Measurement of Strain Distribution of Composite Materials by Electron Moiré Method

Reciprocal Theorem for Displacements In Inelastic Bodies

Journal of Composite Materials ◽

10.1177/002199836700100204 ◽

1967 ◽

Vol 1 (2) ◽

pp. 144-151 ◽

Cited By ~ 5

Author(s):

T.H. Lin

Keyword(s):

Composite Materials ◽

Strain Distribution ◽

Elastic Strain ◽

Body Force ◽

Inelastic Strain ◽

The Body ◽

Reciprocal Theorem ◽

Plastic Potential ◽

The Reciprocal Theorem ◽

Solid Bodies

Using the analogy between the inelastic strain gradient and applied body force, the reciprocal theorem for displacement in inelastic bodies is derived. The application of this theorem to find the deflection or slope at a particular point due to given in elastic strain distribution in the body is given. Using this theorem, the coincidence of yield surfaces with plastic potential is derived. This theorem may be applied to solid bodies of both homogeneous and composite materials.

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Optimization Design for the Interface Modulus of Csf/Al Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.575-578.859 ◽

2008 ◽

Vol 575-578 ◽

pp. 859-863

Author(s):

Guo Xing Tang ◽

G.A. Zhang ◽

H.B. Wu ◽

Wen Tong Tian ◽

Hun Guo

Keyword(s):

Composite Materials ◽

Strain Distribution ◽

Optimization Design ◽

Fiber Strength ◽

Short Fiber ◽

Stress Strain ◽

Element Analysis ◽

The Matrix ◽

Bond Interface ◽

Base Composite

Short fiber reinforced Al-base composite can be manufactured various parts by plastic working. Elastic modulus has a large influence on the parts among the composite system. In the paper, model of finite-element analysis has been established. The influences of interface modulus on the law of stress-strain distribution, the strength and the modulus for the composite materials have been simulated by ANSYS in the condition of strong-bond, medium-bond and weak-bond interface. The results show that the stress-strain distribution is non-uniform, moreover the force on the fiber is greatly higher than that of the matrix within the composite materials; the strength of the composite materials is improved with the increasing of the interface modulus, but the increasing will be limited by the strength of fiber. Therefore the relation of ideal interface modulus with the fiber strength has been proposed. 70GPa of the interface modulus is thought to be better for M40 short fiber.

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Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052742 ◽

1974 ◽

Vol 32 ◽

pp. 546-547

Author(s):

R.R. Russell

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Composite Materials ◽

Great Difficulty ◽

Ion Milling ◽

Transmission Electron ◽

Ion Damage ◽

Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

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Transmission electron microscopy of composite materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107125 ◽

1988 ◽

Vol 46 ◽

pp. 1012-1015

Author(s):

K.P.D. Lagerlof

Keyword(s):

Composite Materials ◽

Physical Properties ◽

Structural Defects ◽

Structural Composites ◽

Multiphase Materials ◽

Structural Reinforcement ◽

Transmission Electron ◽

Reinforced Fiber ◽

Particulate Reinforced Composites ◽

Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

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