CAJ | 학술논문

文章对某厂5台超高压水晶釜进行疲劳断裂分析，结果表明，该厂5台在役水晶釜釜体内壁存在深a0＝1 mm ，半长 c0＝3 mm的半椭圆表面裂纹时裂纹均会扩展，且均不满足“未爆先漏”条件，存在爆炸性脆性破裂的危害，同时得到了1＃水晶釜表面裂纹不同尺寸的裂纹萌生寿命与整个疲劳寿命的理论比值，该值与材料疲劳损伤试验结果相吻合。
문장대모엄5태초고압수정부진행피로단렬분석，결과표명，해엄5태재역수정부부체내벽존재심a0＝1 mm ，반장 c0＝3 mm적반타원표면렬문시렬문균회확전，차균불만족“미폭선루”조건，존재폭작성취성파렬적위해，동시득도료1＃수정부표면렬문불동척촌적렬문맹생수명여정개피로수명적이론비치，해치여재료피로손상시험결과상문합。
Fatigue fracture analysis of five super‐high pressure crystal vessels in a factory was carried out .The results show that the semi‐elliptical surface crack in the inside wall of crystal vessel will ex‐tend when a0 =1 mm ,and c0 =3 mm and the condition of “leak‐before‐break” is not satisfied .The crystal vessel with semi‐elliptical surface crack has the risk of explosive brittle fracture .The theoreti‐cal ratio of the crack initiation life to the fatigue life in the No .1 crystal vessel with different surface crack sizes is obtained ,which agrees well with the result of the material fatigue damage test .