High strain rate compressive behavior of PMMA

Acharya, Saikat; Mukhopadhyay, Anoop Kumar

doi:10.1007/s00289-013-1050-9

Cited by 31 publications

(15 citation statements)

References 23 publications

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“…There are several glassy polymers that have been extensively studied at high strain rate in the literature, including polymethylmethacrylate (PMMA) [16,95,100,[123][124][125][126][127][128][129][130][131][132], polycarbonate (PC) [15, 18-20, 100, 110, 124, 126, 127, 133-136], polyvinylchloride (PVC) [137,138] and varying classes of epoxy [23,74,[139][140][141]. The large number of studies on a ''single'' material indicates that it is critical to understand the pedigree of the polymer being tested, including processing history and storage.…”

Section: Glassy Amorphous Polymersmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

285

121

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The mechanical properties of polymers are becoming increasingly important as they are used in structural applications, both on their own and as matrix materials for composites. It has long been known that these mechanical properties are dependent on strain rate, temperature, and pressure. In this paper, the methods for dynamic loading of polymers will be briefly reviewed. The high strain rate mechanical properties of several classes of polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers will be reviewed. Additionally, time-temperature superposition for rate dependent large strain properties and pressure dependence in polymers will be discussed. Constitutive modeling and shock properties of polymers will not be discussed in this review.

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Section: Glassy Amorphous Polymersmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

285

121

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“…The localized heating ahead of the crack tip is caused by the fast straining of macromolecules in the fracture process zone [5]. PMMA's behavior under high strain rate impact by using a split Hopkinson pressure bar was studied in [6]. The SEM photomicrographs of fracture surfaces showed some local melting.…”

Section: Introductionmentioning

confidence: 99%

“…1). The estimated maximum temperature generated at the crack tip was around 530 [6]. The temperature rise near the crack tip in PMMA was studied using ℃ temperature sensitive liquid crystal film and infrared detector in [7].…”

Section: Introductionmentioning

confidence: 99%

Uncovering the dynamic fracture behavior of PMMA

Mehrmashhadi¹,

Wang²,

Bobaru³

2019

Preprint

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Experimental investigations of dynamic crack propagation in PMMA induced by impact show single cracks running at around 300-400 m/s. Existing numerical models for simulating dynamic fracture in PMMA consistently produce crack propagation speeds significantly higher than those measured experimentally. Here we uncover the reason for this puzzle by showing that localized softening in the fracture process zone (caused by heating due to high strain rates in front of the crack tip), leads to crack propagation speeds that match the observed ones. We introduce a new constitutive model in our peridynamic formulation for PMMA to account for material softening in the crack tip region. With the new model, the computed crack speed and crack length evolution match very closely those found experimentally.

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“…Moreover, the glass-like polymers also have an obvious rate dependency of mechanical properties [1,38,39], which directly affects the dynamic strength and determines the structure design, application and reliability for safety and security.…”

Section: Glass-like Polymersmentioning

confidence: 99%