BACKGROUND In the state of the art finite element AHBMs for car crash analysis in the LS-DYNA software material named *MAT_MUSCLE (*MAT_156) is used for active muscles modeling. It has three elements in parallel configuration, which has several major drawbacks: restraint approximation of the physical reality, complicated parameterization and absence of the integrated activation dynamics. This s...

The built up layer thickness in secondary deformation zone is one of the important parameters in metal cutting process. The built up layer (BUL) is formed in second deformation zone near the tool-chip interface in the back of the chip. This parameter influences the tool life and machined surface quality. This BUL should not be confused with the built up edge (BUE). The deformation of the BUL in...

A Reissner-Mindlin shell formulation based on a degenerated solid is implemented for NURBS-based isogeometric analysis. The performance of the approach is examined on a set of linear elastic and nonlinear elasto-plastic benchmark examples. The analyses were performed with LS-DYNA, an industrial, general-purpose finite element code, for which a user-defined shell element capability was implement...

Protection of structures against explosions due to terrorism actions or accidents is a growing concern in the current times. The need for engineers to understand the structural mechanics during blast load events motivated the research leading to this work. This paper investigates the structural response of integrally stiffened panels, with different stiffener configurations, subjected to blast ...

Cut blasting is one of the most essential processes to reduce blast-induced vibration in tunnel blasting. The long and large-diameter uncharged hole boring (LLB) method an example cut methods, which utilizes holes drilled face. In this study, simulations were performed analyze its mechanism, LLB traditional burn-cut simulated compare their efficiency. A 3D numerical analysis using LS-DYNA code,...

Modelling quasi-static crack growth with interface elements is a widely accepted technique [1-2]. Interface elements are inserted into the finite element mesh along possible crack paths. The interface elements are characterised by a traction-displacement curve. When a specific maximum stress is reached, the interface element undergoes a softening process until the critical fracture energy has b...

this paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. axial bearing analysis is done numerically using nonlinear finite element code ls-dyna. in this analysis, changes of two main parameters including measure of energy absorption o...

This is a study to investigate ballistics performance of armor structures with in-layer deflector against projectiles. For this purpose, the structure, which consists v-cross section sheet metal array covered aluminum and steel plates, has been designed optimized. Firstly, numerical simulations were studied using finite-element method (FEM). The ANSYS LS-DYNA FE software used for ballistic anal...

This paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. Axial bearing analysis is done numerically using nonlinear finite element code LS-DYNA. In this analysis, changes of two main parameters including measure of energy absorp...

in this paper, numerical simulation of frp composite cylinder tubes progressive crushing processes is conducted using ls-dyna. details on the numerical modeling strategy are given and discussed. it is found that triggers introduced in the numerical simulation can effectively model the bevel trigger at the end of the tubular specimens. it is also found that two-layer finite element model based o...