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MIL-STD Standard Different Testing Equipment Should Meet

MIL-STD Shock Testing Standard


  • MIL-STD-810 Shock Testing Standard

Shock tests are performed to provide a degree of confidence that materiel can physically and functionally withstand the relatively infrequent, non-repetitive shocks encountered in handling, transportation, and service environments. This may include an assessment of the overall material system integrity for safety purposes in any one or all of the handling, transportation, and service environments.


  • MIL-STD-883 Shock Testing Standard

The shock test is intended to determine the suitability of the devices for use in electronic equipment which may be subjected to moderately severe shocks as a result of suddenly applied forces or abrupt changes in motion produced by rough handling, transportation, or field operation. Shocks of this type may disturb operating characteristics or cause damage similar to that resulting from excessive vibration, particularly if the shock pulses are repetitive.


  • MIL-STD-202 Shock Testing Standard

MIL-STD-202 Test Method 213 This test is conducted for the purpose of determining the suitability of component parts and subassemblies of electrical and electronic components when subjected to shocks such as those which may be expected as a result of rough handling, transportation, and military operations. This test differs from other shock tests in this standard in that the design of the shock machine is not specified, but the half-sine and sawtooth shock pulse waveforms are specified with tolerances. The frequency response of the measuring system is also specified with tolerances.


  • MIL-STD-750 Shock Testing Standard

MIL-STD-750 METHOD 2016.2 This test method is intended to determine the ability of the semiconductor devices to withstand moderately severe shocks such as would be produced by rough handling, transportation, or field operation. Shocks of this type may disturb operating characteristics or cause damage similar to that resulting from excessive vibration, particularly if the shock pulses are repetitive.


  • MIL-S-901  Shock Testing Standard

The MIL-S-901D specification covers shock testing requirements for shipboard machinery, equipment, systems, and structures, excluding submarine pressure hull penetrations. The purpose of these requirements is to verify the ability of shipboard installations to withstand shock loadings that may be incurred during wartime service due to the effects of nuclear or conventional weapons. -Lightweight. The lightweight test is a test performed on the lightweight shock machine. The weight of the test item including the fixture to attach it to the test machine shall be less than 550 pounds.


Medium weight. The medium weight test is a test performed on the medium weight shock machine. The weight of the test item including the fixture to attach it to the test machine shall be less than 7,400 pounds.


MIL-STD Vibration Testing Standards


  • MIL-STD-810 Vibration Testing Standard

Vibration tests are performed to develop materiel to function in and withstand the vibration exposures of a life cycle including synergistic effects of other environmental factors, materiel duty cycle, and maintenance. This method is limited to consideration of one mechanical degree of freedom at a time.    

       

Verify that materiel will function in and withstand the vibration exposures of a life cycle.


  • MIL-STD-883 Vibration Testing Standard

This test is conducted for the purpose of determining the ability of the microcircuit; to withstand the dynamic stress exerted by random vibration applied between upper and lower frequency limits to simulate the vibration experienced in various service-field environments. Random vibration is more characteristic of modern-field environments produced by missiles, high-thrust jets, and rocket engines. In these types of environments, random vibration provides a more realistic test. For design purposes, however, a swept frequency sinusoidal test may yield more pertinent design information.


  • MIL-STD-202 Vibration Testing Standard

MIL-STD-202 Test Method 201 The vibration test is used to determine the effects on component parts of vibration within the predominant frequency ranges and magnitudes that may be encountered during field service. Most vibration encountered in field service is not of a simple harmonic nature, but tests based on vibrations of this type have proved satisfactory for determining critical frequencies, modes of vibration and other data necessary for planning protective steps against the effects of undue vibration. Vibration, by causing loosening of parts or relative motion between parts in the specimen, can produce objectionable operating characteristics, noise, wear, and physical distortion, and often results in fatigue and failure of mechanical parts. 


  • MIL-STD-750 Vibration Testing Standard

MIL-STD-750 METHOD 2056.3 VIBRATION, VARIABLE FREQUENCY 

1. The variable-frequency vibration test method is performed for the purpose of determining the effect on semiconductor devices of vibration in the specified frequency range.

2. Apparatus. Equipment used in this test method shall be capable of demonstrating device conformance to the requirements of the performance specification sheet or acquisition document.

3. Procedure.

3.1 Mounting. The device shall be rigidly fastened on the vibration platform and the leads or cables adequately

secured.

3.2 Amplitude. The device shall be vibrated with simple harmonic motion having either a peak to peak amplitude

of 0.06 inch (±10 percent) or a peak acceleration of 20 g minimum (+20 percent, –0 percent). Test conditions shall

be amplitude controlled below the crossover frequency and g level controlled above.

