YANG Fan,CHEN Gang,CHEN Fan,et al. Static strength design of copper cylinder based on reliability[J]. Journal of Mechanical Strength,2026,48(4):148-158.
YANG Fan,CHEN Gang,CHEN Fan,et al. Static strength design of copper cylinder based on reliability[J]. Journal of Mechanical Strength,2026,48(4):148-158. DOI: 10.16579/j.issn.1001.9669.2026.04.017.
Static strength design of copper cylinder based on reliability
Aiming at the lack of systematic reliability design method for static strength of copper thin-walled cylinders under internal pressure
a reliability design method for static strength of copper single-layer thin-walled long cylinders under internal pressure was established
and the value boundaries of key design parameters under different working conditions were quantified.
Methods
2
Firstly
a general correlation formula between cylinder reliability coefficient
test stress limit coefficient
load coefficient and safety factor was established by probability theory when both static strength and load obey normal distribution and the static strength distribution parameters are interval values
which provided a calculation basis for quantitative reliability analysis; secondly
benchmarking against the reliability standard of steel cylinders and spherical tanks
the allowable reliability coefficients of yield strength and burst strength of copper cylinders under different working conditions were determined according to the minimum service requirements; then
based on the allowable reliability coefficients
the value ranges of test stress limit coefficient
yield and burst safety factors
and load coefficient under different working conditions were determined; finally
the rationality of relevant design parameters in the national standard was verified.
Results
2
The recommended yield safety factor and burst safety factor of copper cylinder are 1.45 and 2.00 respectively
and the value ranges of test stress limit coefficient and load coefficient under different working conditions are quantified. The analytical results are basically consistent with the parameters in the national standard
which enriches the content of reliability-based static strength design of copper cylinders and provides a reference for the structural design of copper pressure-bearing cylinders.
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