# A spatial closed-form nonlinear stiffness model for sheet flexures based on a mixed variational principle including third-order effects

> Research article (Precision Engineering, 2020) · cited 16× · AI/ML

**Wikidata**: [openalex:W3048502067](https://www.wikidata.org/wiki/openalex:W3048502067)  
**Source**: https://4ort.xyz/entity/a-spatial-closed-form-nonlinear-stiffness-model-for-sheet-flexures-based-on-a-mixed-variational-principle-including-thir