Finite Element Modeling of Tensile Instability of Sheet Metals Considering Nonuniform Mechanical Properties

Tang, Haoxing; Wen, Tong; Zhou, Yunhua; Yang, Fan; Zheng, Yu

doi:10.1007/s11665-021-06492-8

Cited by 2 publications

(1 citation statement)

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“…When the strain is reduced to a certain limit value,

, sheet tensile instability occurs. The schematic diagram of the classical M–K theory is shown in Figure 2 a. M–K theory is commonly employed to predict local necking phenomena or evaluate forming limit strain, and it is a common method to calculate the forming limit curve (FLC) for local necking strain in thin sheet [ 31 , 32 ]. However, it should be noted that the classical M–K model assumes that the initial groove is perpendicular to the principal stress direction, so it is only suitable for calculating the ultimate strain in the right region of FLC [ 33 ].…”

Section: Definition Of Deformation Instabilitymentioning

confidence: 99%

Theory, Method and Practice of Metal Deformation Instability: A Review

Wan

Yao

et al. 2023

Materials

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Deformation instability is a macroscopic and microscopic phenomenon of non-uniformity and unstable deformation of materials under stress loading conditions, and it is affected by the intrinsic characteristics of materials, the structural geometry of materials, stress state and environmental conditions. Whether deformation instability is positive and constructive or negative and destructive, it objectively affects daily life at all times and the deformation instability based on metal-bearing analysis in engineering design has always been the focus of attention. Currently, the literature on deformation instability in review papers mainly focuses on the theoretical analysis of deformation instability (instability criteria). However, there are a limited number of papers that comprehensively classify and review the subject from the perspectives of material characteristic response, geometric structure response, analysis method and engineering application. Therefore, this paper aims to provide a comprehensive review of the existing literature on metal deformation instability, covering its fundamental principles, analytical methods, and engineering practices. The phenomenon and definition of deformation instability, the principle and viewpoint of deformation instability, the theoretical analysis, experimental research and simulation calculation of deformation instability, and the engineering application and prospect of deformation instability are described. This will provide a reference for metal bearing analysis and deformation instability design according to material deformation instability, structural deformation instability and localization conditions of deformation instability, etc. From the perspective of practical engineering applications, regarding the key problems in researching deformation instability, using reverse thinking to deduce and analyze the characteristics of deformation instability is the main trend of future research.

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“…When the strain is reduced to a certain limit value,

Section: Definition Of Deformation Instabilitymentioning

confidence: 99%