A novel method to determine critical CTOA directly by load-displacement curve

Zhen, Ying; Li, Xuyang; Cao, Yanjie; Zhang, Shihua

doi:10.1016/j.engfracmech.2020.107013

Cited by 10 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The engineering and true stress–strain curves are illustrated in Figure 1 while the determined fundamental material parameters of X80 pipeline steel are listed in Table 1. Meanwhile, the load–displacement curve of the three‐point bending test was obtained, and details of the experiment and data were published in the author's previous work 25 …”

Section: Experiments and Simulationsmentioning

confidence: 99%

“…The typical finite element meshes are shown in Figure 4. According to the results of the three‐point bending test in reference, 25 the damage parameters of GTN model of X80 pipeline steel were calibrated. The results show that the FE model gives the best agreements with the experimental data when the damage parameters are set as listed in Table 3.…”

Section: Experiments and Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

A novel unified characterization parameter of in‐plane and out‐of‐plane constraints based on critical CTOA

Zhen

Chang

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

There is much controversy in using laboratory specimens to predict the fracture behavior of large industrial constructions because of their different constraints. Although several parameters have been proposed to characterize the constraint effect, there are still some limitations. To address this issue, a novel unified characterization parameter of constraint based on the critical crack tip opening angle (CTOAC) is defined. Firstly, the calibrated finite element technologies for simulation of static and dynamic crack are used to determine the equivalent plastic strain (εp) distribution around the crack tip and the evolution history of CTOA for specimens with different in‐plane and out‐of‐plane constraints, respectively. Secondly, the feasibility of the equivalent plastic strain at the crack tip when CTOA reaches its critical value to unified measure both in‐plane and out‐of‐plane constraints is investigated. The results indicate that the area APEEQ surrounded by the isoline of equivalent plastic strain εp can describe both in‐plane and out‐of‐plane constraints and the interaction between them. Finally, a novel constraint characterization parameter η is defined. It is found that there is a linear relationship, which depends only on the material and regardless of the selection of the εp isoline, between the normalized fracture toughness CTOAC/CTOAref and η1/2. The work in this paper is expected to realize the matching of constraints between different laboratory specimens or industrial constructions.

show abstract

Section: Experiments and Simulationsmentioning

confidence: 99%

Section: Experiments and Simulationsmentioning

confidence: 99%

A novel unified characterization parameter of in‐plane and out‐of‐plane constraints based on critical CTOA

Zhen

Chang

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

show abstract

“…They overcome the limitations of jetting machines in cutting hard soils and the need for high-powered towing vessels for plough-type machines. Broadly categorized, they include chain-type, disc-type, and column-type mechanical cable laying machines based on their operational principles [6,7]. Among these, the chain-type machine is simple in structure, easy to assemble, creates stable trench profiles, and uses a multi-blade chain drive system to achieve high-speed, low-depth soil cutting.…”

Section: Introductionmentioning

confidence: 99%

Design and Study of Mechanical Cutting Mechanism for Submarine Cable Burial Machine

Yu,

Jin,

Wang

et al. 2023

JMSE

View full text Add to dashboard Cite

This paper aims to explore the current state of research on submarine cable burial machines and proposes a novel mechanical burial machine design employing a chain-type structure based on a combination of theoretical considerations and practical requirements. Through theoretical analysis, simulation, and experimental studies, the cutting process of the mechanical burial machine is investigated in detail, with special attention given to the seabed conditions in the Northeast Asia region. Starting from the dynamic process of the blade–soil interaction and the working mechanism of the blade–soil system, an accurate and reliable model for the seabed rock–soil stress is established, along with a fast computation method. A destructive analysis of rock–soil mechanical cutting is performed, elucidating the influences of the cutting depth, cutting angle, and chain blade cutting speed on cutting resistance. This paper provides reference parameters for the design of chain-type trenching devices under different seabed conditions, and adjustments are made based on simulation experiments and actual soil trenching test results. These analyses contribute practical and reliable guidance for the design and optimization of submarine cable burial machines.

show abstract

A reconstruction method to determine crack length based on virtual extensometers

Cao

Jiao

Zhen

et al. 2022

Engineering Fracture Mechanics

View full text Add to dashboard Cite

A novel method to determine critical CTOA directly by load-displacement curve

Cited by 10 publications

References 26 publications

A novel unified characterization parameter of in‐plane and out‐of‐plane constraints based on critical CTOA

A novel unified characterization parameter of in‐plane and out‐of‐plane constraints based on critical CTOA

Design and Study of Mechanical Cutting Mechanism for Submarine Cable Burial Machine

A reconstruction method to determine crack length based on virtual extensometers

Contact Info

Product

Resources

About