What is the Difference Between Thermal Shock and Temperature Cycle Testing?
Our customers often ask, What is the Difference Between Thermal Shock and Temperature Cycle Testing? Both types of tests expose products to cycles between hot and cold temperatures. Both tests produce stresses caused by thermal expansion and contraction. In many cases, components expand and contract differently. This creates cumulative fatigue damage during each cyclic, which could result in a fatigue failure. Thermal shock exposes devices to rapid temperature changes greater than 15°C/minute. Temperature cycle testing uses a transition rate less than 15°C/minute and is usually between 1 to 10°C/minute from our experience.
How to Make Your Product More Reliable Through Testing
At DES, we have tested many different kinds of products ranging from medical devices to aerospace products. We have performed numerous reliability tests and developed numerous accelerated life test plans. Many times, our customers ask us, “How do we make our products more reliable?” There are analytical methods and processes that can be used to improve product reliability. However, the focus of this article will be How To Make Your Product More Reliable Through Testing.
Delserro Engineering Solutions Featured in Assembly Magazine
DES president Gary Delserro is featured in an article published in Assembly Magazine on July 9, 2021. Titled “Accelerated Life Testing,” the article discusses different types of manufacturing life testing and quotes Gary with reference to highly accelerated life testing (HALT): “Companies have reported savings in the millions after using HALT,” claims Delserro. “The test can accelerate a product’s aging process from actual months into test minutes, and it can help you discover weaknesses in your product during the design stage. Combined vibration, temperature and electrical stress variables, as well as internal fluid pressure, are typically used during HALT to…
Delserro Engineering Solutions (DES) – Recent Projects (Spring 2021)
Recently, DES has been very busy working on multiple space and aerospace test programs. We can’t discuss too many details due to the sensitive nature of the products. Some highlights are:
What Exactly is MIL-STD 810?
MIL-STD 810 is a Department of Defense Test Method Standard for environmental engineering considerations and laboratory tests. It is the most popular Military specification used to conduct environmental testing of military products. It exists so as to ensure that products used for defense-related purposes meet very specific requirements with regard to ruggedness, durability, and performance. Given the fact that these products may be exposed to harsh or even extreme conditions, their reliability under stress is essential
HALT Testing: When Should You Perform It?
Highly Accelerated Life Testing, or HALT, is a technique used in the industry to speed up the design and test phases of product development, as well as limit the number of field failures and thus reduce warranty costs incurred by the manufacturer. HALT Testing can be a competitive advantage for companies when performed correctly and at the right time. The best time to begin HALT testing during the product development process is when prototypes first become available. HALT is designed to expose product flaws and weaknesses, therefore, a successful test will produce areas for product improvement. A lot of designers…
Salt Fog or Salt Spray Testing
Salt fog (aka salt atmosphere or salt spray) testing exposes components to a fine salt fog mist that can result in rusting or corrosion of susceptible materials. Samples to be tested are hung or placed on a rack inside of the salt fog chamber at the orientation that is specified in the applicable test method or otherwise agreed to with the customer. The orientation during testing is important as unintended corrosion can result if the salt fog is allowed to condense and pool on the sample. The samples are then exposed to a salt fog of defined salt content. The…
How to Implement a HASS Program
This article is a general outline on how to implement a HASS program after a successful HALT has been performed and corrective actions have been completed for any weaknesses found during HALT. For more information about HASS, please read our blog, What is HASS Testing? For more information about HALT, please read our blogs What is HALT (Highly Accelerated Life Testing) and Why Perform HALT? What Kind of Failures Occur During HALT? What Equipment is Used for HALT? What is a Typical HALT Procedure?
What is HASS Testing?
HASS is an acronym for Highly Accelerated Stress Screening. HASS is performed during manufacturing on production products or components. It is a screening method used to expose manufacturing defects that would cause a failure in normal field environments including shipping, storage and use.
DES Performs Testing for NASA Psyche Program
Delserro Engineering Solutions (DES) was proud to recently perform testing for the NASA Psyche Program. More information about this program can be found at the following web link https://www.jpl.nasa.gov/missions/psyche/. DES was contracted by a local manufacturer to help qualify their product for use in the demanding Psyche spacecraft environment. DES’s role was to perform specialized pyroshock testing and vibration testing on their products. What sets DES apart from other labs is our in-depth experience and technical capability to understand and reproduce the most complicated vibration and shock profiles. DES continues to perform the most complex vibration and shock tests on…