Results 51 to 60 of about 544,820 (302)

Analysis of API 5C3 failure prediction formulae for casing and tubing [PDF]

open access: yes, 2012
Due to the increasing demand for oil and gas, coupled with the fact that oil reserves are becoming rather scarce, the petroleum industry is pushed to drill and complete deeper wells. Threaded connections are often the weakest link in this process and are
De Baets, Patrick   +3 more
core   +1 more source

Shear-transformation-zone theory of plastic deformation near the glass transition

open access: yes, 2007
The shear-transformation-zone (STZ) theory of plastic deformation in glass-forming materials is reformulated in light of recent progress in understanding the roles played the effective disorder temperature and entropy flow in nonequilibrium situations. A
F. Spaepen   +3 more
core   +1 more source

Checkpoint blockade and the stem‐like T cell trade‐off

open access: yesMolecular Oncology, EarlyView.
Stem‐like T cells are key to the success of programmed cell death protein 1 (PD1) blockade, as they sustain long‐term anti‐tumor response by continuously generating effector CD8+ T cells. However, how these cells are maintained in cancer is not fully understood. Hor et al.
Julie M. Mazet, Johanna A. Joyce
wiley   +1 more source

Analysis of plastic zones in surrounding rocks around a circular tunnel considering the effect of intermediate principal stress and heterogeneity [PDF]

open access: yesMATEC Web of Conferences, 2019
Based on a modified Mohr-Coulomb criterion with a non-uniform coefficient, a calculation method of plastic zone boundary of surrounding rocks in a circular tunnel in non-uniform stress field is established.
Deng Shuxin   +5 more
doaj   +1 more source

Investigation of High-Temperature Constitutive Behavior of Ti555211 Titanium Alloy Subjected to Plastic Deformation in the Different Phase Regions

open access: yesMetals, 2022
Ti555211 titanium alloy is subjected to plastic deformation in the dual-phase (α + β phase) zone and single-phase (β phase) zone at various deformation temperatures and strain rates.
Yushe Gao   +7 more
doaj   +1 more source

Cohesive zone models in history dependent materials [PDF]

open access: yes, 2013
Copyright @ 2013 ACMECohesive zone model is a well known concept in nonlinear fracture mechanics of elasto-plastic materials. In contrast to that, we discuss a development of the cohesive zone model to linear, but time and history dependent, materials ...
Hakim, L, Mikhailov, SE
core   +1 more source

Microglial dynamics and ferroptosis induction in human iPSC‐derived neuron–astrocyte–microglia tri‐cultures

open access: yesFEBS Open Bio, EarlyView.
A tri‐culture of iPSC‐derived neurons, astrocytes, and microglia treated with ferroptosis inducers as an Induced ferroptosis model was characterized by scRNA‐seq, cell survival, and cytokine release assays. This analysis revealed diverse microglial transcriptomic changes, indicating that the system captures key aspects of the complex cellular ...
Hongmei Lisa Li   +6 more
wiley   +1 more source

The Influence of Rock Thermal Stress on the Morphology and Expansion Pattern of the Plastic Zone in the Surrounding Rock of a Deep-Buried Tunnel under High Geothermal Temperature Conditions

open access: yesApplied Sciences
The extent of the plastic zone is critical in determining the stability and extent of damage to the surrounding rock in tunnels, crucial for designing support structures and thermal insulation layers.
Yucong Yin   +4 more
doaj   +1 more source

Athermal Shear-Transformation-Zone Theory of Amorphous Plastic Deformation I: Basic Principles

open access: yes, 2006
We develop an athermal version of the shear-transformation-zone (STZ) theory of amorphous plasticity in materials where thermal activation of irreversible molecular rearrangements is negligible or nonexistent.
A. Mehta   +4 more
core   +1 more source

The influence of indenter tip rounding on the indentation size effect [PDF]

open access: yes, 2010
A model was developed to interpret the indentation size effect. The model considers the tip wear effect, causing a rounded tip, the plastic zone size and various strengthening contributions, including geometrically necessary dislocations, preexisting ...
Gao, Nong   +2 more
core   +1 more source

Home - About - Disclaimer - Privacy