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Shock and Vibration Testing - Elite Electronic …

Shock and Vibration Testing Agenda Shock Testing Comparison and Selection of Methods Comparison of Specs Rationale for Selection of Testing Vibration Testing Comparison and Selection of Methods Comparison of Specs Rationale for Selection of Testing . Vibration and Shock Vibration and Shock Machine Type Range Range Capabilities TIRA Vibration 20,000lb vector, 2 inch displacement 5-2500Hz 3 axis slip plate; 5 ft. x 5 ft. slip table TIRA Vibration 12,000lb vector, 2 inch displacement 5-2500Hz 3 axis slip plate; 30 in. x 30in . slip table Unholz Dicke Vibration 17,000lb vector, inch displacement 5 2500 Hz 3 axis slip plate; 36 in. x 36 in. slip table MB Corp Model C-60 Vibration 6000lb vector, 1 inch displacement 5 3000 Hz 3 axis slip plate; 30 in. x 30in . slip table Ling Vibration 6000lb vector, 1 inch displacement 5 2000 Hz 3 axis slip plate; call for size limitations Thermotron Vibration 5 Hammer Repetitive Shock 5-20,000 Hz HALT Thermal Shock with Vibration Elite Package Vibration 2 4 Hz Cam operated bounce test for transportation AVCO FF367-1 Mechanical Shock 300g s/20ms Inquire Sine or saw-tooth AVCO A105 Mechanical Shock 30,000g Inquire Sine or saw-tooth Schaevitz G-6-A Acceleration Limited by 3 ft.

Agenda Shock Testing Comparison and Selection of Methods Comparison of Specs Rationale for Selection of Testing Vibration Testing Comparison and Selection of …

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Transcription of Shock and Vibration Testing - Elite Electronic …

1 Shock and Vibration Testing Agenda Shock Testing Comparison and Selection of Methods Comparison of Specs Rationale for Selection of Testing Vibration Testing Comparison and Selection of Methods Comparison of Specs Rationale for Selection of Testing . Vibration and Shock Vibration and Shock Machine Type Range Range Capabilities TIRA Vibration 20,000lb vector, 2 inch displacement 5-2500Hz 3 axis slip plate; 5 ft. x 5 ft. slip table TIRA Vibration 12,000lb vector, 2 inch displacement 5-2500Hz 3 axis slip plate; 30 in. x 30in . slip table Unholz Dicke Vibration 17,000lb vector, inch displacement 5 2500 Hz 3 axis slip plate; 36 in. x 36 in. slip table MB Corp Model C-60 Vibration 6000lb vector, 1 inch displacement 5 3000 Hz 3 axis slip plate; 30 in. x 30in . slip table Ling Vibration 6000lb vector, 1 inch displacement 5 2000 Hz 3 axis slip plate; call for size limitations Thermotron Vibration 5 Hammer Repetitive Shock 5-20,000 Hz HALT Thermal Shock with Vibration Elite Package Vibration 2 4 Hz Cam operated bounce test for transportation AVCO FF367-1 Mechanical Shock 300g s/20ms Inquire Sine or saw-tooth AVCO A105 Mechanical Shock 30,000g Inquire Sine or saw-tooth Schaevitz G-6-A Acceleration Limited by 3 ft.

2 Arm; Call for size Vibration and Shock Vibration and Shock HALT Test Vibration Impactors Heating Elements Vibration and Shock HALT/HASS Chamber HALT -Highly Accelerated Life Testing Combined six-axis Vibration and temperature extremes. Intentionally but systematically produces test item failures for the purpose of rapidly identifying mechanical, electrical, design and functional weak points. Design weaknesses can be analyzed, corrected, and the product design optimized. HASS -Highly Accelerated Stress Screening Overstress test to identify marginal or defective products before shipment. HASS test levels are identified during HALT and are established to compress test time without damaging the product or reducing its life. Vibration and Shock Elite HALT/HASS Chamber Capabilities -100C to +200C (-148F to +302F) Greater than +70C per minute product temperature change rates (heating or cooling) 30 x 30 Vibration Table, 480lbs total weight capacity for test item & fixture Workspace Dimensions 42 W x 42 D x 40 H Vibration Frequency Range: 2Hz-10kHz.

3 Vibration Level: Up to 50 Grms Two (2) 3 x8 access ports, Three (3) 20 x20 viewing windows Vibration and Shock Vibration Testing Sine, Random, SOR, Field Data Replication Record actual Vibration levels Import data to Vibration controller Operate Vibration table according to recorded profile and acceleration magnitude Run test item for endurance Mechanical Shock SRS Vibration and Shock Drop Shock Sawtooth, Half-Sine Classical Shock Test Machines Vibration and Shock High G Mechanical Shock Vibration and Shock High G Constant Acceleration Vibration and Shock StressCyclesEndurance LimitStrainStressYield StrengthUltimate StrengthProportional LimitFatigue Crack Growth Vibration and Shock Sine Vibration From rotating or oscillating machinery; electric motors, wheels, engines, gears, springs. Useful for evaluating dynamic characteristics of structures, resonance Random Vibration More accurately represents the true environment.

