Cause analysis and finite element simulation of cracking of drying barrel in wave wheel dehydrator
WANG Hui-ping1, LIU Ying-chun1, YUAN Bei-zhe1 YANG Bo2, DU Ying3, ZHONG Zhen-qian*2
1. China National Institute of Standardization, Beijing 100191, China; 2. NCS Testing Technology Co., Ltd., Beijing 100081, China; 3. University of Science and Technology Beijing, Beijing 100091, China
Abstract：The consumer feedback information indicated that the drying barrel of a brand of dehydrator might be cracked in the process of use. In order to analyze the reasons for accident, a series of tests were carried out for the dehydrator of accident brand and contrast brand. By using tensile test, pressure test, section structure analysis of joint area and finite element simulation, the cracking reasons of drying barrel and the stress distribution of inner wall were studied. The results of tensile test and pressure test showed that the bonding force at the joint of the accident drying barrel was very weak, only 13% of the strength of the normal barrel body. The strength of the joint area of the contrast brand drying barrel was equivalent to the strength of the barrel body, which was about 5.7 times of the former. The analysis of section structure of the joint area showed that the difference of joint mode between two barrels resulted in the difference of their strength. The former was the crimping joint connection, while the latter was connected by welding. The stress distribution of drying barrel was analyzed by finite element method. The results showed that the stress level at the joint of accident brand was higher, and the cracking risk under the same working condition was much higher than that of the contrast brand. Both experimental analysis and finite element theoretical calculation indicated that the main reason for cracking was the low binding force at the crimping joint for the accident brand dehydrator.
王慧萍, 刘迎春, 袁北哲, 杨波, 杜莹, 钟振前. 波轮式脱水机甩干桶爆裂原因及有限元模拟分析[J]. 冶金分析, 2020, 40(6): 68-74.
WANG Hui-ping, LIU Ying-chun, YUAN Bei-zhe YANG Bo, DU Ying, ZHONG Zhen-qian. Cause analysis and finite element simulation of cracking of drying barrel in wave wheel dehydrator. , 2020, 40(6): 68-74.
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