Results 21 to 30 of about 1,354,072 (296)

Dynamic Crack Initiation Toughness of Shale under Impact Loading

Energies, 2019
The impact loading of a notched semi-circular bend (NSCB) specimen of outcrop shale in Changning Sichuan was carried out using a split Hopkinson pressure bar (SHPB) to study the effect of shale bedding on the dynamic crack initiation toughness.
Guoliang Yang, Xuguang Li, Jingjiu Bi, Shuaijie Cheng   +3 more
doaj   +1 more source

Application of Paris' law under variable loading [PDF]

FME Transactions, 2022
The most important characteristics for service safety of welded joints are those describing crack initiation and growth caused by variable loading. Crack initiation and growth caused by variable loading is the subject of numerous investigations.
Bulatović Srđan M., Aleksić Vujadin D., Milović Ljubica P., Zečević Bojana V.   +3 more
doaj   +1 more source

A Combined Numerical–Analytical Study for Notched Fatigue Crack Initiation Assessment in TRIP Steel: A Local Strain and a Fracture Mechanics Approach

Metals, 2023
In the fatigue design of metallic components using the safe-life approach, fatigue crack initiation as a development of slip systems at the nanoscale, followed by microstructurally short crack growth, is critical for the onset of structural failure.
Peter I. Christodoulou, Alexis T. Kermanidis   +1 more
doaj   +1 more source

Investigation on the Crack Initiation of V-Shaped Notch Tip in Precision Cropping

Advances in Materials Science and Engineering, 2014
The crack initiation of V-shaped notch tip has a very important influence on the cross-section quality and the cropping time for every segment of metal bar in course of low stress precision cropping.
Lijun Zhang, Shengdun Zhao, Zhenwei Wang
doaj   +1 more source

Effect of high temperature on crack initiation of super austenitic stainless steel 654SMO in very high cycle fatigue

Materials & Design, 2020
Working service of structural materials at elevated temperatures generally leads to a significant decrease in their fatigue performance, thereby threatening the safety and reliability of engineering structures.
Xue Li, Ruofan Zhang, Xiangyu Wang, Yongjie Liu, Chong Wang, Hong Zhang, Lang Li, Chao He, Qingyuan Wang   +8 more
doaj   +1 more source

Experimental investigation on crack initiation and damage stresses of deep granite under triaxial compression using acoustic methods

Journal of Rock Mechanics and Geotechnical Engineering, 2023
Crack initiation stress and crack damage stress are two critical indices for assessing the fracture strength of rock mass. However, understanding the stress characteristics of crack initiation and damage under triaxial compression remains still immature.
Xiaoling Zhao, Tao Zhou, Tianqi Zhai, Yang Ju, Jianbo Zhu   +4 more
doaj   +1 more source

SIMULATION OF FATIGUE CRACK INITIATION LIFE OF TC4 TITANIUM ALLOY BASED ON ITS MESOSCOPIC PROPERTIES

Jixie qiangdu, 2021
This paper presents that the prediction model of fatigue crack initiation life of TC4 titanium alloy,and the feasibility of the model in predicting the fatigue crack initiation life of TC4 titanium alloy is verified by experiments.
JIANG Ze, XU XiWu, GUO ShuXiang, WU Bin, QI Yan   +4 more
doaj  

Observation of the initial process of internal fracture in very high cycle fatigue in Ti-6Al-4V by synchrotron radiation μCT imaging

Nihon Kikai Gakkai ronbunshu, 2017
The initiation and growth of internal small fatigue cracks with around ten or several dozen μm in Ti-6Al-4V were nondestructively examined by using synchrotron radiation μCT at the large synchrotron radiation facility SPring-8.
Fumiyoshi YOSHINAKA, Takashi NAKAMURA, Kazuaki TAKAKU, Daiki SHIOZAWA, Yoshikazu NAKAI, Kentaro UESUGI   +5 more
doaj   +1 more source

On the mechanism of fatigue and dwell-fatigue crack initiation in Ti-6Al-4V

, 2020
In the present study, the mechanism of fatigue and dwell-fatigue crack initiation was investigated in Ti-6Al-4V with a bi-modal microstructure. While substantial dwell-fatigue life debit was evidenced, microstructural configurations associated with crack
C. Lavogiez, S. Hémery, P. Villechaise
semanticscholar   +1 more source

Effect of Notches on Fatigue Crack Initiation and Early Propagation Behaviors of a Ni-Based Superalloy at Elevated Temperatures

Metals
The role of notch stress and surface defects on fatigue crack initiation and small-crack propagation behavior has been investigated using groove simulation specimens.
Zuopeng Zhao, Xuteng Hu, Zhiwei Guo
doaj   +1 more source