Formability Limits in Square Tubes and L-Section Profiles
Inês M. Almeida, João P. G. Magrinho, Maria Beatriz Silva
TL;DR
This paper studies how square tubes and L-section profiles deform and break during manufacturing, offering new methods to improve their design and performance.
Contribution
A novel methodology combining DIC with time-dependent analysis and thickness measurements is introduced to assess formability limits.
Findings
Geometry significantly influences fracture mechanisms in square tubes and L-section profiles.
Forming limit points and fracture lines were determined for different strain paths leading to failure.
The approach provides data to optimize tube-forming processes for lightweight structural components.
Abstract
Understanding the formability limits of thin-walled tubes with square cross-sections and L-section profiles is crucial for improving manufacturing efficiency and ensuring structural reliability in industries such as automotive and aerospace. Unlike the usually studied circular tubes, square tubes and L-section profiles geometries present unique deformation and fracture behaviours that require specific analysis. To address this gap, this research establishes a novel methodology combining digital image correlation (DIC) with a time-dependent approach and precise thickness measurements, enabling accurate strain measurements essential to the onset of necking and fracture strain identification. Two experimental tests under different forming conditions allowed capturing a distinct range of strain paths leading to failure. This approach allowed the determination of the forming limit points…
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Taxonomy
TopicsMetal Forming Simulation Techniques · Metallurgy and Material Forming · Mechanical stress and fatigue analysis