of solutions of these problems for incompressible media under plane strains are obtained. 相似文献
12.
The bifurcation instability problem for shells of revolution made of particulate composites with nonlinear elastic inclusions
and damageable matrix is formulated and solved
__________
Translated from Prikladnaya Mekhanika, Vol. 43, No. 11, pp. 55–65, November 2007. 相似文献
13.
A structural theory of short-term microdamage is proposed for a fibrous composite with physically nonlinear matrix and microdamaged
reinforcement. The theory is based on the stochastic elasticity equations of a fibrous composite with porous fibers. Microvolumes
of the fiber material are damaged in accordance with the Huber-Mises failure criterion. A balance equation for damaged microvolumes
in the reinforcement is derived. This equation together with the equations relating macrostresses and macrostrains of a fibrous
composite with porous reinforcement and physically nonlinear matrix constitute a closed-form system. This system describes
the coupled processes of physically nonlinear deformation and microdamage that occur in different components of the composite.
Algorithms are proposed for computing the dependences of microdamage on macrostrains and macrostresses on macrostrains. Uniaxial
tension curves are plotted for a fibrous composite with a linearly hardening matrix
__________
Translated from Prikladnaya Mekhanika, Vol. 42, No. 2, pp. 3–13, February 2006. 相似文献
14.
The structural theory of short-term damage is generalized to the case where the undamaged isotropic matrix of a fibrous composite with transversely isotropic fibers deforms nonlinearly, with microdamages occurring only in the matrix. The basis for this generalization is the stochastic elasticity equations for a fibrous composite with porous matrix whose skeleton deforms nonlinearly. Microvolumes of the matrix meet the Huber-Mises failure criterion. The damaged microvolume balance equation is derived for the physically nonlinear material of the matrix based on the properties of the ultimate microstrength distribution. Together with the equations relating macrostresses and macrostrains of the fibrous composite with porous nonlinear matrix, they constitute a closed-form system. This system describes the coupled processes of physically nonlinear deformation and microdamage. Algorithms for calculating the dependences of macrostresses and microdamages on macrostrains are proposed. Uniaxial tension curves are plotted for a fibrous composite with linearly hardening matrix.Translated from Prikladnaya Mekhanika, Vol. 40, No. 10, pp. 88–97, October 2004. 相似文献
15.
A structural theory of short-term microdamage is proposed for a two-component laminated composite with microdamageable reinforcement
and physically nonlinear matrix. The basis of the theory is the stochastic elasticity equations of a laminated composite with
a porous reinforcement. Microvolumes in the reinforcement material meet the Huber-Mises failure criterion. The damaged-microvolume
balance equation for the reinforcement is derived. This equation and the equations relating macrostresses and macrostrains
of a laminated composite with porous reinforcement and physically nonlinear matrix constitute a closed-form system of equations.
This system describes the coupled processes of physically nonlinear deformation and microdamage occurring in different composite
components. Algorithms for computing the microdamage-macrostrain relationships and deformation diagrams are developed. Uniaxial
tension curves are plotted for a laminated composite with linearly hardening matrix
__________
Translated from Prikladnaya Mekhanika, Vol. 41, No. 12, pp. 3–12, December 2005. 相似文献
16.
M. Yu. Kashtalyan 《International Applied Mechanics》2005,41(1):24-31
The deformation of cross-ply ceramic-matrix composite laminates under biaxial loading is studied theoretically. Experimentally, microscopic damage evolution in cross-ply ceramic-matrix composite laminates has not been well characterized yet, mainly due to the difficulties involved in testing of anisotropic plates under biaxial loading. It is assumed that the initial damage mechanism observed in ceramic-matrix composite laminates is the formation of tunneling macrocracks both in the 90°- and 0°-plies. The paper addresses the stiffness-deterioration behavior of cross-ply ceramic-matrix laminates with transverse and longitudinal macrocracks. The analysis is based on the equivalent-constraint model of a damaged laminate. Numerical results for SiC/CAS cross-ply laminates of various lay-ups are presented and discussed__________Translated from Prikladnaya Mekhanika, Vol. 41, No. 1, pp. 37–46, January 2005. 相似文献
17.
FuYiming LiPing'en ZhengYufang 《Acta Mechanica Solida Sinica》2004,17(3):230-238
I. INTRODUCTION The composite material and the composite structure are liable to generate damage during manufactureand under load, which will lead to a decrease of the material and structure’s mechanical properties.It is accepted that there exist four… 相似文献
18.
The structural theory of short-term damage is generalized to the case where the undamaged components of an N-component laminar composite deform nonlinearly. The basis for this generalization is the stochastic elasticity equations for an N-component laminar composite with porous components whose skeleton deforms nonlinearly. Microvolumes of the composite components meet the Huber–Mises failure criterion. Damaged microvolume balance equations are derived for the physically nonlinear materials of the composite components. Together with the equations relating macrostresses and macrostrains of the laminar composite with porous nonlinear components, they constitute a closed-form system. This system describes the coupled processes of physically nonlinear deformation and microdamage. For a two-component laminar composite, algorithms for calculating the microdamage–macrostrain relationship and plotting deformation curves are proposed. Uniaxial tension curves are plotted for the case where microdamages occur in the linearly hardening component and do not in the linearly elastic component 相似文献
19.
20.
碳纤维铜基复合材料的摩擦学性能研究 总被引:8,自引:3,他引:8
本文对碳纤维铜基复合材料与钢组成的摩擦副进行了摩擦学性能研究,在不同的滑动速度和不同的载荷条件下,得出了摩擦系数和比磨损率的试验结果,并且对碳膜的形成和破裂,摩擦系数的变化过程,以及出现的磨损状态等进行了分析和讨论。 相似文献