Modification of the Johnson–Cook model for metal at a wide range of strain rates and application in the dynamic response of honeycomb panels

Li, Shuangbei; Su, Quanfu; Wang, Xiangyu; Yuan, Wei; Zhang, Xuan; Chang, Yanjun

doi:10.1088/1361-651x/ac9d53

Cited by 3 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Depending on a particular problem being solved and on the availability of relevant experimental data, the effects of a material stress state, strain rate, temperature, and other factors may be implemented into the plasticity and/or fracture parts of a material model, no matter whether it is coupled or uncoupled. As a result, despite their less sound physical basis, uncoupled models are much more popular in research and engineering practice [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A Study of the Dynamic Mechanical Properties of Q460D Steel

Huang,

Lin,

et al. 2023

Metals

View full text Add to dashboard Cite

The dynamic mechanical properties of Q460D steel were studied to facilitate an assessment of the impact resistance of building structures. In the present work, material performance tests of Q460D steel at different temperatures, strain rates, and stress states were conducted. Using a hybrid experimental–numerical approach, a modified Johnson–Cook (JC) constitutive relation, a modified Johnson–Cook (JC) fracture criterion, and a lode-dependent fracture criterion were calibrated. To validate the calibration, Taylor impact tests of Q460D steel rods onto rigid target plates were carried out in a one-stage light-gas gun system. Mushrooming, tensile splitting, and petalling failure modes were obtained as the impact velocity was increased from 191.6 to 422.1 m/s. A three-dimensional finite element model was built for the Taylor impact tests, and FE simulations were run using the material models calibrated. It was found that the FE simulations using the lode-dependent fracture criterion were reasonable in terms of the failure modes of the Taylor rods. In contrast, the fracture behavior of the Taylor rods was significantly underestimated using the lode-independent JC fracture criterion. Finally, the effect of anisotropy, strain rate sensitivity and yield plateau on the Taylor impact FE predictions were explored and discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

A Study of the Dynamic Mechanical Properties of Q460D Steel

Huang,

Lin,

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

Research on bionic design of cylindrical milling cutter based on the curvilinear configuration of the rake face of beaver teeth

Lei,

Xie,

et al. 2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

：Bionic design of cutting tools to reduce working resistance and energy consumption has always been a concern of people.The curve of the rake face of beaver teeth is fitted and its general expression is obtained. The function is used in the configuration design of the bionic alignment of the front cutter face of cylindrical milling cutter, and the bionic curvilinear configuration rake face cylindrical milling cutter is designed. By constructing a three-dimensional milling simulation model of a cylindrical milling cutter, the cutting performance of a cylindrical milling cutter with a bionic collinear configuration and a cylindrical milling cutter with a flat front face was analyzed by comparing the milling simulation with a cylindrical milling cutter with a bionic collinear configuration composed of different combinations of front face collinear parameter values. The results show that the designed bionic collinear configuration front face cylindrical milling cutter exhibits certain force saving effect and is verified by right angle free cutting experiments, but its drag reduction performance is affected by the parameter values of the collinear. The optimized parameter values of the front face collinear of the tool with a certain side draft are obtained by genetic algorithm combined with finite element simulation analysis, and the optimal combination of collinear parameter values is obtained. Key words：Cylindrical milling cutter； Bionic design； Finite element simulation； Milling force； Optimization of tool geometric parameters 0 Introduction *1According to statistics, in metal cutting, the energy consumed by the metal workpiece after plastic deformation into chips accounts for more than 70% of the total energy consumed [1], and most of this energy is converted into heat and dissipated. Therefore, reducing some unnecessary energy losses while machining metal workpieces and improving the cutting efficiency of metal cutting tools is a meaningful and worthwhile research problem in the current environment [2][3][4].Cutting requires three necessary conditions, the tool for cutting, the workpiece to be machined, and the cutting motion between the tool and the workpiece [5]. From a bionic point of view, there are cutting processes similar to it in nature. The teeth, claws and toes of some animals in nature, as well as the leaves of plants and other parts are equivalent to the tools used for cutting, trees, soil and stalks of crops can be equivalent to the workpiece being processed, and the behavior of animals gnawing trees and digging soil can be seen as the cutting movement between the tool and the workpiece.The contours of the teeth, claws and toes, and leaves of these plants and animals are generally geometric configurations that contain some special shape features, which have evolved over billions of years and have their own intrinsic biomechanical mechanisms [6][7][8]. New cutting tools designed by using the special contour shape of these animal teeth and claws and toes usually exhibit excellent friction and d...

show abstract