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  • Summary & Details

Parameter Estimation for Spot Weld Fracture Prediction Models Using Data Assimilation

データ同化によるスポット溶接破断予測モデルの特性推定

Detailed Information

Author(J)1) 伊藤 里沙子, 2) 石橋 慶輝, 3) 佐藤 太一, 4) 登坂 泰浩
Author(E)1) Risako Ito, 2) Yoshiteru Ishibashi, 3) Taichi Sato, 4) Yasuhiro Tosaka
Affiliation(J)1) 日産自動車, 2) 日産自動車, 3) 日産自動車, 4) 日産自動車
Affiliation(E)1) Nissan Motor, 2) Nissan Motor, 3) Nissan Motor, 4) Nissan Motor
Abstract(J)CAEによるスポット溶接の破断予測は,従来は溶接部に作用する荷重を評価指標としてきたが,破断起点となる熱影響部の複合入力による応力状態を再現するより詳細な溶接部モデルが提案されている.しかし,試験による熱影響部の特性取得は容易ではないため,本報ではデータ同化により材料・破断特性推定を試みた.

Translation

Abstract(E)Regarding fracture prediction of spot welds in FEM analysis, the current major method is based on load criteria. Recently, more detailed spot weld models have been proposed in order to reproduce the spot weld failure based on multiaxial stress state under combined loading on the heat-affected zone (HAZ), where fracture initiates. However, it is difficult to directly measure the material properties of the HAZ through experiments. In this study, data assimilation is applied to estimate the material properties of the HAZ.

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