Progressive damage modeling of spiral and ring composite structures for offloading hoses. (15th October 2016)

• Record Type: Journal Article
• Authors: Tonatto, Maikson L.P.; Forte, Maria M.C.; Tita, Volnei; Amico, Sandro C.
• Is Part Of: Materials & design. Volume 108(2016)
• Page Start: 374
• Page End: 382
• Publication Date: 2016-10-15
• Subjects: Offloading hose -- Curved composite structures -- Progressive damage model -- Crushing load; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2016.06.124
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Offloading hoses are used in several production and storage systems, such as Early Production System (EPS) and Catenary Anchor Leg Mooring (CALM). If the hose is bent until collapse (kink) of the circular section, the steel spiral within the hose undergoes plastic deformation and obstructs the section. Carbon fiber composites have been used for producing a variety of structures and recent improvement in processing has allowed the obtaining of curved profiles for selected applications. In this work, composite spirals/ring manufactured by curved pultrusion and filament winding for marine offloading hoses have been studied and a progressive damage model was used to simulate their behavior. The composites are comprised of epoxy or poly( p -phenylene sulfide) (PPS) matrix reinforced by unidirectional carbon fibers. A finite element model of the central section of the complex hose was built to compare its ultimate load crushing when composite and steel spirals and rings are used. The damage model was implemented as UMAT (User Material subroutine) linked to numerical software. The predictions of ultimate crushing load showed good agreement with the experimental results, and a maximum deviation of 2.3% was found. Graphical abstract: Highlights: Composite spiral and rings manufactured by curved pultrusion and filament winding have been evaluated via crush test. Failure and damage analyses have been implemented in a finite element model to predict crush behavior of the hose section. Computational analyses have simulated crush test behavior, showing good agreement for load versus displacement curves.