Acceleration Testing Services
Acceleration testing is used to measure the effects of rising gravity loads caused by constant acceleration, primarily in the aircraft industry. The testing process involves gradually applying and maintaining long-lasting acceleration forces while taking various factors into account. Acceleration testing is necessary to avoid negative impacts such as deflections, fractures, and broken supports. It is essential to ensure the safety and reliability of materials and components.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Acceleration Testing Overview
Acceleration testing measures how materials, components, and assemblies respond to sustained g-force loads. The test is designed to replicate inertial forces generated during constant acceleration — conditions that arise regularly in aerospace, defence, and high-performance applications. A controlled centrifugal or linear force is applied at a defined level for a defined duration, and the specimen is evaluated for any structural or functional change.
The process involves ramping up to the required g-level, holding it for the specified duration, and observing the specimen for deflections, fractures, broken supports, connector separation, or loss of function. These are the failure modes that matter in high-g environments — and they won’t show up in a standard static test.
For anything that gets mounted in an aircraft, missile, launch vehicle, or rotating machine, acceleration testing is not optional. Sustained g-loads are part of normal operation in these environments, and failures under those conditions are rarely recoverable.
Acceleration Testing Scope, Applications, and Benefits
Scope
Acceleration testing involves evaluating materials, components, and assemblies under sustained g-loads, expressed as multiples of gravitational acceleration. Testing is performed on centrifuge systems capable of holding steady-state g from low single digits to several hundred g, depending on the specimen and requirement. The test profile — peak g-level, ramp rate, hold duration, and loading axis — is set based on the applicable standard or the client’s test plan.
Commonly referenced standards include:
- MIL-STD-202 — electronic components under sustained acceleration
- MIL-STD-810 — environmental testing for military equipment, including centrifugation
- IEC 60068-2-7 — steady-state acceleration for electrotechnical products
- Customer-specific test plans — for materials characterisation or structural evaluation outside standard scope
Applications
- Aerospace and defence — avionics, structural components, fasteners, and actuators that operate within a sustained high-g flight envelope
- Space and launch vehicles — satellite components and payload hardware subjected to acceleration forces during launch and staging
- Automotive and motorsport — sensors, ECUs, and mechanical assemblies in vehicles where sustained cornering or crash forces are a real concern
- Military electronics — PCBs, connectors, and housings that need to meet MIL-STD g-level requirements
- Rotating machinery — bearings, impellers, and rotor assemblies that run under continuous centrifugal loading
- Medical devices — portable or implantable devices that may experience acceleration events during use or transport
Benefits
- Finds structural weaknesses before the product reaches the field — deflections, fractures, and mechanical failures that don’t appear under static conditions will show up here
- Replicates actual operating loads — sustained acceleration profiles are a much closer match to real flight or high-speed conditions than any extrapolated estimate
- Wide g-range coverage — centrifuge systems can test from a few g up to several hundred g, covering both commercial and defence requirements in the same setup
- Directly informs design decisions — data on where things fail guides material selection, joint design, and mounting configurations
- Reduces late-stage risk — catching weak supports or insufficient material strength at the test stage is far cheaper than finding it in service
Acceleration Testing Test Process
Test Planning
Define the acceleration profile, including g-level, axis, duration, and ramp rate. Design fixtures to secure and orient the specimen correctly.
1Specimen Mounting
Mount the specimen on the centrifuge fixture and complete baseline visual, electrical, or functional checks if required.
2Acceleration Testing
Run the centrifuge to the specified g-level, hold for the required duration, and repeat across axes as needed.
3Inspection and Reporting
Inspect the specimen for damage or deformation, verify functionality if applicable, and document results against acceptance criteria.
4Acceleration Testing Technical Specifications
| Parameter | Details |
|---|---|
| Test Type | Sustained / steady-state acceleration (centrifugal) |
| Acceleration Range | Typically 1 g to 500+ g, depending on equipment and requirement |
| Loading Axis | Single-axis or multi-axis sequential per test plan |
| Test Duration | As specified, seconds to several hours for endurance profiles |
| Applicable Standards | MIL-STD-202, MIL-STD-810, IEC 60068-2-7, customer-specific plans |
| Specimen Types | Components, PCBs, assemblies, structural parts, material coupons |
| Monitored Parameters | Dimensional change, functional performance, and electrical continuity (where applicable) |
| Reported Output | Peak g achieved, hold duration, failure mode, and location if applicable, pre/post functional status |
| Test Environment | Ambient unless otherwise specified |
Instrumentation Used for Acceleration Testing
- Centrifuge system (variable speed, multi-capacity)
- Precision fixtures and specimen mounting hardware
- Accelerometers and data acquisition system
- Strain gauges for structural deformation monitoring (where applicable)
- High-speed camera or optical monitoring for visual failure detection
- Electrical test equipment for functional verification of active components
Acceleration Testing Results and Deliverables
- Test report — test profile, peak g-level, hold duration, loading axis, and specimen condition before and after
- Pass/fail determination — post-test findings compared against specified acceptance criteria
- Failure analysis summary — failure mode, location, and probable cause if the specimen does not pass
- Pre- and post-test functional data — performance records for active or functional assemblies
- Raw data records — accelerometer readings, timing logs, and any strain or displacement data from the run
- Photographic documentation — visual records of specimen condition at key stages
Frequently Asked Questions
It helps determine whether a specimen can withstand forces caused by launch, flight, vehicle motion, handling, or other high-acceleration environments.
A g-level represents acceleration relative to Earth’s gravity. For example, 10 g means the specimen experiences ten times normal gravitational force.
A specimen is mounted on a centrifuge or acceleration test system and exposed to a defined g-level, direction, and duration.
The axis determines the direction of the applied load. A product may respond differently when acceleration is applied in X, Y, or Z directions.
Yes. If the specimen has weak joints, poor mounting, loose components, or structural defects, acceleration loading can cause damage or failure.
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