Review of the Progress and Application on the GTN Meso-damage Model

doi:10.3901/JME.2024.02.062

Abstract

Abstract: Meso-damage mechanics analysis is widely used in the fields of ductile metal damage, fracture and forming limit prediction. The Gurson-Tvergaard-Needleman(GTN) damage model is one of the most essential classical models in the field of meso-damage mechanics. The model combines the micro-void evolution process with the macroscopic mechanical behavior to describe materials’ meso-damage mechanism and macroscopic damage failure behavior under external loads A large number of experimental studies have shown that under the stress state dominated by shear loads, the void volume fraction in the material does not increase significantly, but failure still occurs. Because the traditional GTN model only considers the influence of void volume fraction on the damage behavior of metal materials, the GTN model is unsuitable for damage and fracture prediction under medium and low stress triaxiality. Therefore, many scholars have modified the original GTN model. The development of mesoscopic damage mechanics and GTN model is summarized, several typical correction methods of GTN model are analyzed and their applicable scope and advantages and disadvantages are summarized, and the parameter calibration methods of GTN model are summarized. The application of the GTN mesoscopic model in the industrial field is classified and sorted out, and the development trend of the GTN model is forecasted, which can provide a reference for future researches and applications of the GTN model.

Key words: meso damage, GTN model, damage mechanics, plastic forming, shear modified

CLC Number:

O344

CHEN Xin, YANG Lifei, YU Xue, GONG Yingying. Review of the Progress and Application on the GTN Meso-damage Model[J]. Journal of Mechanical Engineering, 2024, 60(2): 62-80.

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