Laminated composites modeling in ADAGIO/PRESTO.

Hammerand, Daniel C.

doi:10.2172/919118

Cited by 3 publications

(7 citation statements)

References 4 publications

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“…The default value of small_num_iter is 0, meaning that the preconditioner is never re-used for the next model problem unless the SMALL NUMBER OF ITERATIONS command line is used. It is often beneficial to set small_num_iter to 10. This can often result in the re-use of the precondi-tioner over many load steps.…”

Section: Maximum Iterations Formentioning

confidence: 99%

Adagio 4.14 user<U+2019>s guide.

Spencer¹

2009

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Adagio is a Lagrangian, three-dimensional, implicit code for the analysis of solids and structures. It uses a multi-level iterative solver, which enables it to solve problems with large deformations, nonlinear material behavior, and contact. It also has a versatile library of continuum and structural elements, and an extensive library of material models. Adagio is written for parallel computing environments, and its solvers allow for scalable solutions of very large problems. Adagio uses the SIERRA Framework, which allows for coupling with other SIERRA mechanics codes. This document describes the functionality and input structure for Adagio. 3 AcknowledgmentsThis document is the result of the collective effort of a number of individuals. The current development team responsible for Adagio and Presto, the SIERRA Solid Mechanics codes, includes

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Section: Maximum Iterations Formentioning

confidence: 99%

Adagio 4.14 user<U+2019>s guide.

Spencer¹

2009

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“…4. Such models are typically used in representing the response of fiber-reinforced laminated composites.…”

Section: Constitutive Modelmentioning

confidence: 99%

“…Note that in Ref. 4, the stresses arising from thermal changes have been included. However, these loads can be considered as applied external loads and need not be included here for determining the critical time step.…”

Section: Constitutive Modelmentioning

confidence: 99%

“…Several of these tests have been documented in Ref. 4. Here an example problem verifying the calculation of the critical time step will be described.…”

Section: Verification Problemmentioning

confidence: 99%

“…The elastic laminate constitutive model for shells has been detailed in Ref. 4. PRESTO uses single point integration at the element centroid in determining the element internal force.…”

Section: Introductionmentioning

confidence: 99%

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Critical time step for a bilinear laminated composite Mindlin shell element.

Hammerand¹

2004

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The critical time step needed for explicit time integration of laminated shell finite element models is presented. Each layer is restricted to be orthotropic when viewed from a properly oriented material coordinate system. Mindlin shell theory is used in determining the laminated response that includes the effects of transverse shear. The effects of the membrane-bending coupling matrix from the laminate material model are included. Such a coupling matrix arises even in the case of non-symmetric lay-ups of differing isotropic layers. Single point integration is assumed to be used in determining a uniform strain response from the element. Using a technique based upon one from the literature, reduced eigenvalue problems are established to determine the remaining non-zero frequencies. It is shown that the eigenvalue problem arising from the inplane normal and shear stresses is decoupled from that arising from the transverse shear stresses. A verification example is presented where the exact and approximate results are compared.

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Adagio 2.9 user's guide.

2008

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Adagio is a Lagrangian, three-dimensional, implicit code for the analysis of solids and structures. It uses a multi-level iterative solver, which enables it to solve problems with large deformations, nonlinear material behavior, and contact. It also has a versatile library of continuum and structural elements, and an extensive library of material models. Adagio is written for parallel computing environments, and its solvers allow for scalable solutions of very large problems. Adagio uses the SIERRA Framework, which allows for coupling with other SIERRA mechanics codes. This document describes the functionality and input structure for Adagio. 3 AcknowledgmentsThis document is the result of the collective effort of a number of individuals. The development team responsible for Adagio and Presto, the SIERRA Solid Mechanics codes, includes Manoj

show abstract

Laminated composites modeling in ADAGIO/PRESTO.

Cited by 3 publications

References 4 publications

Adagio 4.14 user<U+2019>s guide.

Adagio 4.14 user<U+2019>s guide.

Critical time step for a bilinear laminated composite Mindlin shell element.

Adagio 2.9 user's guide.

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