Stress corrosion cracking in plastic pipes: Observation and modeling

被引:28
|
作者
Choi, Byoung-Ho
Chudnovsky, Alexander
Sehanobish, Kalyan
机构
[1] Dow Chem Co USA, Freeport, TX 77566 USA
[2] Univ Illinois, Chicago, IL 60607 USA
[3] Dow Automotive, Auburn Hills, MI 48326 USA
关键词
D O I
10.1007/s10704-007-9092-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Stress corrosion cracking (SCC) in engineering thermoplastics is commonly observed in the form of a microcrack colony within a surface layer of degraded polymer exposed to a combined action of mechanical stresses and chemically aggressive environment. A probabilistic modeling of SCC initiation is briefly discussed. A deterministic modeling of slow stress corrosion (SC) crack growth process is developed using Crack Layer (CL) theory. Numerical solution of SC crack growth equations is discussed. Comparison of the kinetics of cracks driven by SC and by stress only is presented. Conventional plot of SC crack growth rate vs. the stress intensity factor is constructed and analyzed. An algorithm for conservative estimation of lifetime of engineering thermoplastic subject to a combination of mechanical stresses and chemically aggressive environment is discussed.
引用
收藏
页码:81 / 88
页数:8
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