Damage modelling in geotechnics: Micromechanical approach

2010 ◽  
pp. 169-172
Keyword(s):  
Damage Modelling ◽  
Micromechanical Approach

Modeling of Thin Sheet Blanking with a Micromechanical Approach Application of the MTS Model

2002 ◽  
Vol 5 (2-3-4) ◽  
pp. 423-432 ◽  
Author(s):  
Christophe Poizat ◽  
Christophe Husson ◽  
Said Ahzi ◽  
Nadia Bahlouli ◽  
Laurent Merle
Keyword(s):  
Thin Sheet ◽  
Micromechanical Approach

Pertinence of the Grain Size on the Mechanical Strength of Polycrystalline Metals

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
N. A. Zontsika ◽  
A. Abdul-Latif ◽  
S. Ramtani
Keyword(s):  
Grain Size ◽  
Mechanical Strength ◽  
Kinematic Hardening ◽  
Uniaxial Stress ◽  
Isotropic Hardening ◽  
Ultrafine Grained ◽  
Consistent Model ◽  
Micromechanical Approach ◽  
Interaction Law ◽  
Small Deformations

Motivated by the already developed micromechanical approach (Abdul-Latif et al., 2002, “Elasto-Inelastic Self-Consistent Model for Polycrystals,” ASME J. Appl. Mech., 69(3), pp. 309–316.), a new extension is proposed for describing the mechanical strength of ultrafine-grained (ufg) materials whose grain sizes, d, lie in the approximate range of 100 nm < d < 1000 nm as well as for the nanocrystalline (nc) materials characterized by d≤100 nm. In fact, the dislocation kinematics approach is considered for characterizing these materials where grain boundary is taken into account by a thermal diffusion concept. The used model deals with a soft nonincremental inclusion/matrix interaction law. The overall kinematic hardening effect is described naturally by the interaction law. Within the framework of small deformations hypothesis, the elastic part, assumed to be uniform and isotropic, is evaluated at the granular level. The heterogeneous inelastic part of deformation is locally determined. In addition, the intragranular isotropic hardening is modeled based on the interaction between the activated slip systems within the same grain. Affected by the grain size, the mechanical behavior of the ufg as well as the nc materials is fairly well described. This development is validated through several uniaxial stress–strain experimental results of copper and nickel.

Critical surfaces for adobe masonry: Micromechanical approach

2014 ◽  
Vol 56 ◽  
pp. 790-796 ◽  
Author(s):  
Andrea Caporale ◽  
Fulvio Parisi ◽  
Domenico Asprone ◽  
Raimondo Luciano ◽  
Andrea Prota
Keyword(s):  
Micromechanical Approach ◽  
Adobe Masonry

A Method to Evaluate the Elastic Properties of Ceramics-Enhanced Composites Undertaking Interfacial Delamination

2007 ◽  
Vol 336-338 ◽  
pp. 2513-2516
Author(s):  
Hua Jian Chang ◽  
Shu Wen Zhan
Keyword(s):  
Composite Materials ◽  
Present Method ◽  
Present Model ◽  
Constitutive Law ◽  
Layer Model ◽  
Interfacial Delamination ◽  
Equivalent Inclusion Method ◽  
Equivalent Inclusion ◽  
Micromechanical Approach ◽  
Properties Of Composites

A micromechanical approach is developed to investigate the behavior of composite materials, which undergo interfacial delamination. The main objective of this approach is to build a bridge between the intricate theories and the engineering applications. On the basis of the spring-layer model, which is useful to treat the interfacial debonding and sliding, the present paper proposes a convenient method to assess the effects of delamination on the overall properties of composites. By applying the Equivalent Inclusion Method (EIM), two fundamental tensors are derived in the present model, the modified Eshelby tensor, and the compliance tensor (or stiffness tensor) of the weakened inclusions. Both of them are the fundamental tensors for constructing the overall constitutive law of composite materials. By simply substituting these tensors into an existing constitutive model, for instance, the Mori-Tanaka model, one can easily evaluate the effects of interfacial delamination on the overall properties of composite materials. Therefore, the present method offers a pretty convenient tool. Some numerical results are carried out in order to demonstrate the performance of this model.

scholarly journals Modeling Cyclic Behavior of Clay by Micromechanical Approach

2013 ◽  
Vol 139 (9) ◽  
pp. 1305-1309 ◽  
Author(s):  
Zhen-Yu Yin ◽  
Qiang Xu ◽  
Ching S. Chang
Keyword(s):  
Cyclic Behavior ◽  
Micromechanical Approach

Enhanced fracture energy and effects of temperature at spalling in ceramics: continuum damage modelling

2000 ◽  
Vol 70 (1-3) ◽  
pp. 145-157 ◽  
Author(s):  
J. Najar ◽  
V. V. Silberschmidt ◽  
M. Müller-Bechtel
Keyword(s):  
Fracture Energy ◽  
Continuum Damage ◽  
Damage Modelling ◽  
Effects Of Temperature

A micromechanical approach of nonlocal modeling for media with periodic microstructures

2008 ◽  
Vol 35 (1-2) ◽  
pp. 126-133 ◽  
Author(s):  
Xi Yuan ◽  
Yoshihiro Tomita ◽  
Tomoaki Andou
Keyword(s):  
Micromechanical Approach ◽  
Periodic Microstructures
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