MODIFICATION
A -- LOW CYCLE FATIGUE TESTS
- Notice Date
- 1/9/2007
- Notice Type
- Modification
- NAICS
- 541710
— Research and Development in the Physical, Engineering, and Life Sciences
- Contracting Office
- NASA/Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135
- ZIP Code
- 44135
- Solicitation Number
- NNC07181654Q
- Response Due
- 1/15/2007
- Archive Date
- 1/9/2008
- Point of Contact
- Bernadette J. Kan, Purchasing Agent, Phone (216) 433-2525, Fax (216) 433-2480, Email Bernadette.J.Kan@grc.nasa.gov
- E-Mail Address
-
Bernadette J. Kan
(Bernadette.J.Kan@grc.nasa.gov)
- Small Business Set-Aside
- Total Small Business
- Description
- THIS NOTICE CONSTITUTES AMENDMENT NO. 1 TO THE COMBINED SYNOPSIS/RFQ FOR LOW CYCLE FATIGUE TESTS. Companies shall acknowledge all amendment(s) in their quote. This notice serves as the official amendment to subject synopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to provide answers to questions as follows: Q.) Can you give a rough idea of schedule, i.e. when would the first samples be made available for testing? A.) All specimens could be shipped for testing in the next 2 months. Q.) Will NASA provide the specimens for testing? A.) Yes. Q.) What heat treatment is required and who will do it? A.) None required. Q.)If we are to do the HT do you want it done on finished specimens or on specimen blanks? A.) None required. Q.) Two drawings are specified. Does the vendor have a choice as to which to employ, or are different ones to be used for different tests? A.) No. Q.) If the customer is to provide specimens why have two drawing been provided? A.) NASA will send specimens of either of the two drawings. Q.) Is this primarily a program to develop S-N (or Strain-N) data or are you interested in endurance limits or in the statistical distribution of the results? A.) Need the elastic modulus, maximum, minimum, elastic, plastic, total strains; maximum, minimum stresses at the start and at half life, as well as initiation and separation lives. NASA will want a runout life, to stop tests still going. Q.) Should the extensometers be diametral (i.e. monitor radial strain) or longitudinal (over a gage length?) A.) Longitudinal. Q.) No test matrix was specified. Does the vendor have the choice of the distribution of specimens between temperatures and Strain/stress ranges or will the customer specify it? A.) NASA will specify, so a., b., c. below won’t apply. a. Are you more interested in data from many temperatures or for more strains at each temperature? b. Do you want duplicate tests run and if so how many for each group? c. Should we specify a preliminary matrix based on the answers to questions 5, 6a and 6b? Q.) Has any provision been made to insure that when switching from 0.5 Hz in strain control to 10Hz in load control (for the same load range), that the hysteresis loop width is not significantly decreased? A.) Just need to match maximum and minimum stresses generated at the end of the 0.5 Hz strain control test interval. Q.) If an asymmetric hysteresis loop develops in the stabilized strain controlled loops (different tensile and compressive maximum stresses), should the vendor use these asymmetric stresses for the load controlled testing? A.) Yes. Q.) Periodic hysteresis loops are requested. When the specimens have shifted to load control at 10Hz, does the customer want the cycling to be stopped periodically and then 0.5Hz hysteresis loops drawn using load control, with the same load range as was being used in the 10 Hz tests. Alternatively, it might be possible to use an oscilloscope to get 10Hz hysteresis loops. A.) No need for loops during load control 10 Hz testing. Q.) 70 tests were specified. To do 70 successful tests will require more than 70 specimens as some tests will experience machine failures and the results from these tests will not be invalid. Will more than 70 specimens be supplied and if not what provisions will be made for make-up tests? A.) NASA has reserve spares. Q.) Some tests are to be interrupted prior to failure. Who will decide which tests are to be interrupted? A.) NASA will specify. Q.) The low strain (long life) tests are to be run under load control. What about the tests run at higher strains, where failure occurs in a reasonable time at 0.5Hz? Do you also want these tests to be switched to load control? If not some tests will be run under strain control and some under load control. However, switching higher strain tests presents problems, as it is more likely that the strain at 10 Hz will be different from that at 0.5Hz. A.) NASA will run 0.5 Hz strain control tests for 24 hours, then switch to load control with the extensometer removed if they have not failed at that point. A.) As in any test programs, there may be some specimens which yield incomplete data (e.g. test interruption due to power failure, testing failures), will they be part of the data package provided to and paid for by NASA? A.) Send any data generated and specimen from ruined test, but will test replacement specimen at no additional cost. Q.) Prior to start of testing, will there be a discussion between the contractor and the NASA project leaders on the overall test program, its objectives, the test matrix and test plan so that all parties understand what is expected? A.) Yes. The due date for receipt of offers is not extended. Companies shall provide the information stated in the synopsis/RFQ posted on the NASA Acquisition Internet Service (NAIS) on 1/15/2007. Documents related to this procurement are available over the Internet. These documents reside on a World Wide Web (WWW) server which may be accessed using a WWW browser application. The Internet site, or URL, for the NASA/GRC Business Opportunities home page is http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=22 NOTE: THIS NOTICE WAS NOT POSTED TO FEDBIZOPPS ON THE DATE INDICATED IN THE NOTICE ITSELF (09-JAN-2007); HOWEVER, IT DID APPEAR IN THE FEDBIZOPPS FTP FEED ON THIS DATE. PLEASE CONTACT fbo.support@gsa.gov REGARDING THIS ISSUE.
- Web Link
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- Record
- SN01208346-F 20070111/070109223107 (fbodaily.com)
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