Researchers Measure Elasticity of Stored Wenge Wood
Ultrasonic testing reveals physical asymmetries in long-term stored wenge wood samples.
Updated on Oct. 28, 2026 in Materials Science
Researchers have determined the elasticity and shear moduli of wenge wood samples that have been in indoor storage since 2011. The study utilized ultrasonic wave propagation to identify significant physical asymmetries within the material.
Why it matters
The findings address a notable gap in existing literature regarding the material properties of wenge wood over extended storage periods. Understanding these internal variations helps clarify how long-term aging impacts the structural performance of dense tropical hardwoods.
The study analyzed 14 defect-free samples with an average density of 942 kg/m³, using 2.25 MHz longitudinal and 1 MHz shear contact transducers. Results showed longitudinal elasticity moduli reaching 19.608 GPa and significant shear modulus variations, including a 34.9% difference between specific directional constants.
The details
The samples were acclimatized at 20 °C and 65% relative humidity to ensure constant weight before testing. Linear regression analysis indicated that wood density does not have a consistent relationship with elastic constants, highlighting the complexity of wenge wood structures.
Timeline
Wenge wood samples were placed into indoor storage beginning in June 2011.
The study findings were published in the journal Nature in October 2026.
The Big Picture
This study shifts the trajectory of timber research by refining the accuracy of elastic constant measurements for aged tropical hardwoods. It updates the data previously established by the ISO 13061-1 standards regarding wood physical and mechanical properties.
The study could lead to more precise modeling for manufacturers who use wenge wood in high-stress applications or historical furniture restoration. Improved knowledge of elasticity variations allows for better material selection and structural safety in future wood-based engineering products.
The takeaway
These findings underscore that density alone is an insufficient predictor for the mechanical integrity of aged tropical wood. Designers and engineers should prioritize ultrasonic testing to account for internal material asymmetries when working with long-stored timber.
Further reading
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Source note: This article includes information reported by Nature.
