Enhanced Deterministic Performance of Panels Using Stochastic Variations of Geometry and Material

Robust improvement of the asymmetric post-buckling behavior of a composite panel by perturbing fiber paths

“…Deterministic improvement of the buckling load of the baseline structure is achieved by analyzing the effects of random variations applied to the fiber angle. The authors' previous work has led to an increase of linear buckling loads by varying the thickness of Young's modulus in similar structures [28]. Similar to that approach, correlation patterns of fiber angle variations of every layer show the local influence of fiber angle changes.…”

“…Variations analyzed in this paper are generated and applied by combining several different techniques and methods. These techniques have been previously applied and discussed in [28]. Geodesic distances define the correlation between points on a random field.…”

“…Correlation patterns generated using a large correlation length will vary over a relatively large distance. Shorter correlation lengths will lead to correlation patterns with more localized deviations, and a higher potential improvement [28]. Which correlation length to use while generating correlation patterns may also be determined by manufacturing considerations.…”

“…Analyzing the influence of local variations on the buckling load of a structure can give a non-dimensional pattern of influence of a structural parameter. Previous work of the authors has improved the deterministic linear buckling load of isotropic structures by tailoring the local thickness and Young's modulus [28]. Developments presented in this paper include its application on a non-linear problem, fiber angles of composite structures, and robustness analyses.…”

Improving the fatigue life of printed structures using stochastic variations

“…The approach used to improve the fatigue life of a structure is based on earlier work on buckling loads presented in [3,4]. This approach uses random fields to generate random patterns of thickness distributions within a thin-walled structure.…”