Fading memory of deformation history in carbon black-filled thermoplastic elastomers
Yükleniyor...
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
Observations are reported on a carbon black reinforced thermoplastic elastomer in multistep uniaxial tensile cyclic tests with a mixed deformation program (oscillations between maximum elongation ratios k(max) and various minimum stresses Amin with km, monotonically increasing with number of cycles n). Fading memory of deformation history is demonstrated: when specimens are subjected to two loading programs that differ along the first n 1 cycles of deformation and coincide afterwards, their stress strain diagrams become identical starting from the nth cycle. A constitutive model is developed in cyclic viscoplasticity with finite deformations, and its adjustable parameters are found by fitting the observations. Ability of the stress strain relations to describe the fading memory phenomenon and to predict the mechanical response of polymer composites in multi-step cyclic tests with large strains is confirmed by numerical simulation. (C) 2016 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Thermoplastic elastomer, Cyclic deformation, Finite viscoplasticity, Fading memory, Constitutive model
Kaynak
Polymer Testing
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
58
