1993-11-01

Thermal-Mechanical Stresses Induced in the Fabrication and Curing of Multilayered Fabric and Wire Reinforced Elastomeric Hose 931961

A simple one dimensional radial displacement plane stress analysis is used to establish new equilibrium states at each of eight significant thermal and mechanical manufacturing stages of spiral hose fabrication. Individual effects are assumed additive. Cumulative layer hoop stress is used to approximate off-angle helical wire tension in the cured mandrel-free composite. These locked-in fabrication tensions are then superimposed on previously obtained thin shell laminate finite element results for a representative pressurized hose type. On an average, the locked in pre-tensions amounted to almost twenty percent of finite element generated pressurized tensions. Consequently, effective hose design must include both fabrication and working pressurized consideration.

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