MIL-S-45152H
TABLE VII. Extended road test. - (continued)
Surface |
Load condition |
Average speed (mph) |
Distance (miles) |
Paved road Improved gravel road |
Full load Half load Empty Full load Half load Empty |
Highway speed (see table I) 25 - 35 25 - 35 25 - 35 |
2100 1400 700 900 600 300 |
* 4.3.3.1 Patterning. High stress areas of the frame assembly shall be coated with brittle lacquer prior to the road test. The semitrailer shall be fully loaded and towed over the Belgian block test course for one cycle.
* 4.3.3.2 Strain recording. Strain gage rosettes shall be positioned in locations of high stress concentrations. The locations shall be as determined by the brittle lacquer patterning. A minimum of ten strain gages shall be used. Locations of strain gages shall include the gooseneck, the kingpin area and transverse areas. Strains shall be recorded for each of the following three cycles of the test course:
(a) |
Full load |
1 cycle |
(b) (c) |
40 to 60 percent of full load No load |
1 cycle 1 cycle |
Strain/occurence histograms shall be supplied for each strain gage for each test cycle. The actual test course shall be recorded on the histogram. Pictures indicating the position of each strain
gage shall be provided.
* 4.3.3.3 Evaluation. The ultimate, tensile and yield strengths of the gaged components shall be documented. Any strain recorded indicating stress greater than that specified in 3.6 shall be cause for rejection.
* 4.3.3.4 General design and performance characteristics verification. The equipment shall be verified as suitable for the intended use by satisfactorily completing the preceding inspections and tests. Equipment submitted for test shall contain all specified components and shall be properly adjusted and serviced for operation. Apparatus used in conjunction with the tests shall be calibrated for accuracy. In addition to the results of inspections and tests, test records shall include the following information, as applicable.
(a) Name, date(s), and location of test
(b) Description of test course and weather conditions that could affect test results
29
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business