Results 11 to 20 of about 289 (156)

Electrostatically Reinforced Double Network Granular Hydrogels. [PDF]

Adv Sci (Weinh)
Electrostatically reinforced double network granular hydrogels (DNGHs) with cartilage‐like fracture energy are introduced. An empirical model predicts the composition‐dependent fracture energy based on dissipation zone size, contact area, and inter‐particle adhesion energy. Thanks to their granular structure and the inter‐particle attraction, the DNGHs
Yuan T, Li C, Kolinski JM, Amstad E.
europepmc   +2 more sources

Strain Field Around Individual Dislocations Controls Failure. [PDF]

Small Methods
By conducting in situ transmission electron microscopy strain mapping during a nanoscale fracture experiment, the dislocation processes taking place at the crack tip in the rather brittle metal chromium is detailed. Moreover, for the first time, the local stress fields of the dislocations shielding the crack is directly measured. Abstract Understanding
Gammer C, Issa I, Minor AM, Ritchie RO, Kiener D.   +4 more
europepmc   +2 more sources

Study of cyclic crack‐tip opening displacement of microstructurally small fatigue crack using digital image correlation

Fatigue &Fracture of Engineering Materials &Structures, Volume 46, Issue 11, Page 4103-4118, November 2023., 2023
Abstract The current work investigates the relationship between the crack growth rate (CGR) and the cyclic crack‐tip opening displacement (ΔCTOD) of microstructurally small fatigue cracks by using high‐resolution digital image correlation (DIC). Load‐controlled fatigue tests were conducted on small‐scale specimens of 18%Cr body‐centered cubic ferritic ...
Ilari Tillikainen, Pasquale Gallo, Pauli Lehto, Heikki Remes   +3 more
wiley   +1 more source

The behavior of anisotropic fatigue short crack initiation and propagation for a directionally solidified superalloy CM247LC at room temperature

Fatigue &Fracture of Engineering Materials &Structures, Volume 46, Issue 10, Page 3912-3926, October 2023., 2023
Abstract The effects of mechanical and microstructural anisotropy on short fatigue crack initiation and propagation behaviors of a directionally solidified superalloy have been studied. An unusual result was found where the fatigue lives of specimens with grains longitudinally aligned along the loading direction fail at lower lifetimes than specimens ...
Yuanguo Tan, Sari Octaviani, Nong Gao, Philippa A. S. Reed   +3 more
wiley   +1 more source

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Materials Research Express, 2023
The cryogenic fracture toughness of the SA645/304L dissimilar weld, produced using continuous wave IPG fiber laser welding with a 0.3 mm beam offset towards the 304L side, and the microstructural effects on the fracture behavior were systematically ...
Fei Zhou, Bingxin Wu, Junhao Ji, Jiaqing Tu, Yaoyao Huang, Chengzhe Wu, Chao Li   +6 more
doaj   +1 more source

Experimental investigations of the critical values of J-integral and crack tip opening displacement (CTOD) of high-density poly-ethylene PE100 elbow

Engineering Failure Analysis, 2022
Abstract The present study aims to characterize the cracking behaviour of high-density poly-ethylene (HDPE) pipe elbow. Experimental studies were performed to determine the mechanical behaviour of HDPE and study the anisotropy of the material. Tension tests were performed on compact tension (CT) specimens to identify the toughness value, expressed by
Dallali, Manel, Azari, Z., Schmitt, C., Capelle, Julien, Hadj-Taïeb, E.   +4 more
openaire   +2 more sources

Dislocation toughening in single‐crystal KNbO3

Journal of the American Ceramic Society, Volume 106, Issue 7, Page 4371-4381, July 2023., 2023
Abstract The growing research interest in dislocation‐tuned functionality in ceramics is evident, with the most recent proofs‐of‐concept for enhanced ferroelectric properties, electrical conductivity, and superconductivity via dislocations. In this work, we focus on dislocation‐tuned mechanical properties and demonstrate that, by engineering high ...
Oliver Preuß, Enrico Bruder, Wenjun Lu, Fangping Zhuo, Christian Minnert, Jiawen Zhang, Jürgen Rödel, Xufei Fang   +7 more
wiley   +1 more source

Investigation of compact tensile and fracture mechanical properties of a duplex stainless steel bimetal composite with the interfacial zone

Journal of Materials Research and Technology, 2022
The interfacial zone formed in the manufacturing process of bimetal or laminated metal composites owes complicated microstructures and properties. This special feature greatly affects the fracture toughness and fatigue strength of metal composites.
Zhou Li, Y.C. Lin, Lu Zhang, Fanghui Jia, Zhengyi Jiang, Sihai Jiao   +5 more
doaj   +1 more source

Novel method for measurement of pipeline materials fracture resistance-examination on selective laser sintered cylindrical specimens [PDF]

Science of Sintering, 2022
This paper presents a part of development of a non-standard method for testing of cylindrical test specimens for measurement of fracture properties of pipeline materials.
Trajković Isaak, Milošević Miloš, Travica Milan, Rakin Marko, Mladenović Goran, Kudrjavceva Ljudmila, Međo Bojan   +6 more
doaj   +1 more source

Fatigue crack growth in notched specimens: a numerical analysis

Fracture and Structural Integrity, 2019
Fatigue crack growth (FCG) is linked to irreversible and non-linear processes happening at the crack tip, which explains different problems observed in the use of da/dN-?K curves. The replacement of ?K by non-linear crack tip parameters, namely the crack
F.V. Antunes, R. Branco, P. Prates, J.D.M. Costa   +3 more
doaj   +3 more sources