Johnson-Cook塑性模型是一种具有硬化规律和速率依赖的解析形式的米塞斯塑性模型,主要适用于许多材料的高应变率变形模拟,包括大多数金属。 通常用于绝热瞬态动态模拟;与Abaqus/Explicit中的Johnson-Cook动态失效模型结合使用;Abaqus/Explicit中,可以结合...
This study concentrated on presenting the classical Johnson-Cook model by introducing a new temperature term, under the framework of an equivalence between heat energy and distortional strain energy. Importantly, the inner relationship among temperature, elastic modulus, the specific heat capacity at cons...
Non-oriented silicon steel 50WW70TensileJohnson–Cook modelJournal of the Brazilian Society of Mechanical Sciences and Engineering - Establishing a constitutive model that can accurately describe material plastic flow behavior in the ultrasonic energy......
A modified Johnson-Cook material model with strain gradient plasticity consideration for numerical simulation of cold spray process Surf. Coat. Technol., 397 (2020), p. 125981, 10.1016/j.surfcoat.2020.125981 View in ScopusGoogle Scholar [245] G. Montay, A. Cherouat, J. Lu, N. Baradel, ...
在爆炸、冲击相关邻域的研究中,材料处在高应变率和高温环境,发生了较大变形, 常采用 Johnson-Cook 本构模型描述金属材料的动态变形行为。该模型参数大多由霍普金森压杆试验(Split Hopkindon Pressure Bar,SHPB)确定,该试验能实现最高为 104 s -1 应变率[3]加载。
A constitutive model of 6063 aluminum alloy under ultrasonic-assisted upsetting at 298 K was constructed, as shown in Eq. (2), based on the Johnson-Cook model and the experimental results [59]: [Math Processing Error]\unicodex03A3=(C1+C2\unicodex03B5n)[1+(C3ln\unicodex03B5˙\unicode...
Afterward, the available methods and equations for modeling and prediction of flow curves during thermomechanical processing are assessed, where the strain-compensated Arrhenius model, artificial neural network (ANN) model, Zerilli-Armstrong model, Johnson-Cook model, Hensel-Spittel model, and dislocation...
Johnson cook 模型中的A,B,C,n 和 m:如果知道材料的到真实应力(true stress)和真实应变(true strain)曲线,取缩颈(necking)的起点为第一点,在缩颈之后取不同的点(几个未知参数取几个点)代入Johnson cook的本构关系中就能得到相应的参数(A,B,n,m)。希望能帮到你 ...
Furthermore, a modified Johnson–Cook model was proposed to describe the flow behaviors of the studied alloy based on the correction to the strain rate hardening coefficient. Comparisons between the experimental data and predicted results using the original JC model, Khan–Liu (KL) model and the ...
A modified Johnson-Cook model is proposed to take into account the thermally activated and viscous regimes that can be easily integrated in numerical codes. The model was calibrated using experimental data generated at temperatures ranging from 23 to 1000C and strain rates ranging from 0.002 to 3...