We consider the elastic theory of single crystals at constant temperature where the free energy density depends on the local concentration of one or more species of particles in such a way that for a given local concentration vector certain lattice geometries (phases) are preferred. Furthermore we consider possible large deformations of the crystal lattice. After deriving the physical model, we...

We report an unusual presentation of a young man with bilateral groin lymph nodal adenolymphoceles and right leg lymphedema as a manifestation of intestinal lymphangiectasia. Chylous reflux was supported by conventional and isotopic lymphography as well as by a total lipid test showing delayed triglyceride absorption 24 hours after ingestion of 60 gm of butter. After excision of groin masses in...

INTRODUCTION Cyclic loading of trabecular bone can lead to fatigue damage and increased risk of fracture in both young and the elderly populations. Fatigue damage processes in trabecular bone include reduction of elastic modulus and accumulation of residual strain. Development of models relating the above effects to the loading variables (stress, strain) is essential for a predictive understand...

Models for hysteresis in continuum mechanics are studied that rely on a time-discretised quasi-static evolution of Young measures akin to a gradient flow. The main feature of this approach is that it allows for local, rather than global minimisation. In particular, the case of a non-coercive elastic energy density of Lennard-Jones type is investigated. The approach is used to describe the forma...

INTRODUCTION Osteogenesis imperfecta (OI) is a genetic disorder that affects the production of type I collagen. A major characteristic of OI is bone fragility, caused in part by bone mass deficiency [1]. Impaired collagen network and abnormal mineralization have also been observed in OI [2,3], suggesting that bone material properties are also compromised. Little data, however, is yet available ...

Dissection of the basilar artery caused sudden coma and death in a 40-year-old man. Atypical clinical features were explained at necropsy. A ventral dissection of the artery within its outer layers resulted in destruction of the pontine tegmentum with sparing of the basis pontis. An unsuspected defect in the internal elastic lamina in the left internal carotid artery was also found suggesting a...

The purpose of the present work is to analyze the modulus of elasticity of graphene (Gr) sheet-reinforced metal matrix nanocomposites (MMNCs) using a homogenized model based on the Mori-Tanaka micromechanics approach. The main focus is to investigate the effects of Gr sheet agglomeration on the MMNC macroscopic elastic modulus. Also, the role of aligning Gr sheets in the mechanical performance ...

A new coefficient of elasticity is proposed that relates to the elastic state of the blood vessels. This measure is proposed as a result of the realization, from personal experience as well as from the international literature, of the difficulty in measuring the thickness of the blood vessels in vivo with acceptable precision. The measurement of E being dependent on the measurement of the thick...

temper rolling or skin pass rolling is one of cold rolling processes composed of a horizontal pass cold rolling mill stand. in this process, the thick strip is subjected to very light reduction (0.5–4%) in thickness in the presence of high friction amplitudes. one of the basic parameters of strip rolling processes is temper rolling force. a new rolling force model has been proposed for temper r...

A new three-dimensional unit cell model has been developed for modeling three constituent phases including inclusion, interphase and matrix. The total elastic modulus of nano-composite is evaluated.  Numerical results are in good agreement with the previous proposed theoretical modeling. Higher matrix and inclusion elastic modulus both can dramatically influence the total elastic modulus.