Multi-parameter crack tip stress state description for estimation of fracture process zone extent in silicate composite WST specimens by Václav Veselý, Jakub Sobek, Lucie Šestáková, Petr Frantík, Stanislav Seitl

Subjects: “…Near-crack tip fields…”
Get full text

Estimation of stepwise crack propagation in ceramic laminates with strong interfaces by L. Náhlík, K. Štegnerová, P. Hutar

“…These stresses can change the crack behaviour. This results to the higher value of so-called apparent fracture toughness, i.e. higher resistance of the ceramic laminate to the crack propagation. …”
Get full text

Estimation of stepwise crack propagation in ceramic laminates with strong interfaces by K. Štegnerová, P. Hutař

“…These stresses can change the crack behaviour. This results to the higher value of so-called apparent fracture toughness, i.e. higher resistance of the ceramic laminate to the crack propagation. …”
Get full text

NONLINEAR FREQUENCY SPECTRAL ANALYSIS OF CRACKED ROTOR BASED ON NOFRF by WU HongXia, HAN Jie, CHEN Hong, QIN DongChen

“…Experimental result shows that the higher order NOFRF is sensitive to the racked rotor with cracks of different depth. …”
Get full text

Research of Feature Extraction and Fault Diagnosis Method of Gear Crack by Li Haiping, Zhao Jianmin, Wu Qingtian, Liu Yang

“…Gears are the most essential parts in rotating machinery,its health status is a significant index to indicate whether machines can run continually or not.So,an automatical and accuracy way for gear early stage fault diagnosis is very important in engineering practice.A novel gear fault diagnosis method based on Euclidean distance technique（EDT）is proposed.The energies of frequency bands are used as the fault feature paramdter in this method.Then,the euclidean distance between the test sample and each health status are calculated through the matrix which consist of the energy values.The class which is the test sample belongs is decided by the minimum distance value.The effectiveness of this methodology is demonstrated using an experiment conducted on a real gearbox.The results show that EDT can diagnose the gear crack fault with a higher accuracy rate than other similar method.As the same time,band energy is a sensitive feature parameter in gear crack fault diagnosis and can be used later.…”
Get full text

Acoustic Emission Analysis of the Cracking Behavior in ECC-LWSCC Composites by Yara Zaki, Ahmed Abouhussien, Assem Hassan

“…PVA fibers exhibited higher performance compared to steel fibers at the first crack load, while steel fibers enhanced the beam’s performance at the ultimate load stage. …”
Get full text

Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites by Zhiwu Bie, Xuefeng Liu, Yajie Deng, Xian Shi, Xiaoqiao He

“…Helical carbon nanotubes (HCNTs) with different geometrical properties were constructed and incorporated into nanocomposites for the investigation of the anti-crack mechanism. The interfacial mechanical properties of the nanocomposites reinforced with straight carbon nanotubes and various types of HCNTs were investigated through the pullout of HCNTs in the crack propagation using molecular dynamics (MD). …”
Get full text

Mode I stress intensity factor with various crack types by Ehab Samir Mohamed Mohamed Soliman

“…Besides, in case of high crack lengths, it is found that, FEA results of mode I SIF in case of (CCP) are higher than those of in case of (DECP). …”
Get full text

A novel algorithm for crack path identification based on infrared images by Luca Romanin, Alexei Vinogradov, Filippo Berto, Paolo Ferro

“…We first test some commonly available infrared image filtering techniques, and then we introduce a new robust algorithm to identify the position of the dynamic crack.  …”
Get full text

A novel algorithm for crack path identification based on infrared images by Luca Romanin, Alexei Vinogradov, Filippo Berto, Paolo Ferro

“…We first test some commonly available infrared image filtering techniques, and then we introduce a new robust algorithm to identify the position of the dynamic crack. …”
Get full text

Analysis of crack response on structures due to blasting and non-blasting factors by Vojinović I., Stojadinović S., Svrkota I., Stojanović M., Šabaz D.

“…The strain energy and the stress intensity factor per unit time are much higher under the influence of blasting factors. The strain energy is 9.58 × 1010 times higher, and the stress intensity factor at the crack tip is 309583 times higher due to the dynamic load, observed over a period of 0.033 seconds.…”
Get full text

A research on detecting and recognizing bridge cracks in complex underwater conditions by Wang Tao, Du Tao, Zou Xiaohong, Sun Yiming

“…The method aims to recognize and extract the characteristic parameters of bridge cracks based on images of the cracks obtained through the application of preprocessing technologies, such as graying, graphical enhancements, spatial filtering, gray-level threshold segmentation, etc.. …”
Get full text

A research on detecting and recognizing bridge cracks in complex underwater conditions by Wang Tao, Du Tao, Zou Xiaohong, Sun Yiming

“…The method aims to recognize and extract the characteristic parameters of bridge cracks based on images of the cracks obtained through the application of preprocessing technologies, such as graying, graphical enhancements, spatial filtering, gray-level threshold segmentation, etc.. …”
Get full text

Machine Learning–Enhanced Microseismic Analysis for Evaluating Rock Crack Trajectory by Xinglong Feng, Zeng Chen, Zhengrong Li, Qingtian Zeng, Jing Wang, Ping Wang

“…This study provides valuable insights into the characterization of crack evolution and seepage channels.…”
Get full text

SIMULATION FOR EFFECT OF MULTILAYER INTERPHASE ON TRANSVERSE CRACKING OF CERAMIC MATRIX COMPOSITES by REN JiaCheng, FANG GuangWu, ZHONG Yi, GAO XiGuang, SONG YingDong

“…Moreover,the transverse cracking strain of multilayer interphase is higher than that of monolayer interphase and the location of cracks for the two cases is very different.…”
Get full text

Determination of dissipated Energy in Fatigue Crack Propagation Experiments with Lock-In Thermography by Jurgen Bar, Ralf Urbanek

“…In the crack propagation experiments the maximum value of the D-Mode in the area in front of the crack tip was found to be constant. …”
Get full text

Initial orientation of the fretting fatigue cracks in shrink-fit connection specimens by Ciro Santus

“…The crack initial direction was predicted as the critical plane orientation undergoing the maximum FS stress parameter, for the shallow type I shear cracks. …”
Get full text

Initial orientation of the fretting fatigue cracks in shrink-fit connection specimens by Ciro Santus

“…The crack initial direction was predicted as the critical plane orientation undergoing the maximum Fatemi-Socie (FS) stress parameter, for the shallow type I shear cracks. …”
Get full text

Experimental fracture resistance study for cracked bovine femur bone samples by M.R.M. Aliha, Hussein Ghazi, Farkhondeh Ataei

“…Crack growth and brittle fracture is one of the major failure modes in bone materials and therefore understanding the fracture behavior and affecting parameters on the crack growth resistance of bone is necessary for biomechanics researchers. …”
Get full text

Microstructure dependence of fatigue crack propagation behavior in wrought magnesium alloy by S. Morita, S. Fujiwara, T. Hori, N. Hattori, H. Somekawa, T. Mayama

“…Fracture surfaces of the L-T and L-S specimens showed many steps parallel and perpendicular, respectively, to the macroscopic crack growth direction. The da/dN of the S-T specimen was higher than that of the L-T and L-S specimens in the examined K. …”
Get full text