نتایج جستجو برای: johnson cook model
تعداد نتایج: 2123370 فیلتر نتایج به سال:
Abstract The modified Johnson-Cook constitutive model was developed for describing the flow behavior of Al-7.8Zn-1.65Mg-2.0Cu (wt%) alloy based on curves in temperature range 300 °C?450 °C and strain rate 0.01 s ?1 ? 10 which were obtained by isothermal compression tests conducted a Gleeble-3500 simulator. A two-step optimization method proposed to optimize prediction precision according evalua...
Abstract Jammed granular systems, also known as vacuum packed particles (VPP), have begun to compete with the well commercialized group of smart structures already widely applied in various fields industry, mainly civil and mechanical engineering. However, engineering applications VPP are far ahead mathematical description complex mechanisms observed these unconventional structures. As their wi...
An explicit 3D Finite Element (FE) model was developed in the LS-Dyna code to simulate laser shock paint stripping on aircraft aluminum substrates. The main objective of is explain physical mechanisms process terms wave propagation, stress and strain evolution shape size evaluate effects material parameters pattern. To behavior aluminum, Johnson–Cook plasticity Gruneisen equation state were app...
1569-190X/$ see front matter 2011 Elsevier B.V doi:10.1016/j.simpat.2011.10.009 ⇑ Corresponding author. Address: Laboratoire de M 42 27; fax: +33 (0) 4 91 16 44 81. E-mail address: [email protected] (A. Mau This paper describes investigations realised to perform simulations of shoulder milling operations on AISI 304L stainless steel using the commercial software LS-Dyna . A Lagrangian form...
A transient three-dimensional thermomechanical model was developed to examine the evolution of thermal and mechanical fields in laser powder bed fusion Ti-6Al-4V alloy, particularly with respect development plastic strain. primary focus evaluate influence material constitutive models on predicted behaviors. Johnson-Cook (JC) were chosen account for contribution strain, strain rate, temperature ...
George Mtove, Joseph P. Mugasa, Louisa A. Messenger, Robert C. Malima, Peter Mangesho, Franklin Magogo, Mateusz Plucinski, Ramadhan Hashimu, Johnson Matowo, Donald Shepard, Bernard Batengana, Jackie Cook, Basiliana Emidi, Yara Halasa, Robert Kaaya, Aggrey Kihombo, Kimberly A. Lindblade, Geofrey Makenga, Robert Mpangala, Abraham Mwambuli, Ruth Mzava, Abubakary Mziray, George Olang, Richard M. Ox...
Experimental analysis of conventional turning (CT) and ultrasonically assisted (UAT) two varieties particulate SiC infused aluminium metal matrix composite (217XG, 225XE) is carried out. The results indicate the amount tangential cutting force reduction in UAT compared to CT increased at lower speed higher depth-of-cut. using carbide tools reduced average forces by 60.5%, 29.5% for 217XG 225XE,...
Taylor anvil test is one of the dynamic method in which we can determine dependences strain, strain rate, temperature on flow stress. With this method, each cross sec-tion or along axial section specimen conditions under different states stress, rates and subsequent changes microstructure material. This paper describes experimental results (TAT) for TRISTAL carbon steel. The experiment was perf...
Aluminum alloys are the most attractive solutions for many industries including aerospace, marine, and other transportation sectors where lightweight construction is required. Friction Crush Welding (FCW) a new material joining process that simultaneously creates mechanical lock metallurgical seal at interface between similar dissimilar materials. In this research work presents development of n...
The objective of this project is to get the energy absorption aluminium honeycomb core through experimental work and simulation analysis. force-displacement behavior absorb are studied for two different cell sizes core, which 0.0127 m 0.01905 m, respectively. out-of-plane dynamic compression tests conducted specimens by using INSTRON CEAST 9340 drop tower machine with an impact mass 25 kg at 80...
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