Title of article :
Simulating damage growth in a [90/0]s composite laminate using quasi-two-dimensional finite element methods
Author/Authors :
Philip V.D. McLaughlin، نويسنده , , SRIDHAR SANTHANAM، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Abstract :
A computationally efficient numerical method is described for predicting the details of damage growth in cross-plied and angle-plied fiber composite laminates. Separate two-dimensional plane stress meshes are used to represent each layer. Element boundaries are aligned along primary crack paths (parallel to fibers). Element corners in separate layers which share the same planar coordinates are attached to a single through-thickness node. Cracking of a layer parallel to fibers is modeled by combinations of releasing element nodal connections in the layer, creating new nodes, and/or modifying element elastic properties, depending on whether or not the layer is attached to or delaminated from one or both of its neighbors. Delaminations are modeled by releasing nodal connections between layers and creating new nodes. The essential three-dimensional character of the process, which is necessary to incorporate the effects of stacking sequence, is maintained by casting mixed-mode delamination fracture mechanics in terms of interlaminar nodal forces, and including adjacent layer constraint on the fracture mechanics of cracks in layers. Choice of element size is important to the method and has resulted in simplifications to crack propagation and fiber fracture prediction methodologies. Results to-date of predicted static damage growth in notched cross-plied carbon composites are described.
Keywords :
Delaminations , Composite , Crack , Laminate , Damage
Journal title :
COMPOSITE STRUCTURES
Journal title :
COMPOSITE STRUCTURES