Sonelastic
®
Systems
SA-BC Adjustable support for bars and cylinders
Pág. 5 de 24
1. Introduction
ATCP Physical Engineering equipment and products were projected and manufactured to
provide a long-lasting and top-rated performance. This Installation and Operation Manual
contains all necessary information regarding the use and maintenance of SA-BC Support.
Carefully read this manual before using the SA-BC support. Improper
use may damage the product and affect its performance.
2. Definitions
Impulse Excitation Technique:
The Impulse Excitation Technique is a non-destructive
technique to determine the elastic moduli and damping of materials by the resonance
frequencies of test specimens. ASTM E1876 is the main standard related to the Impulse
Excitation Technique.
Resonance frequencies:
Specimen natural frequencies of vibration.
Elastic modulus:
Elastic
modulus or Young’s modulus is defined as the slope of the stress
-
strain curve at the elastic region, as described by Hooke’s Law. The elastic modulus
determined by Impulse Excitation Technique is also termed as dynamic elastic modulus.
Damping:
Damping is the phenomenon by which mechanical energy is dissipated in vibration
systems and elements. It is directly linked to the presence of defects and to the material
microstructure.
3. Features and applications
SA-BC Support is an apparatus to support specimens for non-destructive characterization of
Young’s
modulus and damping of materials by Impulse Excitation Technique, in agreement
with ASTM E1876 and correlated standards. SA-BC Support was developed to be used
alongside Sonelastic
®
Systems.
SA-BC Support allows rectangular and cylindrical specimens to rest on the nodal lines of the
fundamental flexural vibration mode (for a specimen of length L, these nodal lines are 0.224L
distant from the ends). Based on the size and weight of the specimen to be tested, this
support offers a practical system to adjust the distance between the support-cables, as well
as the traction on them. SA-BC Support also allows tests based on torsional and longitudinal
vibration modes for bars and cylinders.
For greater convenience, SA-BC Support may be combined with IED Automatic Impulse
Device and Sturdy Tripod.
