MIL-STD-322B

Abstract

This standard has a two-fold purpose, establishing tests and procedures which electrically initiated explosive components must pass as well as characterizing electroexplosive device (EED) designs. <br>This standard applies to electrically initiated explosive components prior to completion of development. <br>A Fortran IV computer program, which fits a Weibull response function to data from either a Bruceton or OSTR conducted test, is available at ARDC, AMCCOM, DRSMC-LCS-E(D), Dover, NJ. Point and confidence interval estimates of percentage points and reliabilities (or response probabilities) are also provided by the program. <b><u>Intended Use:</u></b> The purpose of this standard is to standardize the design and conduct of tests for assessing the ability of explosive components to withstand environmental stresses they will encounter during their life cycle, and to insure that plans and test results are adequately documented. <a name="QCWPDAAAAAAAAAAA-X47" id="QCWPDAAAAAAAAAAA-X47"><img alt="FIGURE 1. TWELVE METER DROP TEST FIXTURE" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X48" id="QCWPDAAAAAAAAAAA-X48"><img alt="FIGURE 2. BLOCK" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X49" id="QCWPDAAAAAAAAAAA-X49"><img alt="FIGURE 3. CLAMP" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X50" id="QCWPDAAAAAAAAAAA-X50"><img alt="FIGURE 4. Nest" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X51" id="QCWPDAAAAAAAAAAA-X51"><img alt="FIGURE 5. STUD, BUSHING, SCREW CLAMPING, HOLDER" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X52" id="QCWPDAAAAAAAAAAA-X52"><img alt="FIGURE 6. STATIC ELECTRICITY TEST FIXTURE" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X53" id="QCWPDAAAAAAAAAAA-X53"><img alt="FIGURE 7. WIRING DIAGRAM & CONDENSER HOLDER" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X54" id="QCWPDAAAAAAAAAAA-X54"><img alt="FIGURE 8 TEST RECORD" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X55" id="QCWPDAAAAAAAAAAA-X55"><img alt="FIGURE 8. TEST RECORD (Cont'd)" src="" /></a> <a name="QCWPDAAAAAAAAAAA-X56" id="QCWPDAAAAAAAAAAA-X56">TABLE I. SAMPLE SIZE REQUIRED FOR RELIABILITY ESTIMATES AT GIVEN CONFIDENCE LEVELS</a> <pre>Number Point Sample of Reliability <u> Size </u> <u>Failures</u> <u> Estimate </u> <u>Lower Reliability Confidence Level </u> <u>.99</u> <u>.95</u> <u>.90</u> <u>.85</u> 100 0 1.00 .952 .970 .977 .982 1 .99 .935 .957 .962 .968 2 .98 .915 .938 .948 .954 150 0 1.00 .969 .980 .985 .988 1 .993 .956 .969 .974 .978 2 .987 .944 .958 .965 .968 200 0 1.00 .976 .985 .989 .991 1 .995 .968 .977 .981 .983 2 .99. .958 .968 .973 .977 230 0 1.00 .979 .987 .991 .992 1 .996 .972 .980 .983 .985 2 .992 .964 .973 .977 .980 250 0 1.00 .981 .988 .991 .993 1 .996 .974 .981 .985 .987 2 .992 .966 .975 .979 .981 275 0 1.00 .983 .989 .992 .993 1 .996 .977 .983 .986 .988 2 .993 .970 .978 .982 .983 300 0 1.00 .984 .990 .992 .994 1 .997 .978 .985 .987 .989 2 .993 .972 .979 .982 .985 350 0 1.00 .987 .991 .993 .995 1 .997 .981 .987 .989 .990 2 .994 .976 .982 .985 .987 385 0 1.00 .988 .992 .994 .995 1 .997 .983 .988 .990 .991 2 .995 .978 .984 .986 .988</pre> <br>