In this study, quality keywords of frequent mention of failures were extracted by analyzing the field operational data of main battle tanks recorded for about 5 years. As a result of the data analysis, the leaf spring assembly of the crew hatches corrosion and failure was frequently occurred. FEA(Finite Element Analysis) and tests were performed to analyze the cause of the failure, and it was confirmed that durability of the leaf spring was insufficient. Therefore a design modification study was conducted to improve durability of the leaf spring, and FEA and durability tests demonstrated the improvement. As a result, the durability of leaf spring was improved at least 3.3 times compared to before improvement. This study will contribute to suggesting the use of data analysis in the defense area and improving the operability of the main battle tanks.

ABSTRACT
1. 서 론
2. 연구대상 선정
3. 원인분석
4. 내구성 개선 및 입증
5. 결 론
References

• 윤효진(Defense Agency for Technology and Quality) | Hyo-Jin Yoon Corresponding Author
• 김태윤(Hyundai Rotem Company) | Tae-Yun Kim
• 남윤욱(Defense Agency for Technology and Quality) | Yoon-Wook Nam
• 김경로(Defense Agency for Technology and Quality) | Kyung-Ro Kim