At present, aluminum bumper has been used in the field of passenger cars. In order to provide technical reference for alloy be developed, and better develop bumper, this project analyzes material process an existing from perspective mechanical properties, composition, connection method between each component. Through crushing, static pressure, collision test simulation technology, performance b...

Abstract The dynamic contact parameters such as force, stress and rotational speed fluctuate with time during the actual operation of a sprag clutch. To this end, ANSYS LS-DYNA is applied to simulate dynamics various types clutches different wedge surfaces obtain curves speed, windup angle each component time. wedging performance all-phase type PCE (positive continuous engagement) clutch compar...

Robust finite element models are utilised for their ability to predict simple complex mechanical behaviour under certain conditions at a very low cost compared experimental studies, as this reduces the need physical prototypes while allowing optimisation of components. In paper, various parameters in techniques were reviewed simulate crushing glass/epoxy tubes with different material models, me...

assessing the behavior of composite structures which are subjected to impact loads is one of the important subjects in the field of mechanical sciences. using thin-walled tubes which collapsed and absorbed the impact energy is a well-known method to prevent damages to the other parts of the structures. in this paper, deformations, crushing length, peak load, mean force and energy absorption cap...

Abstract To study the effect of off-axis initiation on shaped charge performance. The nonlinear finite element software LS-DYNA is used to simulate jet forming and armour-breaking process under different offsets (0.025~0.125D k , D diameter). A theoretical model established analyse lateral velocity distribution jet. results show that degree asymmetric collapse increase with offset. When offset ...

This paper extends previous work with Dyna, a class of architectures for intelligent systems based on approximating dynamic programming methods. Dyna architectures integrate trial-and-error (reinforcement) learning and execution-time planning into a single process operating alternately on the world and on a learned model of the world. In this paper, I present and show results for two Dyna archi...

The impact damage response of balsa core sandwich composite plates with S2-glass/ epoxy reinforced facesheets is evaluated by impacting them with a spherical steel projectile at single impact locations. The impact damage can significantly reduce the structural integrity and load bearing capacity of a composite structure. Under high velocity impact loading, laminated composites experience signif...

Summary Crashworthiness analysis with the so-called explicit FE programs such as LS-DYNA [1] has reached a very mature status such that the number of real physical tests e.g. in the automotive industry has been reduced considerably. Though the element technology in the explicit programs has been mainly dictated by efficiency the quality of the results of nowadays standard crashworthiness analys...