3.2.1 Frequency range. The vibration frequency shall be varied approximately logarithmically between 20 and

2,000 Hz.

3.2.2 Sweep time and duration. The entire frequency range of 20 to 2,000 Hz and return to 20 Hz shall be

traversed in not less than four minutes. This cycle shall be performed 4 times in each of the orientations X, Y, and Z

(a total of 12 times), so that the motion shall be applied for a total period of approximately 48 minutes.


  • MIL-STD-167-1 Vibration Testing Standard

Vibration tests shall be made by means of any testing machine capable of meeting the conditions specified in 5.1.2.4, and the additional requirements contained herein. Means shall be provided for controlling the direction of vibration of the testing machine and for adjusting and measuring its frequencies and amplitude of vibration to keep them within prescribed limits. It is acceptable to utilize different machines for the vertical and horizontal directions. The testing machine, including the table, actuator, and attachment fixtures, shall be rigid within the frequency range to be tested. This includes test fixture resonances that may result from an interaction between the table and mounted equipment.   

                        

5.1.2.4 Vibration tests. Each of the tests specified herein shall be conducted separately in each of the three principal directions of vibration. All tests in one direction shall be completed before proceeding to tests in another direction. The equipment shall be secured to the vibration table as specified in 5.1.2.3. If major damage (see 5.1.1) occurs, the test shall be discontinued and the entire test shall be repeated following repairs or correction of deficiencies. 


MIL-STD Constant Acceleration Testing Standards


  • MIL-STD-810 Constant Acceleration Testing Standard

The acceleration test is performed to assure that material can structurally withstand the steady-state inertia loads that are induced by platform acceleration, deceleration, and maneuver in the service environment, and function without degradation during and following exposure to these forces. Acceleration tests are also used to assure that material does not become hazardous after exposure to crash inertia loads.


  • MIL-STD-883 Constant Acceleration Testing Standard

This test is used to determine the effects of constant acceleration on microelectronic devices. It is an accelerated test designed to indicate types of structural and mechanical weaknesses not necessarily detected in shock and vibration tests. It may be used as a high-stress test to determine the mechanical limits of the package, internal metallization, lead system, die or substrate attachment, and other elements of the microelectronic device. By establishing proper stress levels, it may also be employed as an in-line 100 percent screen to detect and eliminate devices with lower than nominal mechanical strengths in any of the structural elements.


  • MIL-STD-202 Constant Acceleration Testing Standard

MIL-STD-202 Test Method 212 This test is performed for the purpose of determining the effects of acceleration stress on component parts, and to verify the ability of the component parts to operate properly during exposure to acceleration stress such as would be experienced in aircraft, missiles, etc. Unless otherwise specified, the acceleration test apparatus shall be the centrifuge-type and shall be capable of subjecting the test specimen to the value of acceleration (g’s) as specified in. 


  • MIL-STD-750 Constant Acceleration Testing Standard

MIL-STD-750 Method 2006 Constant acceleration                        

1. Purpose. The constant acceleration test is used to determine the effect on semiconductor devices of a centrifugal force. This test is an accelerated test designed to indicate types of structural and mechanical weaknesses not necessarily detected in shock and vibration tests.

2. Apparatus. Constant acceleration tests shall be made on an apparatus capable of meeting the minimum requirements of the individual specification sheets.

3. Procedure. The device shall be restrained by its case, or by normal mountings, and the leads or cables secured. Centrifugal acceleration of the value specified shall then be applied to the device for one minute in each of the orientations X1, X2, Y1, Y2, Z1, and Z2. The acceleration shall be increased gradually, to the value specified, in not less than 20 seconds. The acceleration shall be decreased gradually to zero in not less than 20 seconds.



MIL-STD Transportation Testing Standard


  • MIL-STD-810 Transportation Testing Standard

Vibration testing per MIL-STD-810 Method 514 Procedure II “Loose Cargo Transportation”. During this vibration test, products are subjected to vibration profiles developed to simulate truck and rail shipments. The test severity, in particular, is for loose cargo transport in military vehicles traversing rough terrain. 


MIL-STD Drop Testing Standards


  • MIL-STD-202 Drop Testing Standard

MIL-STD-202 Test Method 203 The random-drop test is used to determine the effects on component parts of random, repeated impact due to handling, shipping, and other field service conditions. The test is an accelerated test designed to indicate structural and mechanical weaknesses of types not necessarily detected in shock and vibration tests. 


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