Effects of cold temperatures, strain rates and anisotropy on the mechanical behavior and fracture morphology of an Al-Zn-Mg-Cu alloy

Carbon-like materials such as the anode and the ramming paste play a crucial role in the efficiency of the Hall–Héroult process. The mechanical behavior of these materials during forming processes is complex and still ill-understood. This work aimed to investigate experimentally the mechanical behavior of a carbon paste used in the aluminum industry under different loading conditions. For this purpose, experiments consisting of (1) relaxation tests at different compaction levels, (2) quasi-static cyclic tests at several amplitudes, (3) monotonic compaction tests at varied strain rates, and (4) vibrocompaction tests at different frequencies were carried out. The obtained results highlight some fundamental aspects of the carbon paste behavior such as the strain rate’s effect on the paste compressibility, the hardening-softening behavior under cyclic loadings, the effect of cycling amplitude on the stress state and the paste densification, and the frequency effect on the vibrocompaction process. These results pave the way for the development of reliable rheological models for the modeling and the numerical simulation of carbon pastes forming processes.

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Dynamic Mechanical Behavior at Elevated Temperatures and High Strain Rates of Structural Stainless Steel Used in Civil Engineering

Journal of Materials in Civil Engineering ◽

10.1061/(asce)mt.1943-5533.0003132 ◽

2020 ◽

Vol 32 (5) ◽

pp. 04020094

Author(s):

Yan Qiushi ◽

Lv Chenxu ◽

Sun Bowen ◽

Yang Lu

Keyword(s):

Stainless Steel ◽

Mechanical Behavior ◽

Elevated Temperatures ◽

Civil Engineering ◽

High Strain ◽

Strain Rates ◽

High Strain Rates ◽

Dynamic Mechanical ◽

Dynamic Mechanical Behavior

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Mechanical behavior of DP780 dual phase steel at a wide range of strain rates

Materials Research Express ◽

10.1088/2053-1591/aad7ea ◽

2018 ◽

Vol 5 (9) ◽

pp. 096519 ◽

Cited By ~ 2

Author(s):

Shengci Li ◽

Lan Zhang ◽

Hongjin Zhao ◽

Liang Qi ◽

Yonglin Kang

Keyword(s):

Mechanical Behavior ◽

Dual Phase Steel ◽

Dual Phase ◽

Strain Rates ◽

Wide Range

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On the mechanical behavior of a cryomilled Al–Ti–Cu alloy

Materials Science and Engineering A ◽

10.1016/s0921-5093(03)00284-3 ◽

2003 ◽

Vol 358 (1-2) ◽

pp. 318-323 ◽

Cited By ~ 18

Author(s):

Bing Q. Han ◽

Enrique J. Lavernia ◽

Farghalli A. Mohamed

Keyword(s):

Mechanical Behavior ◽

Cu Alloy

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Mechanical behavior of the Zr-1%Nb alloy at high strain rates and stress triaxiality from 0.33 to 0.5

Letters on Materials ◽

10.22226/2410-3535-2020-3-309-314 ◽

2020 ◽

Vol 10 (3) ◽

pp. 309-314

Author(s):

Natalia Skripnyak ◽

Maxim Chirkov

Keyword(s):

Mechanical Behavior ◽

High Strain ◽

Stress Triaxiality ◽

Strain Rates ◽

High Strain Rates

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Extension of Flow Behaviour and Damage Models for Cast Iron Alloys with Strain Rate Effect

10.21203/rs.3.rs-113055/v1 ◽

2020 ◽

Author(s):

Chuang Liu ◽

Dongzhi Sun ◽

Xianfeng Zhang ◽

Florence Andrieux ◽

Tobias Gerster

Keyword(s):

Cast Iron ◽

Constitutive Model ◽

Strain Rate ◽

Mechanical Behavior ◽

Damage Model ◽

Iron Alloys ◽

Strain Rate Range ◽

Strain Rates ◽

Damage Models ◽

Rate Dependent

Abstract Cast iron alloys with low production cost and quite good mechanical properties are widely used in the automotive industry. To study the mechanical behavior of a typical ductile cast iron (GJS-450) with nodular graphite, uni-axial quasi-static and dynamic tensile tests at strain rates of 10− 4, 1, 10, 100, and 250 s− 1 were carried out. In order to investigate the effects of stress state, specimens with various geometries were used in the experiments. Stress–strain curves and fracture strains of the GJS-450 alloy in the strain-rate range of 10− 4 to 250 s− 1 were obtained. A strain rate-dependent plastic flow law based on the Voce model is proposed to describe the mechanical behavior in the corresponding strain-rate range. The deformation behavior at various strain rates is observed and analyzed through simulations with the proposed strain rate-dependent constitutive model. The available damage model from Bai and Wierzbicki is extended to take the strain rate into account and calibrated based on the analysis of local fracture strains. The validity of the proposed constitutive model including the damage model was verified by the corresponding experimental results. The results show that the strain rate has obviously nonlinear effects on the yield stress and fracture strain of GJS-450 alloys. The predictions with the proposed constitutive model and damage models at various strain rates agree well with the experimental results, which illustrates that the rate-dependent flow rule and damage models can be used to describe the mechanical behavior of cast iron alloys at elevated strain rates.

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

Journal of Composite Materials ◽

10.1177/0021998320938850 ◽

2020 ◽

Vol 54 (30) ◽

pp. 4807-4819 ◽

Cited By ~ 1

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.

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