Multiscale Model Synthesis to Clarify the Relationship between Microstructures of Steel and Macroscopic Brittle Crack Arrest Behavior - Part I: Model Presentation

Multiscale Model Synthesis to Clarify the Relationship between Microstructures of Steel and Macroscopic Brittle Crack Arrest Behavior - Part II: Application to Crack Arrest Test

“…As described in the first part of the present paper, 9) the proposed multiscale model as an integrated macroscopic model is performed by systematically integrating (1) a preparatory macroscopic finite element analysis and (2) a Monte Carlo simulation of microscopic analysis for cleavage fracture into (3) a macroscopic analysis for brittle crack propagation and arrest in steel plate. That is, the integrated macroscopic model is composed of the three-staged analyses.…”

“…The integration between microscopic and macroscopic models to simulate the complex behavior of brittle crack propagation and arrest is required to bridge a large scale gap between 10 0 m in macroscopic scale and 10 − 9~1 0 − 4 m in microscopic scale. In the first part of the present paper, 9) we propose a new multiscale model by a "model synthesis" approach, as the first attempt to clarify the relationship between microstructures and macroscopic brittle crack propagation/arrest behavior in steel plate. The multiscale model consists of two models: (1) a microscopic model to simulate cleavage fracture in the grain scale and (2) a macroscopic model to simulate brittle crack propagation and arrest behavior in the steel plate scale.…”

“…9) This section is composed of three parts. Firstly, the test steel for temperature gradient crack arrest test is described in Section 3.1.…”

鋼材の脆性破面形態に関する数値シミュレーションと実験

“…Similar result was noticed in 10) . Shibanuma et al 12) and Yamamoto et al 13) extended the study of 11) to macroscopic brittle crack propagation.…”