The peel test is widely used to measure the adhesion of thin, compliant films to rigid substrates. An accurate model of the peeling mechanics is required to extract the interface adhesion energy. Veryst used the PolyUMod® material model library along with a cohesive zone model of interface adhesion to simulate the peeling of a soft viscoplastic film from a rigid substrate.
Obtaining accurate results from finite element analyses of polymers is not easy. Polymers are often highly temperature- and rate-dependent, exhibiting significant stress-relaxation, creep, and recovery. In this forming case study, Veryst examines the steps required to produce an accurate constitutive model of an example polymer, polyether ether ketone (PEEK), and shows the consequences of oversimplification.
Some of the most sensational goals in soccer history came from free-kicks and long shots. (Remember Roberto Carlos’ famous 1998 free-kick?) Veryst investigated the effect of friction between ball and boot, the ball’s internal pressure, and ball materials on the ball’s rotational velocity to understand ball/boot interaction.
How does a soft fluidic gripper perform when inflated and how does it interact with its environment? This is a challenging, yet essential, question to the design and integration of soft robotics in the industry. Veryst Engineering developed a finite deformation Abaqus model to study the behavior, performance, and stability of soft fluidic grippers, providing insight to the design and assessment of soft robots and devices.
Veryst can predict the ultimate strength and failure modes of design concepts generated using topology optimization and produced using additive manufacturing. We use advanced finite element analysis (FEA) that accounts for the nonlinear behavior of the material being used to make the part.
Veryst uses its extensive expertise in simulation and analysis to develop customized computational solutions. Clients developing new materials or new production processes are at a disadvantage when suitable simulation tools are not yet available. Veryst can develop unique, customized solutions such as simulation applications ("apps"), new material subroutines, and custom algorithms.
Veryst has extensive experience selecting and calibrating a material model to capture the most important aspects of material behavior for your specific material and conditions during use.
Once a material model has been selected and calibrated to the test data, Veryst recommends validating the model by performing a test with a stress state different from any used for calibration.
Veryst works with clients to develop high-performance, reliable, and manufacturable medical devices. We apply advanced characterization technologies, engineering analysis, and sophisticated simulation software to provide cost-effective solutions to time-critical engineering problems.
Veryst offers leading expertise in advanced finite element modeling, particularly for complex, nonlinear problems. We can address problems that other finite element analysis consultants either cannot or are not sufficiently experienced to do well.
Veryst can specify a test program—a standard combination of tests—that captures your material’s response for use with a particular material model in a variety of finite element software packages. We have developed packages for many common constitutive models, but can customize the test plan to any model.
The makers of ADINA software have announced that “in response to customers’ requirements,” ADINA supports the Bergstrom-Boyce and Three-Network viscoelastic material models, saying, “These sophisticated material models allow users to capture complex viscoelastic behaviors of polymeric components.”
Veryst is pleased to announce our new Veryst Software Help Center! The Help Center makes it easy for those using the PolyUMod® and MCalibration® software to ask for help, share feedback, and track progress on service requests. It's also easy to request a new license.
Veryst has released a new version of the PolyUMod library of advanced material models and the MCalibration parameter extraction software with significant new features.