이종소재 점용접부의 파단특성 연구

다국어 초록 (Multilingual Abstract)

This paper is concerned with the failure characteristics and the failure criterion of spot welds of a dissimilar AHSS combination under combined axial and shear loading conditions. In order to keep the constant ratio of the axial load to the shear load acting on the spot weld during the failure test, the testing fixture and the specimen proposed by Song et al. for a loading angle ranging from 0° to 75° and the newly designed fixture and specimen for loading angle of 90° are used for the failure tests to obtain failure loads and to identify the failure behavior of spot weld of a dissimilar AHSS combination. The newly designed fixture and specimen can obtain more correct failure loads as preventing rotation of spot welds during the failure tests at a loading angle of 90°. The failure loads of spot welds were investigated with experiments for the spot weld of DP780 1.2t and DP980 1.2t steel sheet combination. The failure loads obtained at various loading angles are utilized to construct the failure criterion proposed Song and Huh for description of failure behavior of spot welds in the crash analysis or the strength analysis of an auto-body.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이종소재 점용접부 파단시험
• 3. 파단모델의 구성
• 4. 결론
• References