Metal Part Weak-Zone Layout for Controlled Deformation Orientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metal framework manufacturing techniques lack precise control over the nature and orientation of deformation in metal pieces, particularly elongated and compact ones, leading to unpredictable deformation patterns under load.
Innovation Solution
A metal piece design featuring at least two mechanical resistance areas on either side of a central longitudinal section, with strategically placed areas of lower mechanical strength along the length, allowing for controlled deformation by defining preferred bending axes and orientations through asymmetrical and varying width configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional metal piece design with uniform mechanical properties is used, then manufacturing is simpler, but deformation control under load is unpredictable
Solution Approach 1:
The patent applies local quality by creating areas of lower mechanical strength at specific locations within the metal piece (such as at the intersections of longitudinal and transverse walls). These localized weak zones are strategically positioned to control deformation patterns, allowing predictable bending and folding along predetermined axes while maintaining overall structural integrity in other regions.
Solution Approach 2:
The metal piece is segmented into multiple walls (longitudinal and transverse) forming compartments, with mechanical strength variations created in specific segments. This segmentation allows different regions to deform independently in controlled manner, with the longitudinal walls bending along a first axis and transverse walls folding along a second axis, achieving predictable deformation patterns.
2Strength
If metal piece has high strength throughout, then structural integrity is maintained, but energy absorption during deformation is reduced
Solution Approach 1:
The patent creates a heterogeneous structure where most regions maintain high strength for structural integrity, while specific localized areas have reduced mechanical strength. These weaker zones act as energy absorption zones during deformation, allowing the structure to collapse in a controlled manner and dissipate impact energy, while the stronger regions maintain overall structural integrity.
Solution Approach 2:
The patent converts the potential harm of structural failure into a beneficial energy absorption mechanism. By intentionally creating controlled weak zones, the structure is designed to fail in a predictable and controlled manner during impact, transforming the harmful effect of deformation into a useful energy dissipation mechanism that protects occupants.
3Reliability
If deformation pattern is unpredictable, then design is simpler, but safety performance in accidents is reduced
Solution Approach 1:
The patent uses local quality variations to create predetermined deformation paths. Areas of lower mechanical strength are positioned at specific locations (e.g., wall intersections) to guide deformation along desired axes, ensuring that longitudinal walls bend along a first axis and transverse walls fold along a second axis, achieving reliable and repeatable deformation patterns for safety optimization.
Solution Approach 2:
The patent employs asymmetric positioning of weak zones relative to the piece's geometric axes to control deformation orientation. The areas of lower mechanical strength are not symmetrically distributed but are strategically placed to create preferred bending axes that differ from the geometric symmetry axes, enabling controlled deformation in specific directions for optimal safety performance.
Data Source
AI summary
A metal piece having at least two areas of lower mechanical strength than the body of the piece, said pieces being respectively arranged on one side and the other of a longitudinal central section (PM) of said piece and alternatively located in two locations separated longitudinally along the piece, the areas of lower mechanical strength than the body of the piece being formed by local control of the stamping temperature during a stamping process of the piece, notably a process comprising steps including heating the piece to a temperature range suitable for obtaining an austenitic stage, then stamping this piece in a stamping tool suitable for defining different temperatures in the different areas of the stamped piece, for example by virtue of the voids formed in the stamping tool or by local reheating of the stamping tool.