Automotive components face more than vibration during vehicle operation. Temperature changes, humidity, and mechanical loads can interact, influencing how materials, connections, and assemblies perform.
Shaker testing at imat can combine vibration with controlled climatic conditions to help engineers evaluate component behavior under defined mechanical and environmental loads. But when does combined testing provide additional value compared with separate tests?
Vibration testing helps engineers evaluate the mechanical durability of automotive components under defined dynamic loads. It can reveal weaknesses in housings, mounting structures, connections, and assemblies.
However, components rarely experience vibration under constant environmental conditions.
Consider a plastic housing exposed to vibration at elevated temperatures. Changes in material stiffness may influence its mechanical response. At low temperatures, certain materials may become less flexible, potentially affecting their resistance to dynamic loads.
Similar interactions can occur at electrical connections, adhesive joints, and interfaces between materials with different thermal expansion characteristics.
A component that performs satisfactorily during vibration at room temperature may therefore behave differently under other climatic conditions.
Combined vibration and climate testing allows engineers to investigate these interactions under controlled, repeatable conditions.
The objective is not simply to increase test severity. It is to evaluate whether the combination of loads provides information relevant to the component's intended application and validation requirements.
In conventional shaker testing, a component is mounted on a vibration system and exposed to a defined mechanical load profile. Depending on the requirements, this may involve sinusoidal or random vibration, among other test methods.
Combined testing introduces controlled climatic conditions into the setup.
By integrating a shaker system with a climate chamber, engineers can investigate component behavior during vibration at specified temperatures. Humidity may also be controlled where the equipment and test configuration support it.
This makes it possible to assess selected interactions between mechanical and environmental loads rather than examining each influence exclusively in separate tests.
For example, a validation program may investigate whether a component maintains its mechanical integrity and electrical functionality during vibration at elevated temperatures.
The test conditions must be selected according to the component, applicable specifications, and technical objectives.
Interested in the available testing options?
The value of combined testing depends on whether climatic conditions can influence the component's response to vibration.
Three areas are particularly relevant.
Temperature can affect the stiffness, flexibility, and dimensional stability of materials.
For components containing polymers, elastomers, or adhesives, these changes may influence how mechanical loads are transferred through the assembly.
Combined testing can help engineers investigate whether such temperature-dependent behavior affects component performance during vibration.
Automotive assemblies often combine materials with different thermal expansion characteristics.
Temperature changes may introduce stresses at mechanical interfaces, bonded joints, or electrical connections. When vibration is applied simultaneously, these interfaces experience additional dynamic loading.
Testing under defined combined conditions can help evaluate whether these interactions are relevant to component durability or functionality.
For electrical and electronic components, mechanical integrity alone may not be sufficient to demonstrate acceptable performance.
Depending on the validation objective, functional monitoring during combined testing can provide information about electrical continuity, signal behavior, or other defined performance parameters.
This is particularly relevant when a component's operating conditions may influence its response to mechanical loads.
Not every component requires these investigations. The potential value should be assessed against the expected failure mechanisms and available validation evidence.
Separate vibration and environmental tests remain suitable for many automotive validation programs.
Standards and OEM specifications may prescribe individual test procedures, conditioning sequences, or specific combinations of loads. These requirements provide the starting point for test planning.
Combined testing becomes especially relevant when engineers need to investigate how mechanical and climatic influences interact.
The decision can be guided by three questions:
For automotive electrical component testing, these considerations can be important when mechanical loads and functional performance need to be evaluated together.
However, combined testing should not automatically replace separate tests required by a specification. It may instead complement an existing validation program.
imat offers shaker testing as part of its automotive testing and validation services.
A shaker system combined with an integrated CTS climate chamber enables the evaluation of components under selected mechanical and climatic conditions.
For customers already working with imat on material testing, environmental testing, or component validation, this provides an opportunity to investigate additional load interactions within their testing activities.
The relevant questions may include:
These questions help establish whether combined shaker testing would contribute meaningful information.
The exact test configuration depends on the component, applicable requirements, and achievable operating conditions.
Before planning combined vibration and climate testing, engineers should identify the specific question the test needs to answer.
This includes reviewing the component's application, relevant mechanical and climatic influences, and any existing test results.
A particularly important distinction is whether the objective requires simultaneous exposure or whether sequential mechanical and environmental testing already provides the necessary evidence.
For combined exposure, the team must also determine which climatic conditions are technically feasible during vibration and whether functional monitoring is required.
At imat, these aspects can be discussed when evaluating a suitable testing approach for the component and its validation objectives.
The goal is to select a test configuration that addresses the relevant technical risks without introducing unnecessary complexity.
Shaker testing provides important evidence about the mechanical behavior of automotive components. Combining vibration with controlled climatic conditions can extend this evaluation when temperature or humidity may influence component performance.
The deciding factor is the validation objective.
Separate tests remain appropriate for many applications. Combined testing becomes valuable when interactions between loads are relevant to component behavior and need to be investigated under defined conditions.
For existing imat customers, this approach can complement established material, environmental, and component testing activities, helping address additional questions within a broader validation program.
Already working with imat on material, environmental, or component testing?
Our team can help you evaluate whether combined vibration and climate testing would provide useful additional insights for your next development or validation project.
Explore our shaker testing services and discover the available testing methods and options for your components.
Shaker testing exposes components or assemblies to controlled vibration profiles to evaluate their response to mechanical loads. It can help identify potential weaknesses related to fatigue, mechanical connections, or functional performance. The test conditions depend on the component and applicable requirements.
Yes. Shaker systems integrated with climate chambers can support vibration testing under controlled temperature conditions and, where technically feasible, humidity conditions. The achievable combinations depend on the equipment, test configuration, and specified requirements.
Combined testing is worth considering when climatic conditions may influence a component's mechanical response or functionality during vibration. It can provide additional validation evidence when interactions between loads are relevant to the component's application or potential failure mechanisms.