A study on the constitutive equation of HC420LA steel subjected to high strain rates

Cui, Junjia; Wang, Qiong; Dong, Dongying; Jiang, Hao; Zhang, Xu; Li, Guangyao

doi:10.1557/jmr.2018.439

Cited by 4 publications

(6 citation statements)

References 23 publications

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“…The corresponding step size was 5. The strain was calculated result from the average displacement of a couple of adjacent calculation subsets, so the strain at the edge could not be determined [29,[34][35][36][37][38]. The tensile tests with the same loading conditions were repeated three times.…”

Section: Full-field Strain Analysismentioning

confidence: 99%

“…It could be seen that the fracture strain of P0 was larger than the ultimate average strain of the parallel length region at the same strain rate in Figure 5. In addition, the deviation between them was becoming more obvious due to the strain localization with the tensile processed [34]. The deformation mainly concentrated near the fracture crack or the location of possible failure, while the strain far from the fracture crack or the location of possible failure changed a little.…”

Section: Full-field Strain Analysismentioning

confidence: 99%

Section: Full-field Strain Analysismentioning

confidence: 99%

“…The specimen strains were determined using DIC and the evaluated strain values were obtained from the fracture strain of P 0 [25,34]. According to the true stress-strain curves of LGFRPPs, as presented in Figure 6, the LGFRPPs were strongly sensitive to the strain rates.…”

Section: Effect Of Strain Rate On the Mechanical Behaviorsmentioning

confidence: 99%

“…Since the interfacial debonding was the main micro-damage mode before specimen failure, the change of stress-strain response was mainly caused by strain rate sensitive failure behavior of interface properties which was attributed to the strain rate sensitivity of the fiber and matrix [39,40]. The specimen strains were determined using DIC and the evaluated strain values were obtained from the fracture strain of P0 [25,34]. According to the true stress-strain curves of LGFRPPs, as presented in Figure 6, the LGFRPPs were strongly sensitive to the strain rates.…”

Section: Effect Of Strain Rate On the Mechanical Behaviorsmentioning

confidence: 99%

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The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Cui

Wang

et al. 2019

Polymers

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Long glass fiber reinforced thermoplastic composites have been increasingly used in automotive parts due to their excellent mechanical properties and recyclability. However, the effects of strain rates on the mechanical properties and failure mechanisms of long glass fiber reinforced polypropylene composites (LGFRPPs) have not been studied systematically. In this study, the effects of strain rates (from 0.001 s−1 to 400 s−1) on the mechanical properties and failure mechanism of LGFRPPs were investigated. The results showed that ultimate strength and fracture strain of the LGFRPPs increased obviously, whereas the stiffness remained essentially unchanged with the strain rates from low to high. The micro-failure modes mainly consisted of fibers pulled out, fiber breakage, interfacial debonding, matrix cracking, and ductile to brittle (ductile pulling of fibrils/micro-fibrils) fracture behavior of the matrix. As the strain rates increased, the interfacial bonding properties of LGFRPPs increased, resulting in a gradual increase of fiber breakage at the fracture surface of the specimen and the gradual decrease of pull-out. In this process, more failure energy was absorbed, thus, the ultimate strength and fracture strain of LGFRPPs were improved.

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