although explicit and implicit knowledge of language learners are essential to theoretical and pedagogical debates in second language acquisition (sla), little research has addressed the effects of instructional interventions on the two knowledge types (r. ellis, 2005).this study examined the relative effectiveness of explicit and implicit types of form-focused instruction (ffi) on the acquisit...

The temperature is a critical factor that determines the unfrozen water content and ice in frozen soil. In view of mechanical properties soil depend on volume components four-phase systems, thus has significant impact behaviors deformation properties. thermal state embankment permafrost regions seasonal difference, then seismic performance alters with season. addition, highly influenced by eart...

ABAQUS offers the possibility to model non-linear isotropic materials as well as linear anisotropic materials. However, it is not possible to use these two capabilities at the same time in order to model anisotropic hyperelastic materials. Gurvich proposed to model such materials by means of the linear superposition of two fictitious materials: a linear anisotropic, and a hyperelastic isotropic...

A software tool for automated crack onset and growth simulation based on the eXtended Finite Element Method (X-FEM) is developed. This XFA tool for the first time is able to simulate arbitrary crack growth or composite delamination without remeshing. The automated tool is integrated with Abaqus/Standard and Abaqus/CAE via the customization interfaces. It seamlessly works with the Commercial, Of...

A multilink suspension offers a good balance between ride and handling performance and packaging space efficiency. It is also complex in design due to changes in link loading and compliance at high articulation travel. Therefore, geometric and material non-linearity behaviors are important to consider when designing these types of suspension components. Structural topology optimization has been...

Abstract Manufacturing processes, such as machining, can produce residual stresses in products. Residual stress and its distribution be the main factor influencing fatigue life of machined components has already been subject many experimental numerical studies. The high-temperature condition, a result makes change microstructural properties material consequently affect mechanical workpiece. A m...

The topic of this paper is experimental and numerical analysis the impact strength unreinforced concrete slabs. Impact significant in case some accidental loads during exploitation. can be determined experimentally, using Drop-weight test, Charpy Projectile Explosive etc. In research, a model for determining slabs based on Finite element method (FEM) high-end engineering software has been propo...

The emergency break-away technology of civil aircraft is particularly important to the safety aircraft, and fuse pin key realization technology. A type pylon was taken as research object. Firstly, finite element structure model established by ABAQUS, explicit dynamic algorithm used study process load pins. Secondly, shear failure test designed verify accuracy model. Finally, influence diameter-...