In this webinar, we will discuss various test methods that Veryst has developed to use when there is little material available for test samples.
Exposing plastics and polymers to elevated temperatures can expose products to increased risk of failure. Knowing how to identify the correct material and deploy it in your products requires understanding the structure and analysis of polymers.
This informative webinar is designed specifically for mechanical engineers who may not have extensive experience with polymer materials. We'll delve into polymer structure and essential techniques such as DSC, FTIR, DMA, and TGA, equipping you with the knowledge to analyze key properties beyond basic specifications. By mastering these methods, you'll gain a deeper understanding of polymer behavior, allowing you to make informed design decisions.
A medical device designer wanted to forecast the creep performance of a plastic part for at least two years. Veryst tested the material using time-temperature superposition to characterize the material’s long-term performance quickly and efficiently to determine if the design performs adequately after two years.
Additive manufacturing (AM) enables the production of complex lattice structures that cannot feasibly or economically be manufactured any other way. However, there are complicating factors that engineers are likely to confront when designing fine AM lattice structures: geometric inaccuracy and anisotropic material properties.
An adhesive joint was failing in the field. Veryst used DSC to investigate and determined the root cause to be improper curing of the adhesive.
Joining polyolefins such as polyethylene and polypropylene with adhesives can be challenging. Polyolefins have low surface energy, which creates weak bonds between the polyolefin material and the adhesive. Veryst used corona discharge plasma treatment to improve the bond strength and create a more robust joint.
Many additively manufactured polymers exhibit anisotropic mechanical properties which must be accounted for by engineers designing with these materials. This case study illustrates the importance of testing additively manufactured polymers at many orientations to identify the range of isotropic behavior as well as the optimal build orientation.
A train derails with an ensuing fire and evacuation of a neighborhood. What was the root cause of the derailment?
Cohesive zone modeling is a powerful tool for predicting delamination in adhesively bonded structures. Veryst engineers use their expertise in experimental and computational fracture mechanics to calibrate cohesive zone models for accurate prediction of adhesive failure.
Composite materials, such as carbon fiber reinforced polymers, provide a high strength-to-weight ratio for structures ranging from aerospace components to biomedical implants to consumer sports products. These materials require thorough and specialized methods for material testing and validation due to their anisotropic material properties.
Medical devices, such as the cranial perforator here, show imperfections that are rejected by physicians. Veryst investigated the source of these imperfections and recommended steps to remove them.
Polymers are prone to deform slowly over long periods of time when subjected to applied load, a phenomenon known as creep. Over time, the deformation can grow so large that the part no longer functions as intended. Veryst utilized creep testing to compare material choices and set temperature specifications for polymers.
A high-strength reinforced hose failed in service under normal operating conditions well before its intended design life. Inspections of the subject hose revealed that failure was mainly due to delamination.
The nonlinear deformation and material relaxation associated with modeling the polymer screws for anterior cruciate ligament (ACL) reconstruction makes predicting key quantities such as stresses and holding forces challenging. Veryst, with its unique ability to test and model PLLA materials, was able to develop material and finite element models that predict the important short-term pull-out forces as well as the evolution of stresses over time.