A constitutive theory for orthotropic materials is briefly summarized. The constitutive theory allows for anisotropy of the elastic response and anisotropy resulting from both the yield function and the kinematic hardening. The formulation also includes a constitutive theory, thermodynamically consistent, for the plastic spin and the re-orientation of the anisotropy properties towards a more fa...

A method to simulate orthotropic behaviour in thin shell finite elements is proposed. The approach is based on the transformation of shape function derivatives, resulting in a new orthogonal basis aligned to a specified preferred direction for all elements. This transformation is carried out solely in the undeformed state leaving minimal additional impact on the computational effort expended to...

6 Patient-specific high order finite-element (FE) models of human femurs based on quantitative computer tomography (QCT) with inhomogeneous orthotropic and isotropic material properties are addressed. The point-wise orthotropic properties are determined by a micromechanics (MM) based approach in conjunction with experimental observations at the osteon level, and two methods for determining the ...

In this article, we describe the mathematical formulation and numerical implementation of an effective parametrization viscous anisotropy orthorhombic materials produced by crystallographic preferred orientations (CPO or texture), which can be integrated into 3D geodynamic science codes. Here, approach is applied to characterize texture-induced olivine polycrystals, main constituent Earth's upp...

• Determination of masonry equivalent homogeneous material using periodic homogenization. Joint/mortar interface strength modelled by a Mohr-Coulomb yield surface. Thermomechanical finite element modelling blast furnace hearth. Joint openings and lower ramming mix initial density decrease the stress level. Validation model comparison with measurements on real furnace. A hearth is made several r...

This paper investigates the steady-state dynamic radial expansion of a pressurized circular cylindrical cavity in an infinite porous medium modeled with constitutive framework developed by Monchiet et al. (Int J Plast 24:1158–1189, 2008), which considers material to display periodic microstructure spheroidal voids and matrix described orthotropic yield criterion Hill (Proc R Soc Lond Ser A Math...

In this study, we sought to assess the cardiopulmonary functions in three pediatric heart transplant recipients, two of whom are with dilated cardiomyopathy, whereas one is with cyanotic heart disease, in early postoperative period. Cardiopulmonary exercise testing was performed using an incremental cycling at 1 mo after surgery. The results revealed that our study subjects had obvious impairme...

Mandibular condyle plays an important role in the growth and reconstruction of the temporomandibular joint (TMJ). We aimed to obtain orthotropic elastic parameters of the condyle using a continuous-wave ultrasonic technique and to observe the effects of condylar elastic parameters on stress distribution of the TMJ using finite element analysis (FEA). Using the ultrasonic technique, all nine ela...

Abstract Combining with the constitutive relation of orthotropic materials, a fatigue topology optimization model considering materials is established based on Independent Continuous Mapping (ICM) method. It uses minimum structural mass as objective, element life constraint condition, and criterion The filtration function, stiffness function are introduced to identify whether material retained....