Results 71 to 80 of about 49,441 (301)

A new hardening law for strain gradient plasticity

, 2000
A new hardening law of the strain gradient theory is proposed in this paper, which retains the essential structure of the incremental version of conventional J(2) deformation theory and obeys thermodynamic restrictions.
Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China., 陈少华, 王自强   +2 more
core   +1 more source

Static and Dynamic Analysis of Strain Gradient Planar Trusses

Buildings
This paper examines the static and dynamic responses of strain gradient planar trusses. Classical elasticity (CE) theory lacks a material microstructural length parameter in its governing equations, making it insufficient to capture size-dependent ...
George C. Tsiatas, Aristotelis E. Charalampakis, Antonios E. Giannakopoulos, Panos Tsopelas   +3 more
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Wedge and Twist Disclinations in Second Strain Gradient Elasticity

, 2007
The aim of this paper is to study disclinations in the framework of a second strain gradient elasticity theory. This second strain gradient elasticity has been proposed based on the first and second gradients of the strain tensor by Lazar et al.
Deng, SC (reprint author), CAS, Inst Mech, State Key LNM, Beijing 100080, Peoples R China., 邓守春, 梁乃刚, 刘金兴   +3 more
core   +1 more source

Constitutive Model of Thin Metal Sheet in Bulging Test Considering Strain Gradient Hardening

Medžiagotyra, 2020
The study of the size effect was one of the most important subjects in the field of micro-forming. To investigate the stress of the thin sheet in the bulging test with the second order size effect, a constitutive equation considering the strain gradient ...
Wei LIANG, Tieping WEI, Xiaoxiang YANG
doaj   +1 more source

Validation of a phenomenological strain-gradient plasticity theory [PDF]

Philosophical Magazine Letters, 2016
AbstractStrain-gradient plasticity theories have been developed to account for the size effect in small-scale plasticity in metals. However, they remain of limited use in engineering, for example in standards for nanoindentation, because of their phenomenological nature.
openaire   +2 more sources

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

A size-dependent functionally graded sinusoidal plate model based on a modified couple stress theory [PDF]

, 2013
A size-dependent model for bending and free vibration of functionally graded plate is developed based on the modified couple stress theory and sinusoidal shear deformation theory.
Thai, Huu-Tai, Vo, Thuc
core   +1 more source

A theory for grain boundaries with strain-gradient plasticity

International Journal of Solids and Structures, 2014
AbstractIn this work, the effect of the material microstructural interface between two materials (i.e., grain boundary in polycrystalls) is adopted into a thermodynamic-based higher order strain gradient plasticity framework. The developed grain boundary flow rule accounts for the energy storage at the grain boundary due to the dislocation pile up as ...
Voyiadjis, George Z., Faghihi, Danial, Zhang, Yida   +2 more
openaire   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source