Modified Johnson-Cook model of aluminum alloy 6016-T6 sheets at low dynamic strain rates

2021 ◽  
pp. 141565
Author(s):  
Zhe Jia ◽  
Ben Guan ◽  
Yong Zang ◽  
Yuan Wang ◽  
Lei Mu
Keyword(s):  
Aluminum Alloy ◽  
Dynamic Strain ◽  
Strain Rates ◽  
Cook Model

A modified Johnson–Cook model for tensile flow behaviors of 7050-T7451 aluminum alloy at high strain rates

2015 ◽  
Vol 631 ◽  
pp. 214-219 ◽  
Author(s):  
Jin Qiang Tan ◽  
Mei Zhan ◽  
Shuai Liu ◽  
Tao Huang ◽  
Jing Guo ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Strain ◽  
Strain Rates ◽  
High Strain Rates ◽  
Cook Model

Strain rate effects on the mechanical behavior of single-lap glass/carbon nanofiber/epoxy composite bolted joints

2020 ◽  
Vol 54 (30) ◽  
pp. 4807-4819 ◽  
Author(s):  
AR Shamaei-Kashani ◽  
MM Shokrieh
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Epoxy Composite ◽  
Bolted Joints ◽  
Dynamic Strain ◽  
Experimental Program ◽  
Strain Rates ◽  
Mechanical Parameters ◽  
Damage Initiation ◽  
Bearing Strength

In the present research, effects of applying strain rate on the mechanical behavior of single-lap glass/CNF/epoxy composite bolted joints including, damage initiation bearing stress, 2% offset bearing strength, ultimate bearing strength, bearing chord stiffness, ultimate bearing strain, and energy absorption were studied. To this end, a comprehensive experimental program was conducted. The protruding head bolt was used, the clearance was considered to be near fit and a finger-tight bolt condition was applied to all joints. The dimensions of joints were chosen to promote the bearing failure mode based on the ASTM standard. Four types of single-lap bolted joints (SLJs) with lay-ups of [–45/0/45/90]s and [90/–452/45]s with and without CNFs were tested at strain rates in the range of 0.0048 s−1 to 0.89 s−1. Unlike the available experimental results, the results obtained by the present experiments showed that the strain rate has a significant effect on all the above-mentioned mechanical parameters of SLJs. Also, it was shown that employing CNFs improved the mechanical parameters of SLJs under quasi-static and dynamic strain rates.

Plastic Flow Stress and Constitutive Model for H96 Brass Alloy

2015 ◽  
Vol 782 ◽  
pp. 130-136 ◽  
Author(s):  
Ping Zhou ◽  
Wei Guo Guo ◽  
Hai Hui Wu
Keyword(s):  
Flow Stress ◽  
Constitutive Model ◽  
Plastic Flow ◽  
Split Hopkinson Pressure Bar ◽  
Testing Machine ◽  
Experimental Results ◽  
Dynamic Strain ◽  
Strain Rates ◽  
Brass Alloy ◽  
Plastic Flow Stress

To explore the thermo-mechanical response of H96 brass alloy, the quasi-static (universal-testing machine) and dynamic (the split Hopkinson pressure bar apparatus) uniaxial compression experiments have been performed under the temperatures from 293 K to 873 K and the strain rates from 0.001 s-1 to 6000 s-1, and the strains over 60% are obtained. Results show that, H96 brass alloy has strong strain hardening behavior, and it becomes weaker with the increasing temperature. In addition, this alloy is sensitive to strain rates; and, it has temperature sensitivity, the dynamic strain aging occurs at the temperature of 473 K and a quasi-static strain rate of 0.001 s-1. Based on the thermal activation dislocation mechanism, paralleled with the experimental results, a plastic flow constitutive model with the physical conception is developed. The model is suitable to predict the plastic flow stress at different temperatures and strain rates. According to comparing results, the model predictions are in good agreement with the experimental results.

Constitutive model of 6063 aluminum alloy under the ultrasonic vibration upsetting based on Johnson-Cook model

Ultrasonics ◽  
2019 ◽  
Vol 96 ◽  
pp. 1-9 ◽  
Author(s):  
Zhendong Xie ◽  
Yanjin Guan ◽  
Jun Lin ◽  
Jiqiang Zhai ◽  
Lihua Zhu
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Model ◽  
Ultrasonic Vibration ◽  
6063 Aluminum Alloy ◽  
Cook Model
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