Failure Prediction in a Laminated Composite Shell
Application ID: 65641
Laminated composite shells made of carbon fiber reinforced plastics (CFRP) are common in a large variety of applications due to their high strength to weight ratio. Evaluation of the structural integrity of a laminated composite shell for a set of applied loads is necessary to make the design of such structures reliable.
This example shows how to model laminated composite shells using the Layered Linear Elastic Material model in the Shell interface available with the Composite Materials Module.
The structural integrity of a laminate with different fiber orientations in each ply is assessed through the parameters called Failure Index and Safety Factor, using different polynomial failure criteria. Because of the orientation, each ply will have different stiffness in the longitudinal and transverse directions, and hence different response to the loading. The analysis using a polynomial failure criterion is termed first ply failure analysis, where failure in any ply is considered as failure of the whole laminate. In this example, seven different polynomial criteria are compared.
This model is a NAFEMS benchmark model, described in Benchmarks for Membrane and Bending Analysis of Laminated Shells, Part 2: Strength Analysis. The COMSOL Multiphysics solutions are compared with the reference data.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.