FRP DUCTING DESIGN FEA SUMILATION

1.1 Introduction 

This report aims to check the design adequacy of the modified rectangular header and branch duct branch.   

This analysis is carried out with Finite Element analysis using Solidworks simulation static structure composite analysis.   

The design of the ducts is based on the requirements of SMACNA. 

Construction of the FRP ducts is by filament winding for the circular ducts and by hand lamination for the rectangular ducts. The material's properties have been taken from Win Fung Test figures for this construction. 

For conservatism, a small reduction in properties have been assumed. 

The corrosion barrier has been included in the structural calculations as per SMACNA as the environmental conditions are not severe. The corrosion barrier V,2M, is approx. 2.5mm thick. 

1.2 Code & Reference Documents 

a. Thermoset FRP Duct Construction Manual SMACNA 

b. ASME RTP-1 

c. PUB/WRP/CWRP-2/MXXX 

d. P2E-CWRP-HSL-20-WF-D-001 $ 003 

1.3 Design Parameters 

Design Temperature Ambient 

Design Pressure +/-7kPa & +/-9kPa As Required 

Specific Gravity NA 

Chemical Conditions Hydrogen Sulphide Gas 

Resin System VE 

Corrosion Barrier C Glass Veil + 900gsm CSM VE 

Wind Loading Not Applicable 

Location Singapore 

 1.5 Material Specification 

As tested hand lamination figures for MWM construction 

Tensile Strength 195MPa 

Tensile Modulus 11.8GPa 

Allowable laminate stress 19.5MPa 

 Figures For CSM 

Tensile Strength 90MPa 

Tensile Modulus 8 GPa 

Allowable laminate stress 12Mpa