Si buscas esta expresión completa en Internet, encontrarás muchos resultados iguales al que te doy, especialmente en el campo de los plásticos.

Te pongo aquí algunas de las cosas que he encontrado, en inglés y español

Mira especialmente esta URL:
http://www.multi-wing.com/spanish/materials.htm

Además:
Resilienza – resistenza a rottura dinamica da urto. (construcc.)
Impact strength
Resistenza all’urto, capacità di resistere ad urti improvvisi (constr. Tecnología mecánica)
Impact resistance, impact strength.

Giorgio Marolli Dizionario tecnico

Eurodicautom:
Izod impact test
ensayo de impacto Izod
Reference CSIC


Izod test
Ensayo Izod
the test consist of measuring the energy absorbed in breaking a notched test piece by one blow from a striker carried by a pendulum.The standard test piece has a square or circular section and one,two or three notches;it is supported at one end as a cantilever
Reference ATF dic.idéologique de fonderie (1)
TERM Izod test
Reference ATF dic.idéologique de fonderie

http://crtlabs.com/izodimpact.html

Izod Impact (ASTM D 256):

What is a Notched Izod Impact Test?
Notched Izod Impact is a test of how impact resistant a polymer will be. This is useful information when the application is for high impact performance. A sample is place in the clamping zone so that it is cantilevered upward with the notch facing the direction of impact. The pendulum is released and the force required to break the specimen is calculated from the height the pendulum reaches the follow-through.
The Izod Impact test is a measurement from energy used to break a notch in the specimens. It's usually calculated in units of ft./lb.-in. and is tested at room, cold or elevated temperatures. The Izod factor is useful in comparing various types of resins and/or compounds. In comparing one plastic with another, the Izod test should not be considered the absolute strength value, because the sensitivity of some materials may produce erroneous results. Nylons, Polycarbonates and Acetal material are know to be sensitive-notch materials. The Izod test may indicate the need for revising of the mold for sharp edges for corners that would have an adverse effect on the strength behavior of the molded part.
Specimens: 1/8" thick x 1/2" wide x 2-1/2" long.


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Note added at 2002-02-07 10:07:38 (GMT)
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http://www.multi-wing.com/spanish/materials.htm

Polipropilene reforzado con fibra de vidrio
Resistencia al impacto Izod muescada:

http://www.kydex.com/spain/compounds/news.html

El nuevo compuesto cumple con los requisitos estrictos de inflamabilidad de: UL 94 V-0/5V y FAR 25.853,a. Tiene una resistencia al impacto (Izod, con entalla) de 953 J/m, una resistencia a la tracción de 45 N/mm2, una resistencia a la flexión de 65 N/mm2 y un módulo de elasticidad de 2245 N/mm2. Es resistente a una amplia gama de productos químicos corrosivos y de productos de petróleo.

http://www.redhucyt.oas.org/MERCOCYT/mercocyt/proyectosCB/pv...

- La resistencia al impacto y a la fractura se evaluará por medio de la prueba de impacto \"Izod\", mientras que las pruebas de tensión con pre-grietas se evaluarán en una máquina de pruebas universal.


http://www.siesa.com.mx/prods00b.htm

Resistencia del impacto IZOD (ASTM-D256) p/lb x\" de corte. (Prueba del grueso - 1/8\" excepto 1/4\" para la varilla)