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If you have problems to login or download (especially in Internet Explorer) this may be due to too high privacy (cookie) settings in your browser. Sometimes using Firefox or Edge helps as well.
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Registration form
Please fill out all information below to to
request access to a free copy(*) of ESACRACK in the case
you are eligible to ESACRACK and/or NASGRO®. The latest
available ESACRACK version is 4.4.1 issued in 2022. This
new ESACRACK includes updated versions of ESALOAD and NASGRO
10.x and an updated ESAFATIG materials database.
* ESACRACK is in principle available free of charge within
the ESA member states. Exceptions may be granted on a case
by case basis.
Please indicate in the box at the bottom
of this form whether you require ESACRACK version 4.4.1
either with or without NASGRO 10.x or want to be informed
when a new version is released.
IMPORTANT: The ESACRACK software
package you requested may include a copy of the ESA
version of the NASGRO 10.x crack-growth software, which
is subject to specific usage
restrictions. This version of NASGRO is limited to official
use by:
All other uses of the NASGRO 10.x version distributed
by ESA are prohibited.
For users and projects which do not meet these
requirements, a commercial license for an unrestricted version
of NASGRO 10.x is available from SwRI (www.nasgro.swri.org).
NOTE: You must fill out all fields to receive your
access rights.
You will receive a confirmation e-mail with
information about downloading the software.
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In case of problems registering with this electronic form please
send a filled registration form
on paper to to the following contact:
Mr. G. Sinnema
ESA/ESTEC TEC-MSS
PO Box 299
2200AG Noordwijk ZH
The Netherlands
Fax: +31 71 5656064
Email:
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