4 Excites all frequencies Most damage occurs at fundamental frequency of electronics PCB. Vibration and Shock Shock High stresses causing fracture or permanent deformation High accelerations which can cause relays to chatter, potentiometers to slip, bolts to loosen. High displacement which can cause impact between adjacent circuit boards Usually not considered a fatigue failure if Shock quantity less than 1,000 cycles. Selecting a Vibration Level or a Shock Pulse Which Shock Pulse should I Apply? How Many? Which Level? What is the Vibration spectrum of interest? How long should I test for? the Contract Specifications Your Test Based on Existing Specifications as Guidance Field Measurements 1- Follow Contract Requirements Contract Requirements MIL-PRF-15305 Contract Requirements MIL-PRF-15305 MIL-STD-202G Method 213 2- Use Existing Specifications for Guidance Military, Regulatory, and OEM Specs Industry Standard Test Methods with Recommended Levels Create Your Own Specification Shock Test Specs & Methods Automotive FORD, GM SAE J1455 Commercial Products IEC 68-2-27; -29.

5 -31 Commercial Aviation RTCA DO 160E Section 8 Military MIL-STD-810 Systems MIL-STD-883 Circuit Cards MIL-STD-202 Components Handling Drop Classical Shock (Potholes & Crashes) Classical Shock Bump Free Fall Operational and Crash Safety Shock Sustained Shock SRS Classical Pyroshock Ballistic Shock Handling and Free Fall Drop Tests Drop Surfaces Concrete Steel Wood Sand Package or Device Typical Classical Shock Tests for Electronic Systems Reference SpecificationAmplitude and Duration Pulse ShapeQuantity MIL-STD-810F Ground Equipment 75g-6msSaw-tooth3 pulses x 3 axes x 2 Dir (18 total) ISO 16750-350g-6msHalf-Sine10 pulses x 3 axes x 2 Dir (60 total)General Motors GMW 317225g-15msHalf-Sine132 pulses x 3 axes x 2 Dir (792 total)General Motors GMW 3172100g-11msHalf-Sine3 pulses x 3 axes x 2 Dir (18 total)Ford Motor100g-10msHalf-Sine6 pulses x 3 axes x 2 Dir (32 total)RTCA DO-160D (Operational)6g-11msSaw-tooth1 pulse x 3 axes x 2 Dir (6 total)RTCA DO-160D (Crash Safety)20g-11msSaw-tooth1 pulse x 3 axes x 2 Dir (6 total)A(Gs)Time (msec)A(Gs)Time (msec)Typical Classical Shock Tests for Electronic Systems- IEC 68-2-27 GsTimeWaveComponentsEquipment General handling and based items or items transported by road, rail or air in secured Shock resistant packages3018ST, HS, TRInstalled or tranported in a secured position on normal road or rail vehicles or in transport aircraft5001 HSStructural integrity tests on semiconductors, integrated circuits, integrity tests on semiconductors, integrated circuits, , HS, TR6100 Items installed or transported in a secured position in full cross-counry vehicles.

6 Items carried loose in normal road or rail vehicles for long periods. Items used in industrial areas and subjected to Shock from mechanical handling equipment for example dock cranes, fork lift trucks. Items in secured packages transported by full cross country vehicles. Items mounted in equipment tranported by or installed in full cross country vehicles or aircraftItems in secured packages transported by wheeled vehicles, aircraft, merchant ships or light marine , HS, TR11301511ST, HS, TRElite Capability for Classical Shock Large Avco (Assume 150lb load and fixture) Short Pulse 3msec- 300Gs Long Pulse 30msec-20Gs Small Avco (Assume 50lb load and fixture) Short Pulse 1000Gs (longer pulses up to 10kGs) Long Pulse 6msec-500gs Tira Electro-dynamic Vibration Table (Assume 150lb load and fixture) Short Pulse 150Gs Long Pulse 30msec 15Gs Classical Shock Pulses Advantages Easy to specify and understand shape, tolerance, mathematics Test machinery can generate pulses Accepted methods written into many specs Disadvantages Not real world pulses Does not evaluate device response to Shock Classical Shock Tests Engine - Axis3(g's)-20-15-10-5051015 Engine - Axis2(g's)-15-10-5051015 Engine - Time(secs)020406080100 Axis1(g's)-15-10-50510 Classical Shock Tests - Time(secs)05101520 Axis3(g's)-20-15-10-5051015 Shock Response Spectrum Shock Response Spectrum Input Pulse Measured Response Shock Response Spectrum Shock Response Spectrum Shock Response Spectrum Shock Response Spectrum Preferred method for MIL-810 Describes the Peak Acceleration Response vs.

7 Freq Develop a simple Shock pulse that will generate the response function Some ED shakers have SRS capabilities Ringing plates Pyrotechnic Shock Pyrotechnic Shock Pyrotechnic Shock Pyrotechnic Shock Ballistic Shock Custom Shock Evaluation ASTM D3332 Damage Boundary Response to short duration pulse is a function of velocity change. Response to long duration pulse is a function of the peak acceleration and waveform. MIL-810 Fragility Test Vibration and Shock Summary the Contract Specifications Your Test Based on Existing Specifications as Guidance Field Measurements us with your application needs. Thank you for this opportunity to serve you.


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