3D Printed Solidification Layout for Impact-Directed Crack Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D printing techniques do not effectively enhance the impact resistance of fabricated objects by strategically varying the degree of solidification within the object, leading to inadequate distribution of energy absorption during impacts.
Innovation Solution
The method involves forming a 3D object with multiple layers of build material, where specific areas are solidified to a lower degree than others, creating regions with varying densities and fracture toughness to guide energy propagation and absorb impact forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If uniform solidification is applied throughout the object, then manufacturing simplicity is maintained, but impact resistance is insufficient due to inadequate energy absorption distribution
Solution Approach 1:
The patent applies different solidification degrees to different regions of the object. A first area is solidified to a first degree while a second area is solidified to a second degree that is less than the first degree. This local differentiation allows the second area to absorb impact energy more effectively while maintaining overall structural integrity, resolving the contradiction between impact resistance and manufacturing complexity.
Solution Approach 2:
The patent changes the solidification parameter (degree of solidification) across different regions of the object. By controlling the solidification degree to vary from the first area to the second area, the material properties are optimized for impact resistance in specific regions without requiring complete redesign of the manufacturing process, thus improving impact resistance while limiting complexity increase.
2Stability of the object's composition
If complete solidification is applied to all areas, then structural integrity is maximized, but energy propagation during impact is restricted leading to concentrated damage
Solution Approach 1:
The patent creates a localized region (second area) with reduced solidification degree compared to the surrounding first area. This local variation allows impact energy to propagate through the second area more effectively, distributing energy absorption throughout the object rather than concentrating it in one location, thus maintaining structural integrity while improving energy absorption capacity.
Solution Approach 2:
The patent converts what would normally be considered a weakness (lower solidification degree in the second area) into a beneficial feature for impact resistance. The less densely solidified region acts as an energy dissipation zone that protects the overall structure by absorbing and distributing impact energy, transforming a potential vulnerability into a protective mechanism.
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
This approach enhances the impact resistance of the object by allowing energy from impacts to propagate through weaker areas, reducing damage and directing cracks to predefined locations within the object, thereby improving its structural integrity.
Implementation Method 1
The processor controls a fabricating system to selectively solidify a first area of the layer to a first degree and selectively solidify a second area of the layer to a second degree that is less than the first degree
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
According to examples, an apparatus may include a fabricating system, a processor, and on memory on which are stored machine readable instructions. The instructions, when executed by the processor, may cause the processor to control the fabricating system to spread a first layer of build material as part of an object fabrication process, the build material comprising particles or a paste. The instructions may also cause the processor to control the fabricating system to selectively solidify a first area of the layer to a higher degree of solidification than a predefined second area encompassed by the first area, in which the predefined second area has a lower fracture toughness than the first area to propagate a crack in the object more readily than the first area.