Traffic accident animation provides a dynamic 3-D color visual portrayal of the time - speed - position histories of vehicles and/or pedestrians. The elastomers are modeled using *MAT_SIMPLIFIED_RUBBER and the plies are modeled using *MAT_ORTHOTROPIC_ELASTIC.Computer animations and simulations are effective tools in performing and presenting accident reconstruction analyses. All major components of the tire use 8-noded hexahedron elements. The finite element mesh is based on 2D CAD data of the tire section. The models are based on a series of material, verification, and component level tests. These models can be downloaded through the LST, Models download section. LST jointly developed tire models with FCA. These tests are proprietary data and are not currently available to the public. LSTC ODB and MDB models are developed to correlate to several tests provided by our customers. LSTC offers several Offset Deformable Barrier (ODB) and Movable Deformable Barrier (MDB) models. There are a wide variety of ATDs available to represent different human sizes and shapes. Ideally, ATDs should behave like real human beings while being durable enough to produce consistent results across multiple impacts. These measurements can then be interpreted to predict the extent of injuries that a human would experience during an impact. LS-TaSC handles topology optimization of large nonlinear problems, involving dynamic loads and contact conditions.Īnthropomorphic Test Devices (ATDs), as known as "crash test dummies", are life-size mannequins equipped with sensors that measure forces, moments, displacements, and accelerations. Developed for engineering analysts who need to optimize structures, LS-TaSC works with both the implicit and explicit solvers of LS-DYNA. LS-TaSC™ is a Topology and Shape Computation tool. Together, design optimization and probabilistic analysis help you to reach an optimal product design quickly and easily, saving time and money in the process. A probabilistic analysis, using multiple simulations, assesses the effect of the input variation on the response variation and determines the probability of failure. Probabilistic analysis is necessary when a design is subjected to structural and environmental input variations that cause a variation in response that may lead to undesirable behavior or failure. LS-OPT uses a systematic approach involving an inverse process for design optimization: First you specify the criteria and then you compute the best design according to a mathematical framework. It is difficult to achieve an optimal design because design objectives are often in conflict. Many of the standard FEA capabilities, such as contact, spot-weld models, anisotropic constitutive laws, or frequency domain analysis, are readily available in LS-DYNA with new features added steadily.Īnsys LS-OPT is a standalone design optimization and probabilistic analysis package with an interface to Ansys LS-DYNA. LS-DYNA is the first commercial code to support IGA through the implementation of generalized elements and then keywords supporting non-uniform rational B-splines (NURBS). Isogeometric analysis (IGA) has been extensively studied in the past few years in order to (1) reduce the effort of moving between design and analysis representations and (2) obtain higher-order accuracy through the higher-order interelement continuity of the spline basis functions used in CAD. The actual geometry of the CAD parts is preserved which is in sharp contrast to finite element analysis (FEA) where the geometry is approximated with, potentially higher-order, polynomials. The isogeometric paradigm employs basis functions from computer-aided design (CAD) for numerical analysis. Since the material erosion technique is no more necessary, the simulation of the material failure processes becomes very effective and stable. These two numerical methods share a common feature in modeling the 3D material failure using a bond-based failure mechanism. The Peridynamics method is another compelling method for brittle fracture analysis in isotropic materials as well as certain composites such as CFRP. The smoothed particle Galerkin (SPG) method is a new Lagrangian particle method for simulating the severe plastic deformation and material rupture taken place in ductile material failure.
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