Results 11 to 20 of about 2,495 (182)

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

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

Cyclic adaptive cohesive zone model to simulate ductile crack propagation in steel structures due to ultra‐low cycle fatigue

Fatigue &Fracture of Engineering Materials &Structures, Volume 46, Issue 5, Page 1821-1836, May 2023., 2023
Abstract Micromechanics‐based continuum damage criteria have previously been developed to simulate the initiation of ductile fracture in structural steels under conditions with large‐scale plasticity where conventional fracture mechanics indices are invalid.
Andy Ziccarelli, Amit Kanvinde, Gregory Deierlein   +2 more
wiley   +1 more source

Crack Growth in Ni-Cr-Mo-V Steel Using ΔCTOD Elastic–Plastic Model

Journal of Marine Science and Engineering, 2022
Many studies have shown that the linear elastic fracture mechanics (LEFM) method based on the stress intensity factor range (ΔK) has limitations that cannot be ignored. Due to neglecting the influence of plastic deformation near the crack tip, LEFM shows
Jingxia Yue, Jiankang Lei, Yordan Garbatov, Ke Yang   +3 more
doaj   +1 more source

Measurement and prediction of CTOD in austenitic stainless steel [PDF]

, 2016
Variation of Crack Tip Opening Displacement (CTOD) test values can have a significant effect on the Engineering Critical Assessment of a structure. This paper examines the development of CTOD with increasing load in an austenitic stainless steel.
Anderson, Burdekin, Colin, Ebara, Gordon, Ipina, Kawabata, Kirk, Ktari, Kumar, Lin, Pook, Pook, Rahimi, Rice, Sarzosa, Shih, Spindler, Spink, Tagawa, Tagawa, Tagawa, Verstraete, Wells, Wu, Zhu   +25 more
core   +2 more sources

Quantitative Visualization Monitoring of Cracks at Shotcrete‐Rock Interface Based on Acoustic Emission

Structural Control and Health Monitoring, Volume 2023, Issue 1, 2023., 2023
To investigate the possibility of quantitative monitoring of the fracture process zone (FPZ) at the shotcrete‐rock interface, the acoustic emission (AE) and digital image correlation (DIC) are used to monitor the three‐point bending test of shotcrete‐rock specimens.
Yuzhu Guo, Xudong Chen, Jin Wu, Tao Ji, Yingjie Ning, Young-Jin Cha   +5 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