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LMS Virtual.Lab Durability
Designing for optimal durability performance -
Undoubtedly the most challenging task for durability engineers is designing fail-safe components and systems in the most efficient manner. System parts with insufficient fatigue strength may cause permanent structural damage and potentially lifethreatening situations. Mistakes can cause product recalls which negatively influence the overall brand image. In addition to this, short design cycles, more design variants and increased usage of new lightweight materials increase the complexity of the durability engineering process.
Transforming durability challenges into advantages -
Shorter development cycles and increased quality requirements have stretched traditional test-based durability
processes to the limit. Evaluating and reliably optimizing durability performance on a virtual prototype is the only valid alternative. Just a few years ago, predicting component-level fatigue life took weeks while a system-level analysis could translate into months - if possible at all. Exploring multiple options to optimize design durability was simply not feasible and the only real option was to use expensive hardware treatments late in the development cycle.
Thanks to years of customer and research institute experience, LMS Virtual.Lab Durability tightly integrates various virtual prototyping aspects including finite element (FE), modal analysis, multi-body simulation (MBS) and fatigue-life prediction. Users can quickly explore and optimize the structural strength and fatigue life on both component and system assembly levels in time or frequency domains. LMS Virtual.Lab Durability executes fast and accurate durability predictions. Dedicated post-processing capabilities provide engineers with immediate feedback regarding all critical durability areas, critical loads and critical events.
Validate more design variants for fatigue life within evershorter development cycles Confidently simulate durability performance of large-and complex systems Optimize durability performance with lightweight and eco-friendly materials Better understand and improve fatigue testing
The integrated process approach to durability engineering -
The LMS fatigue solvers have been maturing for almost two decades to guarantee fast and accurate results. Technology breakthroughs in intelligent filter algorithms, analysis for welded structures, application of time dependent stress gradients are just some examples of recent technological innovations. This is accompanied by usability breakthroughs, like the only real seamless integration of multi-body simulation and fatigue, state-of-the-art automation tools, and optimal post-processing tools to analyze the source of fatigue problems.
Efficient seam and spot weld assessments -
Vehicle body and suspension systems can include thousands of welds. For spot welds, LMS Virtual.Lab Durability supports the Rupp/LBF approach, CDH and a special JSAE model as well as a stress-based approach using detailed modeling.
LMS Virtual.Lab Durability automates seam-weld durability assessments, eliminating the tedious task of adapting the FE mesh according to seam-weld meshing guidelines. Users simply define the manufacturing details and LMS Virtual.Lab Durability identifies local stress concentrations based on all the possible combinations of (local) load conditions. Sheet connections are automatically detected and classified according to element or predefined groups while connection types are automatically classified according to butt welds, overlap joints and T-joints.
Outstanding accuracy through in-depth investigation -
Assessing load effects can be challenging, particularly with multiple independent inputs that generate forces with local multi-axial stress states, LMS Virtual.Lab achieves outstanding accuracy by treating these cases based on the critical plane approach, which accounts for anisotropy caused by microscopic small cracks. Fatigue cracks below the surface can be analyzed as well.
Fatigue-life solver fit for rigid and flexible bodies -
While components such as knuckles are never excited close to their natural frequencies, other parts such as suspension sub-frames, truck chassis, or exhaust systems are. To accurately and efficiently tackle any situation, LMS Virtual.Lab Durability supports different approaches for predicting stresses, based on quasi-static, inertial relief and modal superposition techniques.
Top analysis speed with smart data reduction -
When creating real-life industrial size models, LMS Virtual.Lab Durability intelligently and automatically reduces the amount of data via node elimination reverse path (RP) filtering and load-based filtering. There is no need to guess where the critical locations might be - all locations are found automatically. Analyzing a complex car body model with hundreds of spot and seam welds and over 350,000 elements takes just a few hours.
From component-level to system-level durability prediction -
Full-assembly design issues are too often discovered late in the development process. To solve this, durability engineers need to optimize subsystems or systems as a whole. This is where LMS Virtual.Lab Durability steps in. It tightly integrates multibody simulations with flexiblebody analyses and fatigue-life predictions. The durability performance of any particular system part can be effectively and accurately traced. LMS Virtual.Lab’s proven solver technology and real-life modeling capabilities guarantee top-class prediction accuracy.
Accurate system load simulation -
Long before the actual vehicle prototype is created, LMS Virtual.Lab Durability can be used to generate system loads, starting from virtual driver sessions or road tests from a previously released vehicle. The LMS Digital Test Track approach predicts spindle loads via realistically simulated driver sessions. A virtual vehicle is equipped with virtual tires and drives over a digitized test track. For tracks and public roads that are too complex or expensive to digitize, LMS Virtual.Lab Durability offers a valid alternative. The LMS Hybrid Road approach incorporates test-based system loads from a predecessor vehicle to generate loads for the new vehicle design.
Automated durability analysis -
LMS Virtual.Lab Durability provides all the automation functionalities to define a complete durability analysis case from scratch. Users will benefit from the powerful LMS Virtual.Lab toolset to define templates and to efficiently automate the preparation of loads and post processing cases. Furthermore, the automation functionality provides extensive flexibility to interact with external optimization tools. |
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 Download the LMS Virtual.Lab Durability Brochure
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