Use of Digimat to Simulate Progressive Failure in a T-stiffener Accounting Voids Due to Manufacturing Defects
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Abstract
Laminate T-stiffeners are widely used in the aerospace industry to transfer the 3D complex loads between the stiffener and the
skins. However, the way they are manufactured can affect their inherent properties.
In this case, we have considered that the stiffener and the skin were assembled using an RTM process but because of the poor
infiltration of the resin due to the fiber orientation changings, some dry spots appear in the noodle. These dry spots or voids affect the mechanical properties of the noodle and this knockdown of properties must be taken into account during the design process. In addition, the design of such component requires taking into account the progressive damage that can appear in the composite durign the pull-off test.
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e-Xstream engineering