Analysis of Effective Elastic Modulus and Interfacial Bond Strength of Aluminum Borate Whisker Reinforced Mg Matrix Composite by Using Three Dimensional Unit Cell Model

2010 ◽  
Vol 48 (5) ◽  
pp. 469-475
Author(s):  
Jae Hyoung Son ◽  
Wook Jin Lee ◽  
Yong Ha Park ◽  
Yong Ho Park ◽  
Ik Min Park
Keyword(s):  
Elastic Modulus ◽  
Bond Strength ◽  
Cell Model ◽  
Three Dimensional ◽  
Effective Elastic Modulus ◽  
Unit Cell Model ◽  
Aluminum Borate ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Dimensional Unit

The Effect of Interphase on the Elastic Modulus of Polymer Based Nanocomposites

2006 ◽  
Vol 312 ◽  
pp. 199-204 ◽  
Author(s):  
Saeed Saber-Samandari ◽  
Akbar Afaghi Khatibi
Keyword(s):  
Elastic Modulus ◽  
Mathematical Models ◽  
Cell Model ◽  
Three Dimensional ◽  
Unit Cell ◽  
Unit Cell Model ◽  
Average Value ◽  
Dimensional Unit

The elastic modulus of interphase in polymer based nanocomposites is investigated. A new three-dimensional unit cell model has been developed for modeling three constituent phases including particle, interphase and matrix. The elastic modulus of the interphase as a function of radius is then evaluated with the help of mathematical models. The average value of interphase elastic modulus is defined and the effect of interphase thickness and particle and matrix elastic modulus on interphase is investigated.

Prediction of equibiaxial loading stress in collagen-based extracellular matrix using a three-dimensional unit cell model

2013 ◽  
Vol 9 (3) ◽  
pp. 5544-5553 ◽  
Author(s):  
Monica E. Susilo ◽  
Brett J. Bell ◽  
Blayne A. Roeder ◽  
Sherry L. Voytik-Harbin ◽  
Klod Kokini ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Cell Model ◽  
Three Dimensional ◽  
Unit Cell ◽  
Unit Cell Model ◽  
Dimensional Unit

A Three-Dimensional Unit Cell Model With Application Toward Particulate Composites

1995 ◽  
Vol 62 (1) ◽  
pp. 136-140 ◽  
Author(s):  
H. A. Wienecke ◽  
J. R. Brockenbrough ◽  
A. D. Romanko
Keyword(s):  
Cell Model ◽  
Three Dimensional ◽  
Unit Cube ◽  
Unit Cell ◽  
Particulate Composites ◽  
Unit Cell Model ◽  
Two Phase ◽  
Element Discretization ◽  
Cubic Symmetry ◽  
Dimensional Unit

A formulation of a fully three-dimensional unit cell model is presented for uniform general deformation at a point in a composite material. The unit cell model is constructed as a finite element discretization of the unit cube. General displacement periodicity boundary conditions are prescribed such that the cell may be considered as a representative volume element of material. As a particular application of the model, the problem of determining the least anisotropic periodic model of a particulate composite is considered, and comparisons are made with bounds for elastic two-phase composites possessing cubic symmetry.

A Three Dimensional Unit Cell Model for the Analysis of Thermal Residual Stresses in Polymer Composites Reinforced with Wavy Carbon Nanotubes

MRS Advances ◽  
2019 ◽  
Vol 5 (33-34) ◽  
pp. 1739-1748 ◽  
Author(s):  
Y. Zhang ◽  
A. Johnston ◽  
A. Yousefpour ◽  
J. Guan ◽  
B. Simard ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Residual Stresses ◽  
Cell Model ◽  
Three Dimensional ◽  
Numerical Approach ◽  
Unit Cell ◽  
Unit Cell Model ◽  
Thermal Residual Stresses ◽  
Dimensional Unit ◽  
Residual Stresses And Strains

ABSTRACTThis paper presents a numerical approach to predict the thermal residual stresses in polymer nanocomposites reinforced with a periodic array of wavy carbon nanotubes. A three dimensional unit cell model is established to accurately account for the waviness of the nanotube. Periodic boundary conditions are determined for the unit cell with a pair of curved surfaces. Appropriate methods to evaluate the macroscopic stresses and strains are also determined for the unit cell model in which the interior pores of the nanotubes are explicitly included. It is demonstrated that the macroscopic behavior of the nanocomposites is orthotropic due to the symmetries manifested. By employing material properties of the two constituents, the thermal residual stresses and strains induced by high temperature curing and cooling-down are predicted for an epoxy/wavy-nanotube composite. It is also demonstrated that the curing process tends to increase the waviness of the nanotube and the waviness has a significant influence on the distribution of the microscopic residual stresses.

Experimental Research on Interfacial Bond Performance in Rock Anchor with High-Performance Grouting Medium

2012 ◽  
Vol 517 ◽  
pp. 932-938 ◽  
Author(s):  
Zhi Fang ◽  
Hong Qiao Zhang
Keyword(s):  
Rock Mass ◽  
Bond Strength ◽  
High Performance ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Bond Performance ◽  
Pull Out ◽  
Steel Bar ◽  
Reactive Powder ◽  
Ground Anchor

There exist the problems such as low bond strength and bad durability in the ordinary grouting slurry of the ground anchor system at present. The high-performance grouting mediums RPC (Reactive Powder Concrete) and DSP (Densified Systems containing homogeneously arranged ultrafine Particles) would become the potential replacement of grouting medium in ground anchor resulting from their high compressive strength, durability and toughness. Based on a series of pull-out tests on ground anchors with different high-performance grouting medium of RPC and DSP , different bond length in the construction field, the bond performance on the interfaces between anchor bolt (deformed steel bar) and grouted medium as well as between grouted medium and rock mass was studied. The results indicate that the interfacial bond strength between RPC or DSP and deformed steel bolt ranges within 23-31Mpa, far greater than that (about 2-3MPa) between the ordinary cementitious grout and deformed steel bar. Even though the interfacial bond strength between the grouted medium and rock mass of limestone was not obtained in the test since the failure mode was pull-out of those steel bar rather than the interface shear failure between grouted medium and rock mass, the bond stress on the interface reached 6.2-8.38 MPa, also far greater than the bond strength (about 0.1-3MPa) between the ordinary cementitious slurry and rocks.

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