Nanoscale Ribbed Plate Structure for Warp-Resistant Bending
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Solution Overview
Problem
Existing lightweight materials, such as aerogels and atomic layer deposition (ALD) films, are prone to warping and damage from stress gradients, and macro-scale lattice and sandwich structures fail to sustain sharp bending deformations without permanent damage.
Innovation Solution
A plate structure with a base plate and out-of-plane rib plates forming a strengthening rib pattern, where no straight line intersects both the base plate and rib, is developed, allowing for increased bending stiffness and ability to revert to original shape after deformation, fabricated using techniques like atomic layer deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If macro-scale lattice and sandwich structures are used to achieve high bending stiffness and low areal density, then the plate becomes lightweight and rigid, but it fails to sustain sharp bending deformations without permanent damage
Solution Approach 1:
The plate structure is segmented into multiple layers including face sheets and a core layer with periodic cellular pattern. This segmentation allows each layer to contribute differently to the overall mechanical behavior, enabling the structure to achieve high bending stiffness while maintaining the ability to sustain sharp bending deformations through controlled deformation mechanisms in the core layer
Solution Approach 2:
The invention transitions from two-dimensional planar structures to three-dimensional periodic cellular structures with out-of-plane features. The core layer incorporates vertical walls and cellular patterns that extend in the thickness direction, creating a multi-dimensional architecture that enhances both bending stiffness and deformation tolerance simultaneously
2Weight of moving object
If aerogels are used to achieve low density, then the material becomes ultralight, but it becomes fragile and susceptible to warping and damage from stress gradients
Solution Approach 1:
The invention creates a composite plate structure combining face sheets made of durable material with a core layer containing periodic cellular patterns. This composite architecture provides the ultralight weight of aerogel-like structures while the face sheets and reinforced core provide mechanical strength and resistance to warping and damage from stress gradients
Solution Approach 2:
Different regions of the plate structure have different properties: the face sheets provide structural integrity and damage resistance, while the core layer with periodic cellular patterns provides lightweighting and flexibility. This local differentiation of material properties allows the structure to achieve low density without sacrificing overall strength and warping resistance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The plate structure achieves ultralight and robust properties with bending stiffness several orders of magnitude greater than single-layer films, maintaining shape integrity under large deformations and returning to original form without permanent damage.
Implementation Method 1
applying a plate structure material to the plate structure pattern
Data Source
AI summary
A nanoscale plate structure includes base plates and rib plates with nanoscale thickness and macroscopic lateral dimensions. The base plate resides in the first plane, the ribs can reside out-of-plane and form at least one strengthening rib, and additional base plates can reside in planes parallel to the first plane. The strengthening rib can be patterned such that there is no straight line path extending through a lateral dimension of the plate structure that does not intersect the at least one base plate and the at least one strengthening rib. The plates and ribs used in the structure have a thickness between about 1 nm and about 100 nm. The plate structures can be fabricated using a conformal deposition method including atomic layer deposition.