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Design of Reinforced Hoses


Technical Challenge:
A high-strength reinforced hose failed in service under normal operating conditions well before its intended design life. Inspections of the subject hose revealed that failure was mainly due to delamination.

The hose elongation response, internal stresses and torque balance were critical in identifying the cause of delamination and, ultimately, in redesigning the hose to meet performance requirements.

Veryst Solution:
Veryst measured stress-strain data for both the reinforced and elastomer hose materials and calibrated proprietary material models (UMATs) that captured the large strain rate dependence behavior, including damage. Veryst then modeled the hose using two nonlinear finite element models:
      1. Macro model to predict load elongation, torque balance, effect of internal fluid, and load-carrying capacity
      2. Micro model to predict local stresses and strains and identify conditions for delamination


Veryst improved the client’s ability to design for hose elongation response and torque balancing, while improving the client’s understanding of the cause of hose delamination, burst, and rupture.

Additionally the model provided predictive ability for the hose bending stiffness and elongation.

The overall result was shortening the hose redesign cycle time by investigating the effect of changes early in the design cycle.


Geometry Used for Micro Model of Reinforced Layer          

For more details on Veryst’s approach to reinforced hose analysis click here.
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