Dynamic fracture characteristics of highly brittle materials by using Instrumented Charpy Impact Test

Lee, Ouk Sub; Hong, Seong Kyeong

doi:10.1007/bf02945263

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…However, the value of c ave is close to 0, and the P value is close to 1, showing that the value of c ave is extremely insignificant. Compared with the energy dissipating during elastic deformation and the plastic deformation energy, the surface energy of materials used in this research is much smaller than first two with a couple of orders of magnitude differences [13]. erefore, as a result of regression analysis, the insignificance of c ave is reasonable, suggesting that c ave may be ignored under low accuracy requirement.…”

Section: Analysis Of Impact Test Resultsmentioning

confidence: 89%

Mathematical Model for Charpy Impact Energy of V‐Notch Specimens

Wang¹,

Wang²,

Liu³

et al. 2021

Advances in Materials Science and Engineering

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Firstly, by analyzing the response of Charpy V-notch specimen impacted by pendulum, the relationship between specimen geometry, material properties, and impact energy is established and simplified, and the mathematical model for evaluating impact energy of specimens with different sizes is established. Then, the effectiveness of the model through a series of impact tests is verified. Theoretical analysis and experimental results show that the relationship between ligament length and impact energy is quadratic, while the relationship between ligament thickness and impact energy is linear. In the derivation process, the intrinsic impact toughness is used to evaluate the toughness of materials. The mathematical model makes it possible to evaluate the impact energy of specimens with different sizes and provides a theoretical basis for evaluating the impact resistance of structures.

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Section: Analysis Of Impact Test Resultsmentioning

confidence: 89%

Mathematical Model for Charpy Impact Energy of V‐Notch Specimens

Wang¹,

Wang²,

Liu³

et al. 2021

Advances in Materials Science and Engineering

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“…Therefore many researchers have investigated the calculating method of a crack extension directly from the load -load-line displacement record, such as key curve method [3], load normalization method [4][5], load ratio method [6][7] and etc. These methods are applied to calculate the crack length on the fracture resistance test for not only the standard specimens but also specimens of various types [8][9][10]. Also among these, the load normalization method was proposed to calculate the crack length under the dynamic loading condition in the standard test method [1] that modified recently.…”

Section: Introductionmentioning

confidence: 99%

Measurement Methods of Crack Length for Real-Scale Pipe Specimen

Park

Seok

2004

KEM

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Fracture resistance curves for concerned materials are required in order to perform the elastic-plastic fracture mechanical analyses for a piping system. The fracture resistance curve is built with J-integral values and crack extension values. The objective of this paper is to apply the load ratio method to the measurement of crack length for a real-scale pipe specimen. For these, the fracture test using a real-scale pipe specimen and finite element analyses were performed. The direct current potential drop method and the load ratio method were used to measure the crack extension and the crack length for a real-scale pipe specimen test. Finite element analyses about the compliance of a pipe specimen were executed for applying the load ratio method according to the crack length.

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