How Do Shock and Vibration Help Evaluate Product Reliability?

For manufacturers, testing for product integrity is of utmost importance. It’s stress testing productessential that designers and manufacturers know the effects of various environments on the items before they do mass production. Otherwise, the products might be recalled, greatly affecting the company’s credibility and standing in the market.

Most products undergo a series of environmental tests collectively known as Accelerated Stress Testing (AST). These methods overstress the products to show their weak links, so product designers can plot a solution on the get-go.

Using Vibration and Shock to Test Product Integrity

Highly Accelerated Stress Screen (HASS) equipment use various stress points to find defects. Compared to Highly Accelerated Life Test (HALT), which uses low levels of stress for multiple cycles, HASS is more rigorous, as it aims to discover product issues early in the manufacturing process. This method uses vibration and shock tests to induce harsh environments that may affect the product’s reliability.

Types of Vibration and Shock Environmental Tests

Airbags, phones, shipping containers, military, as well as commercial equipment need vibration and shock tests to pass quality control, especially since these products experience continuous movement from production to consumer use.

As a manufacturer, are you sure that your products can sustain shaking or continuous vibration while the user is in transit or just using it in general? This is where vibration testing comes in, as it evaluates the products’ reliability in similar conditions.

With more innovations that came with vibration technology, experts have come up with methods that produce real-world data. One of them is random vibration testing, which, in controlled frequency and amplitude, produces data comparable to real-world data.

Instead of doing drop testing, there are facilities that have classical shock testing equipment, which offer better accuracy and repeatability. Most of the time, this involves an abrupt change in direction, causing a rapid velocity change. Classic shock testing uses sawtooth, haversine, half sine, and trapezoid shock impulses.

Product designers and manufacturers shouldn’t overlook the use of reliability testing methods, as these can help reduce the expenses that come with product failure, especially when the product is in its last stages of the manufacturing process.