2024.11.13
The simulation analysis results of stress triaxiality assistance are more in line with engineering reality
The stress triaxiality (i.e. the ratio of average normal stress to equivalent stress) can more reasonably reflect the influence of stress state on plastic deformation and fracture failure.
Detail
2024.11.06
Fatigue life estimation method under alternating stress
Practice has shown that the failure mode of components under alternating stress is completely different from that under static load. Under alternating stress, although the maximum stress is lower than the yield limit, it will suddenly fracture after long-term repetition.
Detail
2024.10.31
Diagram of standardized and non standardized mechanical tests for anisotropic polymer based composite materials
With the widespread use of polymer based composite materials, their mechanical property testing has become increasingly important. One of the main challenges in testing these anisotropic materials is the need to develop various fixtures to provide various methods for testing materials under different conditions.
Detail
2024.10.24
How can sunshine simulation tests help shorten the automotive development cycle?
The factors that affect the aging of automotive interior and exterior parts are light, temperature, and humidity. The sunlight simulation test simulates the exposure of the vehicle to sunlight, high and low temperatures, and humid and hot weather throughout its lifecycle to verify whether defects will occur during use.
Detail
2024.10.24
Seven major differences between environmental testing and reliability testing, attached is a list of conditions for automotive electronic environmental and reliability testing!
Although environmental testing and reliability testing are closely related, they have distinct differences in terms of testing objectives, the number of environmental stresses used, criteria for selecting environmental force values, testing types, testing time, and testing termination criteria.
Detail
2024.10.15
How to comprehensively evaluate the low VOC and low haze PBT automotive headlight decorative ring?
The streamlined and personalized design requirements of the car's exterior make the distance between the headlights and the decorative frame increasingly close. The gradual increase in the wattage of the front headlight bulbs leads to accelerated aging and deformation of materials, as well as fogging of the headlights. Therefore, the requirements for the heat-resistant and VOC content of the headlight decorative ring materials are becoming higher and higher.
Detail
2024.10.08
Technical Sharing | Effects of Flame retardants, Weathering agents, and Titanium Dioxide on the Light Aging and Weathering Resistance of Flame Retardant ABS
This article investigates the color difference changes before and after material aging, and studies the effects of adding flame retardants, weather resistant agents, and titanium dioxide on the photo aging and weather resistance of flame retardant ABS, providing theoretical support for the application of flame retardant ABS in electronic and electrical products.
Detail
2024.09.24
Fitting of creep constitutive equation and prediction of long-term deformation of ABS for electrical and electronic shells
By using the creep constitutive equation, it is possible to simulate the long-term deformation of materials under actual working conditions and predict the service life of structures. This is particularly important for products that serve under high temperature conditions for a long time, and is beneficial for optimizing product design and performance.
Detail
2024.09.17
Consistency Case | Summary and Analysis of Density Measurement Laboratory Comparison of Plastics in 2024
In order to test the ability of various laboratories to measure the density of plastics, the National High Material Analysis and Testing Center organized a laboratory comparison activity for this project in 2024, to verify the accuracy of the measurement results through the comparison activity
Detail
2024.09.03
Consistency Case | Laboratory Comparison and Summary Analysis of Vicat Softening Temperature Measurement of Plastics in 2024
A total of 40 laboratories have registered for this laboratory comparison, and 35 laboratories have submitted their test results.
Detail
2024.08.27
Expansion of the evaluation method for anti cracking performance of low smoke halogen-free cable materials
This article independently designed an evaluation experiment for anti cracking performance, expanded and enriched the testing methods for evaluating anti cracking performance, and combined with the test results, explored the cracking mechanism of low smoke halogen-free cable materials.
Detail
2024.08.20
Technical Sharing | Hot Wire Ignition (HWI) Level Determination and Influencing Factors of Thin Non Metallic Materials
Poor electrical performance may indeed increase the risk of fire, commonly known as "internal fire". Enterprises need to use hot wire ignition testing methods to assess the combustion performance of materials when the product experiences local overheating, in order to select materials that meet the requirements and reduce the risk of internal fire in the product.
Detail
