scholarly journals Resistance Coefficients for Non-Newtonian Flows in Pipe Fittings

Rheology ◽  
10.5772/34199 ◽  
2012 ◽  
Author(s):  
Veruscha Fester ◽  
Paul Slatter ◽  
Neil Alderm
Keyword(s):  
Newtonian Flows ◽  
Pipe Fittings ◽  
Resistance Coefficients

Time Dependances of the Resistance Coefficients of Polymeric Materials

INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
A. V. Matseevich ◽  
◽  
A. A. Askadskii ◽  
Keyword(s):  
Time Dependence ◽  
Physical Mechanism ◽  
Polymeric Materials ◽  
Resistance Coefficient ◽  
Constant Stress ◽  
Time To Rupture ◽  
Structure Sensitive ◽  
Material Durability ◽  
Resistance Coefficients ◽  
Extremal Character

One of the possible approaches to the analysis of a physical mechanism of time dependence for the resistance coefficients of materials is suggested. The material durability at the constant stress is described using the Zhurkov and Gul' equations and the durability at the alternating stress—using the Bailey criterion. The low strains lead to structuring of a material that is reflected in a reduction of the structure-sensitive coefficient in these equations. This affords 20% increase in the durability. The dependence of the resistance coefficient assumes an extremal character; the maximum is observed at the time to rupture lg tr ≈ 2 (s).

COPPER ALLOY No. C84200

Alloy Digest ◽  
1982 ◽  
Vol 31 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Lead Alloy ◽  
Good Resistance ◽  
Copper Zinc ◽  
Pipe Fittings ◽  
Strength And Ductility

Abstract Copper Alloy No. C84200 is a free-cutting copper-zinc-tin-lead alloy. It is characterized by good casting properties, moderate strength and ductility, good machinability and good resistance to corrosion. Formerly used named (not recommended) are 101, Leaded Semi-Red Brass and 80-5-2.5-12.5. Typical applications are pipe fittings, bushings, locknuts and unions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-446. Producer or source: Copper alloy foundries. See also Alloy Digest Cu-450, December 1982.

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