A review of higher order strain gradient theories of plasticity: Origins, thermodynamics and connections with dislocation mechanics
نویسندگان
چکیده
منابع مشابه
Guidelines for Constructing Strain Gradient Plasticity Theories
Issues related to the construction of continuum theories of strain gradient plasticity which have emerged in recent years are reviewed and brought to bear on the formulation of the most basic theories. Elastic loading gaps which can arise at initial yield or under imposition of non-proportional incremental boundary conditions are documented and analytical methods for dealing with them are illus...
متن کاملA critical assessment of theories of strain gradient plasticity
Theories to extend plasticity to the micron scale have been in existence for over a decade, complemented by a growing body of experimental data. Here, materials and mechanics aspects of two prominent strain gradient theories of plasticity, due to Nix and Gao and to Fleck and Hutchinson, are assessed within the context of simple bending. Differences between the theories are highlighted. The theo...
متن کاملa comparison of teachers and supervisors, with respect to teacher efficacy and reflection
supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...
15 صفحه اولOn the recoverable and dissipative parts of higher order stresses in strain gradient plasticity
The expressions for the free energy in two recent formulations of strain gradient plasticity are extended to include the locked-in strain energy around statistically stored dislocations. This is accomplished by using the strain dependent factor h(ep), which represents the fraction of the rate of plastic work converted into heat in accordance with the latent heat measurements from classical meta...
متن کاملComputational Implementation of Cosserat Based Strain Gradient Plasticity Theories
The current trend in microelectronics towards miniaturization has pushed for an interest in theories intended to explain the behavior of materials at small scales. In particular, an increase in yield strength with decreasing size has been experimentally observed in several materials and under different loading conditions. A class of non-classical continuum mechanics theories has been recently e...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Sadhana
سال: 2015
ISSN: 0256-2499,0973-7677
DOI: 10.1007/s12046-015-0369-3