Strategies for modelling delamination growth using isogeometric continuum shell elements

• The computational efficiency of CAE models and methods for analysing failure progression in compositesis important to enable their use in full scale models. In particular, efficient approximation andsolution methods for delamination modelling is crucial to meet today’s requirements on virtual developmentlead times. For that purpose, several papers have been published that present alternative methodsfor modelling concepts which support laminate failure analyses requiring only one shell element throughthe thickness and where arbitrary delamination propagation is accounted for only in areas where it isneeded. The proposed new concepts however need to be further developed before they can bereadily applied to solve engineering problems. As for the alternative concept based on an isogeometricapproach by Hosseini et al., there is a need to handle successive introduction of new discontinuitiesby means of knot-insertion in an automated fashion. To this end, better predictions of the throughthe-thickness distribution of out-of-plane stresses are needed. In this paper we focus on the furtherdevelopment of the isogeometric continuum shell element to allow for an automated insertion of discontinuities.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

Nyckelord

Continuum Shell Formulation

Cohezive zone method

Delamination

Isogeometric Analysis

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