Mechanical Blog Posts
New Accumulators Boost Particle and Ray Tracing Functionality
With the release of COMSOL Multiphysics version 5.0, the Particle Tracing Module now includes a series of features called Accumulators, which can be used to couple the results of a particle tracing simulation to other physics interfaces. The accumulated variables may represent any physical quantity and can be defined either within domains or on boundaries, making them extremely flexible. Here, I will explain the different types of accumulators and their applications in particle tracing and ray optics models.
Which Fatigue Model Should I Choose?
The most frequent question we get regarding the Fatigue Module is “Which fatigue model should I use in my simulations?” There is no straight answer to this question, since fatigue is not based on an exact differential equation, but on engineering observations that lead to different physical models. The applicability of each model can depend on factors such as material and loading type. Today, I will discuss different approaches for fatigue model selection and the applicability of the different models.
Analyzing Aircraft Engine Noise Through Simulation
The reduction of aircraft engine noise has been a priority in the aviation industry for many years. Minimizing sound emissions, of course, requires an understanding of engine noise — a task that can become quite challenging due to the complex nature of aircraft systems and geometries. Using a model of an aero-engine duct, we provide a more in-depth look at the acoustical field in aircraft engines.
Rosetta and Philae: A Historic Landing on a Comet
How the Sun, solar system, and planet Earth formed and how life began are fundamental science questions that still remain unanswered. Today, we may be one step closer to answering these questions, because the spacecraft Philae, which is aboard the Rosetta, is in the process of landing on a comet for the first time ever. I was able to interview two of the scientists involved in this project to gain insight into how Rosetta’s mission may answer these very questions.
Synthesizing Graphene with Chemical Vapor Deposition
With its growing use in numerous applications, the demand for graphene has steadily increased over the years. This heightened interest has prompted new research behind the methods for synthesizing graphene — one of which is chemical vapor deposition. See how one research team used modeling to analyze and enhance the CVD graphene growth mechanism.
Coupling Structural Mechanics Interfaces
In addition to the general Solid Mechanics interface, the Structural Mechanics Module consists of specialized interfaces: Shell, Plate, and Membrane for the modeling of thin structures; and Beam and Truss for modeling slender structures. An engineering structure that has a mix of solid, thin, and slender components can be modeled by combining these physics interfaces with each other. Here, we will explore the options for coupling the structural mechanics interfaces by using examples from the Model Library.
Yield Surfaces and Plastic Flow Rules in Geomechanics
In order to ensure safe geotechnical building methods, specific applications require certain foundations and structure reinforcements. Tests are quite expensive to carry out, so simulation can be really useful and even essential. Many numerical models have been developed to give a deep insight into soil behavior. Here, we introduce the most widespread models for soils available in COMSOL Multiphysics and analyze a tunnel excavation example.
Piezoelectric Materials: Understanding the Standards
Standards form an integral part of the work we do as engineers, providing a common language for communicating complex information. But standards committees are not omnipotent and sometimes revised standards are not universally adopted. This has happened in the case of the standards for piezoelectric materials, particularly for quartz. This blog post explains the multiple standards used to describe piezoelectrics in literature. Although the particular focus of this post is on quartz, the standards described apply for any piezoelectric material.
- COMSOL Now
- Today in Science