SHOCK

Shock testing determines the ability of equipment to withstand the infrequent non-repetitive shocks encountered in handling, transportation, and service and to continue to function, where required. Also, shock tests verify that equipment will not detach from its mounting during these tests.

Shock testing in the laboratory can take two approaches. Simulation of either the specified shock conditions or the response of the system as measured in the field, known as a shock response spectrum (SRS), can be performed. The most common type of specified input simulation is known as classical shock testing. It consists of inputting various relatively non-complex waveforms such as rectangular, saw-tooth and half-sine. When testing is required to produce a shock pulse having a spectrum tailored to that of the actual measured environment, shock response spectrum simulation is performed.

The following sections provide further information on operational shocks and crash safety, ballistic shock, and high impact shock.

OPERATIONAL SHOCKS AND CRASH SAFETY
The operational shock test verifies that the equipment will continue to function within performance standards after exposure to shocks experienced, for example, during normal aircraft operations. These shocks may occur during taxiing, landing or when the aircraft encounters sudden gusts in flight. This test applies to all equipment installed on fixed-wing aircraft and helicopters.

The crash safety test verifies that equipment will not detach from its mountings or separate in a manner that presents a hazard during an emergency landing. It applies, for example, to equipment installed in compartments and other areas of an aircraft where equipment if detached during emergency landing, could present a hazard to occupants, fuels systems or emergency evacuation equipment.

BALLISTIC SHOCK
Ballistic shock is a high-level generally single pulse shock, that results from the reaction loads of the firing of projectiles and ordnance. The test provides confidence that material can structurally and functionally withstand the shock effects caused by the high reaction loads on a structural configuration to which the material is mounted.

HI-IMPACT SHOCK
This test is performed to determine the ability of items to withstand shock such as produced by underwater explosions, collision impacts, near-miss gunfire, blasts caused by air explosions, handling, train coupling loads, etc. Shock testing provides confidence that material can physically and functionally withstand the relatively infrequent, non-repetitive shocks encountered in the service environments.

Shock testing is specified in the following:

MIL-PRF-27, MIL-T-27, MIL-STD-202, MIL-J-641, MIL-STD-750, MIL-STD-798, MIL-STD-810, MIL-STD-901, MIL-I-983, MIL-STD-1344, MIL-E-2036, MIL-S-3928, MIL-S-4456, MIL-E-5272, MIL-E-5400, MIL-T-5422, MIL-T-7743, MIL-M-7969, MIL-E-8189, MIL-C-8384, MIL-F-8615, MIL-S-8805, MIL-M-10304, MIL-C-11015, MIL-R-11050, MIL-R-11539, MIL-R-12934, MIL-F-13926, MIL-R-15109, MIL-C-15240, MIL-C-15305, MIL-C-15514, MIL-C-15730, MIL-F-15733, MIL-P-15736, MIL-S-15743, MIL-D-15877, MIL-S-16036, MIL-H-16313, MIL-F-16377, MIL-E-16400, MIL-V-16556, MIL-R-16999, MIL-S-17000, MIL-M-17059, MIL-M-17060, MIL-T-17113, MIL-M-17185, MIL-T-17185, MIL-T-17275, MIL-T-17293, MIL-T-17301, MIL-V-17360, MIL-V-17361, MIL-V-17456, MIL-V-17639, MIL-V-17840, MIL-P-17869, MIL-V-18110, MIL-F-18327, MIL-T-18404, MIL-P-18472, MIL-R-18546, MIL-V-18683, MIL-H-18766, MIL-F-18870, MIL-F-18953, MIL-I-18997, MIL-F-19004, MIL-M-19097, MIL-E-19100, MIL-P-19131, MIL-M-19160, MIL-M-19633, MIL-H-19760, MIL-N-19900, MIL-I-20037, MIL-S-20708, MIL-C-21097, MIL-R-21098, MIL-D-21625, MIL-V-22052, MIL-V-22133, MIL-C-22317, MIL-S-22432, MIL-C-22437, MIL-H-22594, MIL-V-22687, MIL-S-22885, MIL-A-22895, MIL-B-23071, MIL-C-23200, MIL-B-23306, MIL-A-23798, MIL-A-23836, MIL-L-23886, MIL-P-23928, MIL-S-24062, MIL-E-24091, MIL-C-24095, MIL-E-24142, MIL-C-24166, MIL-L-24223, MIL-C-24308, MIL-R-24414, MIL-P-24423, MIL-V-24509, MIL-T-28800, MIL-E-39029, MIL-H-83511, MIL-S-008834, MIL-T-0014358, US COAST GUARD NO. 493, RTCA/DO-160, PPD NO. 802-6335704, PPD NO. 802-7651312, NAVSEA NO. 802-6215945, VDID 2012, GR-487-CORE, ASTM E-644-91, ASTM F1387-99, ASTM D-4003-92, SCL-7695, SCL-7722