Investigation of the strain‐rate‐dependent mechanical behavior of a photopolymer matrix composite with fumed nano‐silica filler

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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Transient Response of Strain Rate Dependent Polymer Matrix Composite Laminates

46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference ◽

10.2514/6.2005-1828 ◽

2005 ◽

Author(s):

Linfa Zhu ◽

Aditi Chattopadhyay ◽

Robert Goldberg

Keyword(s):

Strain Rate ◽

Matrix Composite ◽

Transient Response ◽

Polymer Matrix ◽

Composite Laminates ◽

Polymer Matrix Composite ◽

Rate Dependent

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Influence of ordered L12 precipitation on strain-rate dependent mechanical behavior in a eutectic high entropy alloy

Scientific Reports ◽

10.1038/s41598-019-42870-y ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 19

Author(s):

Bharat Gwalani ◽

Sindhura Gangireddy ◽

Yufeng Zheng ◽

Vishal Soni ◽

Rajiv S. Mishra ◽

...

Keyword(s):

Strain Rate ◽

Mechanical Behavior ◽

High Entropy Alloy ◽

High Entropy ◽

Rate Dependent

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The temperature- and strain rate-dependent mechanical behavior of a polycrystalline galena ore

Economic Geology ◽

10.2113/gsecongeo.71.2.513 ◽

1976 ◽

Vol 71 (2) ◽

pp. 513-525 ◽

Cited By ~ 31

Author(s):

B. K. Atkinson

Keyword(s):

Strain Rate ◽

Mechanical Behavior ◽

Rate Dependent

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Rate-Dependent Behavior and Constitutive Model of Polycarbonate at Strain Rate from 10-5 to 103 S-1

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.434 ◽

2011 ◽

Vol 117-119 ◽

pp. 434-437

Author(s):

Wen Jun Hu ◽

Xi Cheng Huang ◽

Fang Ju Zhang ◽

Cheng Jun Chen

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Mechanical Behavior ◽

Strain Rate Range ◽

Strain Rates ◽

Temperature Dependent ◽

Static Tests ◽

Rate Range ◽

Rate Dependent ◽

Dependent Behavior

Uni-axial quasi-static tests at strain rates 10-5, 10-4, 10-3,10-2 and 10-1 s-1 and dynamic compressive tests at strain rates 1679, 2769,5000 and 8200 s-1 have been carried out to study the mechanical behavior for polycarbonate used in the avigation industry. The stress–strain curves of polycarbonate in the strain-rate range from 10-5 to 8200 s-1 have been obtained. The effects of the strain rate on yield phenomenon and rate-dependent mechanical behavior are discussed. A plastic flow law based on the DSGZ rate-temperature-dependent constitutive model was used to describe the mechanical behavior of polycarbonate in the strain-rate range from 10-5 to 103 s-1. The results at the six strain rates are in excellent agreement with the experimental data, which illustrates that the constitutive model can describe the mechanical behavior for polycarbonate at low and high strain rates perfectly.

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Dynamic Mechanical Behavior of Two Fiber-Reinforced Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.525-526.261 ◽

2012 ◽

Vol 525-526 ◽

pp. 261-264

Author(s):

Y.Z. Guo ◽

X. Chen ◽

Xi Yun Wang ◽

S.G. Tan ◽

Z. Zeng ◽

...

Keyword(s):

Compressive Strength ◽

Strain Rate ◽

Mechanical Behavior ◽

High Speed ◽

Split Hopkinson Pressure Bar ◽

Hopkinson Pressure Bar ◽

Stress Strain ◽

Rate Dependent ◽

Dynamic Loadings ◽

Axial Splitting

The mechanical behavior of two composites, i.e., CF3031/QY8911 (CQ, hereafter in this paper) and EW100A/BA9916 (EB, hereafter in this paper), under dynamic loadings were carefully studied by using split Hopkinson pressure bar (SHPB) system. The results show that compressive strength of CQ increases with increasing strain-rates, while for EB the compressive strength at strain-rate 1500/s is lower then that at 800/s or 400/s. More interestingly, most of the stress strain curves of both of the two composites are not monotonous but exhibit double-peak shape. To identify this unusual phenominon, a high speed photographic system is introduced. The deformation as well as fracture characteristics of the composites under dynamic loadings were captured. The photoes indicate that two different failure mechanisms work during dynamic fracture process. The first one is axial splitting between the fiber and the matrix and the second one is overall shear. The interficial strength between the fiber and matrix, which is also strain rate dependent, determines the fracture modes and the shape of the stress/strain curves.

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