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Blog Posts Tagged Nonlinear Structural Materials Module

Keynote Video: Modeling the Multiphysics Behavior of Nuclear Fuel

November 6, 2017

A laboratory engineer discusses using multiphysics simulation to understand the complex and challenging behavior of nuclear fuel. Watch his presentation and get a quick summary here.

How to Implement Elastoplasticity in a Model Using External Materials

November 2, 2017

Sometimes the mechanical behavior of a material is not readily expressed in terms of a built-in model. In these cases, you can use external materials. Learn how with an elastoplasticity example.

Simulating Powder Compaction with Porous Plasticity Models

June 12, 2017

Powder compaction is an important and popular technique in many manufacturing industries. You can use porous plasticity models to analyze and improve the powder compaction process.

Modeling Fatigue Failure in Elastoplastic Materials

October 28, 2016

Imagine bending a metallic paper clip back and forth until, after a few repetitions, it breaks entirely. This is one example of fatigue failure, the most common type of structural collapse. In more severe cases, such failure can lead to collapse or malfunction in structures like car exhaust pipes and aircraft jet engines. To better understand and predict fatigue failure in elastoplastic materials, we can use the COMSOL Multiphysics® software to accurately model both the materials and the fatigue process.

How to Model Large-Strain Viscoelasticity in COMSOL Multiphysics®

October 11, 2016

Many polymers and biological tissues exhibit viscoelastic deformation, which has a time-dependent response even if the loading is constant in time. Linear viscoelasticity, where the stress depends linearly on the strain and strain rate, is a common approximation. We usually assume that the viscous part of the deformation is incompressible, so the volumetric deformation is purely elastic. As of COMSOL Multiphysics® 5.2a, you can model large-strain viscoelasticity besides linear viscoelasticity. See how to use this material model in a biomedical […]

GTI Streamlines Gas Pipeline Maintenance Procedures with Simulation

July 11, 2016

For gas pipeline maintenance standards, the adage “rules are meant to be broken” may not apply, but “rules are meant to be updated” certainly does. Specifically, the generous distance requirements between pipeline squeeze-off locations and pipe fittings cause potentially unnecessary digging. This prompted Operations Technology Development (OTD), a partnership of natural gas distribution companies, to initiate a project with Gas Technology Institute (GTI), where researchers used simulation to investigate the standard distance requirements for streamlined and safe pipeline maintenance.

Designing an App to Analyze Stress in a Pressure Vessel

March 9, 2016

Pressure vessels are designed to confine liquids or gases. These containers are used in nuclear plants, the chemical and petroleum industries, and even as water heaters in homes. In principle, the vessels’ internal pressure is much higher (or sometimes lower) than the ambient pressure, so the vessels must be carefully designed, as failure can result in severe damage. Today, we’ll explain how to use the Application Builder in the COMSOL Multiphysics® software to create an efficient and accurate design workflow.

Using Simulation to Analyze Arterial Wall Mechanics

October 12, 2015

Arteries are designed to carry blood containing oxygen and nutrients from the heart to other areas of the body. Studying this biological soft tissue from a mechanical standpoint requires a reliable model that can fully describe the arteries’ anisotropic nonlinear response. Our tutorial of arterial wall mechanics illustrates such a design.


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