- 期刊
Plastic Pipe Long-Term Pipe Stiffness by Conventional and Accelerated Test Methods
並列摘要
Parallel-plate loading mechanism (ASTM D2412 standard test method) was used for investigating the long-term pipe stiffness values of HDPE, PE corrugated, PVC and ABS pipes by conventional and accelerated test procedures. The nominal inside diameters of the test pipes were 300 and 400 mm. Generally, long-term plastic pipe stiffness values decrease as increasing test duration and shown as an S-type long-term deflection curve for the test plastic pipes on a semi-log time scale. Long-term pipe deflection is a function of pipe material properties, pipe geometry, SDR value, and external loading conditions. The Rate Process Method (RPM) was used as the accelerated method for estimating the long-term pipe deflection and pipe stiffness value in conjunction with the parallel-plate loading mechanism. Long-term plastic pipe stiffness values were formulized based upon the test results.
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