Description:

The combined test is a comprehensive test in which four environmental stresses, namely temperature, humidity, vibration and altitude, are applied simultaneously. This comprehensive testing allows for a more realistic and practical assessment of a product’s performance in real-world usage scenarios and helps expose any defects present.

While applying individual environmental stressors to the product can induce failures, applying four different stressors simultaneously can easily accelerate the process by 3-5 times. Additionally, combining different environmental stressors can uncover failure modes that may not occur when stressors are applied individually.

During the comprehensive testing that involves temperature, humidity, vibration, and altitude, the product undergoes repeated expansion and contraction due to the different coefficients of thermal expansion of its internal materials. This can result in loosening at the joints. When humidity is introduced, moisture can infiltrate the gaps, causing a decrease in friction coefficients at the joints and connections. Applying vibration stress at specific frequencies can cause resonant phenomena in the product. These repetitive cycles of motion, moisture absorption, freezing, and resonance make it possible for new failure modes to occur that arise from both significantly accelerated individual factor failures and the combined effects of the four factors.

Scope of Application: 

Aviation, aerospace, military, electrical engineering, electronics, and other product assemblies and components.

Image of Testing Equipment: