Composite Turbine Blade-Platform Joint With Undulating Preform Split
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing bladed components in aircraft turbine engines using composite materials create a preferred axis of rotation or deformation due to rectilinear disconnects between the blade and platform, leading to undesirable deformation under operating stresses and affecting component life and performance.
Innovation Solution
A method involving the production of a fibrous preform with a disconnect defining two superimposed portions connected by a generally undulating connecting line, which stiffens the connection between the blade and platform, enhancing mechanical strength and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectilinear disconnect is used to separate the preform into portions for platform formation, then the manufacturing process is simple, but the bladed component develops a preferred axis of rotation leading to undesirable deformation under operating stresses
Solution Approach 1:
The disconnect line is designed with a sinusoidal or undulating curved shape instead of a straight line. This curvature eliminates the preferred axis of rotation that would otherwise exist, thereby preventing the bladed component from deforming around a specific axis when subjected to operating stresses such as aerodynamic pressures and engine structural forces.
2Device complexity
If a rectilinear connecting line is used to join portions at the junction between blade and platform, then the structural alignment is straightforward, but the connection becomes a weak point prone to deformation
Solution Approach 1:
The connecting line joining the portions at the blade-platform junction follows a sinusoidal or undulating path rather than a straight line. This curved geometry distributes stresses more evenly across the connection, eliminating stress concentration points that would occur with a rectilinear connection, thereby enhancing the mechanical strength and resistance to deformation of the joint.
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 undulating connecting line eliminates the axis of rotation, improving mechanical strength and service life of the bladed component by limiting deformation under aerodynamic and structural forces.
Implementation Method 1
the undulating connecting line eliminates the axis of rotation, improving mechanical strength and service life of the bladed component by limiting deformation under aerodynamic and structural forces
Data Source
AI summary
A method for producing a bladed component for an aircraft turbine engine, this bladed component comprising including a blade which has a stacking axis and at least one longitudinal end of which is connected to a transverse platform, the method including the steps of: a) producing a fibrous preform, this preform including a first part that is intended to form a blade and at least one second part that is intended to form a platform, this second part of the preform including a disconnect that defines two stacked portions that are separated by a disconnect surface that is substantially parallel to the axis, b) folding the portions, respectively, on two opposing sides of the first part, and c) stiffening the preform.