Tri-Comprehensive Test - Project Introduction

The comprehensive test involves simultaneously applying three environmental stresses—temperature, humidity, and vibration. The combined effect of the environment provides a more realistic and practical reflection of the product's performance in actual field use, and is better at exposing the product's defects.

Applying a single environmental stress to a product can trigger its failure. However, applying three different environmental stresses can easily yield a 3-5 times acceleration effect. Additionally, combining various environmental stresses can also elicit failures that do not appear when applying individual stresses.

During comprehensive tests with simultaneous application of temperature, humidity, and vibration stress, from the perspective of the failure mechanism, the internal components of products subjected to temperature cycling undergo expansion and contraction due to differences in material expansion coefficients, leading to loosening at the junctions. At this point, if humidity is applied, moisture will infiltrate through the gaps, reducing the friction coefficient at the junctions and connections. Further application of vibration stress can trigger resonance phenomena at specific frequencies. Through the repetitive processes of motion, moisture absorption, freezing, and resonance, the emergence of new failure modes (caused by the combined effects of accelerated individual factor failure modes and the叠加 effect of the three factors) becomes possible.

Application Scope

The three-in-one temperature, humidity, and vibration tests are widely applied to the whole machines and components of aviation, aerospace, electrical, and electronic products. These comprehensive tests are an indispensable and crucial means throughout the entire process of product and material development, prototype testing, and product qualification testing.

Method Standards

Reference standards for comprehensive tests: GB/T2423.35, GB/T2423.36, IEC/EN60068-2-50; IEC/EN60068-2-51.