Fatigue crack growth behavior of marine steel under variable amplitude loading-combining DIC technique and SEM observation

Wang, Changzi; Wang, Shuqing; Xie, Lingjun; Liu, Yaping; Deng, Junlin; He, Wentao

doi:10.1016/j.ijfatigue.2023.107508

Cited by 13 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[18][19][20][21] Scholars have used DIC, especially micro-DIC to investigate the fatigue crack tip deformation and mechanics behaviors under variable amplitude loads. [22][23][24][25] Gong et al 22 investigated the fatigue retardation behavior caused by mixed I-II mode overloads using DIC and scanning electron microscope (SEM) technique. Vasco-Olmo et al 23 studied a quantitative evaluation of the fatigue crack retardation effects under single overloading in an aluminum alloy using the CJP model to calculate the effective stress intensity factor range.…”

Section: Introductionmentioning

confidence: 99%

“…Vasco-Olmo et al 23 studied a quantitative evaluation of the fatigue crack retardation effects under single overloading in an aluminum alloy using the CJP model to calculate the effective stress intensity factor range. Wang et al 24 studied the FCG behavior, strain evolution, and cyclic fatigue characteristics of AH36 marine steel under variable amplitude loads by the DIC method. Liang et al 25 studied the crack growth retardation/acceleration effect caused by overload/underload in the structural steels and the related mechanisms using DIC and other characterization technologies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the multi‐scale online fatigue crack deformation and growth behaviors under overload in Q&P steel

Gao,

Zhan,

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The multi‐scale online fatigue crack deformation and growth behaviors under single overload (SOL) and periodic overload (POL) case in Quenching and Partitioning (Q&P) steel were studied using two micro cameras and sub‐image stitching and matching digital image correlation (DIC) method. Firstly, the microscopic crack tip speckle images and crack images on both sides of the compact tension (CT) specimen during the fatigue crack growth (FCG) process were collected under different overload parameters. Then, the FCG overload retardation, crack tip closing and blunting behaviors, and the crack tip strain distribution and evolution, overload retardation mechanism were analyzed. In addition, the corresponding multi‐scale FCG morphological characteristics and material microstructure under overload case were observed. The results indicate that the overload ratio and interval affect the overload retardation effect of Q&P steel seriously; the overload crack tip blunting and plastic zone are the major factors inducing the overload retardation effect in Q&P steel.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the multi‐scale online fatigue crack deformation and growth behaviors under overload in Q&P steel

Gao,

Zhan,

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…This technology can record the whole process of specimen deformation and failure, providing support for mechanical behavior analysis. It has the advantages of convenient operation, non-contact full measurement, strong anti-interference ability, high measurement accuracy, and relaxed requirements for experimental conditions [16]. DIC has been used in many fields.…”

Section: Introductionmentioning

confidence: 99%

Strain Field Evolution Analysis of Brittle Shale with Initial Fractures Based on DIC

Liu

2023

Processes

View full text Add to dashboard Cite

Wellbore instability mainly occurs in shale formations, and it is of great significance to deeply analyze the characteristics of shale-failure behavior to evaluate the stability of the shale surrounding the well wall during drilling. Through a uniaxial compression experiment and DIC technology, the whole strain field of shale specimens with prefabricated holes and cracks under uniaxial compression is measured. The experimental data of load, displacement and strain field are analyzed comprehensively. The results show that the fracture location and expansion path of shale are closely related to the evolution of the strain field. The evolution of the strain field directly affects the failure behavior of the rock. Under the action of load, local high strain will first appear around the initial shale defects (pores and fractures), and stress concentration will occur. With the increase of load, cracks and failures will first appear in the local high-strain zone, and the failure will spread along the region and path and eventually lead to the overall failure of the rock. The establishment of a description method for shale-failure behavior through strain-field evolution can effectively analyze the crack behavior of shale with initial defects such as holes and cracks and provide theoretical and experimental bases for the stability evaluation of the shale surrounding the well wall, including shale-strength prediction and shale-failure mechanism.

show abstract

“…Kinda et al (2023) investigated the drying creep and shrinkage of cement paste from a microscopic point of view using the DIC technique under SEM and established a model between creep modulus, drying rate and relative humidity. Wang et al (2023aWang et al ( , 2023bWang et al ( , 2023cWang et al ( , 2023d added corn straw fibers to gangue powder concrete and monitored the surface of the specimens using the DIC technique, and the results of the tests showed that the addition of corn straw fibers improved the stability of the cement soil. Guo et al (2023) monitored the horizontal strain field and vertical displacement field of concrete during uniaxial compression and obtained the law of crack development with the failure mechanism of concrete, in addition, DIC technique has important applications in the analysis of strain fields in material fields such as asphalt (Klimczak et al 2023, Ren et al 2023, 2023c, 2023d, metals (Gao et al 2022, He and Feng, 2023, Kannan et al 2023 and rocks (Liu et al 2023, 2023c, 2023d, 2023e, Zhong et al 2023.…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber content on mechanical parameters and crack development of two kinds of reinforced cement soil

Zhang

Shu

2023

Mater. Res. Express

View full text Add to dashboard Cite

PVA fiber and basalt fiber are two kinds of common fibers used to reinforce cementitious materials and are widely used in engineering, therefore it is of great interest to study the effect of the content of the two kinds of fibers on the strength change of the cementitious materials. In this study, the unconfined compressive strength(UCS) test and digital image correlation (DIC) test of cement soil with different contents (0,0.25%, 0.5%, 0.75% and 1%) were carried out. The following conclusions were drawn: in the process of uniaxial compression, the curve of specimens can be roughly divided into five stages : compaction, elasticity, plastic yield, failure and residual stage; the UCS of the soil specimens increased with the increase with the content of the two kinds of fibers, the UCS of 1 % PVA fiber can be increased to 179.32 % of the control group, but when the content is greater than 0.75%, the development of strength was limited by fiber aggregation; The modulus of deformation and the compressive toughness index of the soil specimen are linearly related to the compressive strength; DIC technology can simply and efficiently monitor the horizontal strain field changes and crack development of specimens in several stages, which can be extended to the actual project.

show abstract

Fatigue crack growth behavior of marine steel under variable amplitude loading-combining DIC technique and SEM observation

Cited by 13 publications

References 30 publications

Study on the multi‐scale online fatigue crack deformation and growth behaviors under overload in Q&P steel

Study on the multi‐scale online fatigue crack deformation and growth behaviors under overload in Q&P steel

Strain Field Evolution Analysis of Brittle Shale with Initial Fractures Based on DIC

Effect of fiber content on mechanical parameters and crack development of two kinds of reinforced cement soil

Contact Info

Product

Resources

About