The protection mechanism of arc-cracks with different radians against impact load

Chenglong Xiao; Wei Liu; Chenxi Ding; Boyang Qiao; Yi Yang; Yanchao Guo

doi:10.1016/j.engfracmech.2023.109728

The protection mechanism of arc-cracks with different radians against impact load

Chenglong Xiao, Wei Liu, Chenxi Ding^*, Boyang Qiao, Yi Yang, Yanchao Guo

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

This study investigates the protection effect of arc-cracks with different radians against impact loads using a dynamic caustics experimental system. It is found that after exceeding 120° radians, the arc-crack achieves the same crack arrest effect as the circular hole. The secondary crack initiates at the upper edge of the arc. When the crack extends into the arc, energy accumulates at the arc's upper edge and both ends. The stress intensity factor gradually decreases at the arc's upper edge by decreasing the radian and increases at the arc's two ends. The arc-crack has nearly no protection effect when the radian is less than 90°. The initiation of a secondary crack is mainly affected by the apparent fracture toughness of the arc's end. The apparent fracture toughness at the arc's end decreases with a decrease in the radian.

Original language	English
Article number	109728
Journal	Engineering Fracture Mechanics
Volume	293
DOIs	https://doi.org/10.1016/j.engfracmech.2023.109728
Publication status	Published - 1 Dec 2023

Keywords

Arc-crack
Caustics
Impact protection
Polymethyl methacrylate
Stop hole
Stress intensity factor

Access to Document

10.1016/j.engfracmech.2023.109728

Cite this

@article{cdc23e2584e448a0a478a54abac15ffa,

title = "The protection mechanism of arc-cracks with different radians against impact load",

abstract = "This study investigates the protection effect of arc-cracks with different radians against impact loads using a dynamic caustics experimental system. It is found that after exceeding 120° radians, the arc-crack achieves the same crack arrest effect as the circular hole. The secondary crack initiates at the upper edge of the arc. When the crack extends into the arc, energy accumulates at the arc's upper edge and both ends. The stress intensity factor gradually decreases at the arc's upper edge by decreasing the radian and increases at the arc's two ends. The arc-crack has nearly no protection effect when the radian is less than 90°. The initiation of a secondary crack is mainly affected by the apparent fracture toughness of the arc's end. The apparent fracture toughness at the arc's end decreases with a decrease in the radian.",

keywords = "Arc-crack, Caustics, Impact protection, Polymethyl methacrylate, Stop hole, Stress intensity factor",

author = "Chenglong Xiao and Wei Liu and Chenxi Ding and Boyang Qiao and Yi Yang and Yanchao Guo",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = dec,

day = "1",

doi = "10.1016/j.engfracmech.2023.109728",

language = "English",

volume = "293",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - The protection mechanism of arc-cracks with different radians against impact load

AU - Xiao, Chenglong

AU - Liu, Wei

AU - Ding, Chenxi

AU - Qiao, Boyang

AU - Yang, Yi

AU - Guo, Yanchao

PY - 2023/12/1

Y1 - 2023/12/1

N2 - This study investigates the protection effect of arc-cracks with different radians against impact loads using a dynamic caustics experimental system. It is found that after exceeding 120° radians, the arc-crack achieves the same crack arrest effect as the circular hole. The secondary crack initiates at the upper edge of the arc. When the crack extends into the arc, energy accumulates at the arc's upper edge and both ends. The stress intensity factor gradually decreases at the arc's upper edge by decreasing the radian and increases at the arc's two ends. The arc-crack has nearly no protection effect when the radian is less than 90°. The initiation of a secondary crack is mainly affected by the apparent fracture toughness of the arc's end. The apparent fracture toughness at the arc's end decreases with a decrease in the radian.

AB - This study investigates the protection effect of arc-cracks with different radians against impact loads using a dynamic caustics experimental system. It is found that after exceeding 120° radians, the arc-crack achieves the same crack arrest effect as the circular hole. The secondary crack initiates at the upper edge of the arc. When the crack extends into the arc, energy accumulates at the arc's upper edge and both ends. The stress intensity factor gradually decreases at the arc's upper edge by decreasing the radian and increases at the arc's two ends. The arc-crack has nearly no protection effect when the radian is less than 90°. The initiation of a secondary crack is mainly affected by the apparent fracture toughness of the arc's end. The apparent fracture toughness at the arc's end decreases with a decrease in the radian.

KW - Arc-crack

KW - Caustics

KW - Impact protection

KW - Polymethyl methacrylate

KW - Stop hole

KW - Stress intensity factor

UR - https://www.scopus.com/pages/publications/85177203135

U2 - 10.1016/j.engfracmech.2023.109728

DO - 10.1016/j.engfracmech.2023.109728

M3 - Article

AN - SCOPUS:85177203135

SN - 0013-7944

VL - 293

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 109728

ER -

The protection mechanism of arc-cracks with different radians against impact load

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this