An experimental and modeling investigation on the effects of temperature and strain rate on the tensile-deformation behavior of TB991 weld sealant

Zhang, Jun; Zhang, Xin; Wang, Zhuang zhang; Li, Hai Yu

doi:10.1007/s11043-021-09536-7

Cited by 6 publications

(4 citation statements)

References 32 publications

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“…It is due to the higher stored internal energy by a nonequilibrated polymer system to altered macromolecule bond length and angle. [ 41,43 ] For this purpose, the maximum value of the recovery stress for the warm‐programmed sample is obtained at a lower temperature, and the increase in temperature causes an increase in the stress relaxation rate.…”

Section: Resultsmentioning

confidence: 99%

Influence of Programming and Recovery Parameters on Compressive Behaviors of 4D‐Printed Biocompatible Polyvinyl Chloride or Vinyl–Poly(ε‐Caprolactone) Blends

Rahmatabadi,

Aberoumand,

Soltanmohammadi

et al. 2024

Adv Eng Mater

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This paper introduces a new class of bio‐compatible shape memory polymers (SMPs) through blending PVC and PCL. The compressive shape‐memory behaviors of 4D‐printed SMP PVC with 5 and 10%wt of PCL are studied in detail. In this respect, a set of experiments are carried out to understand thermo‐mechanical responses of PVC‐PCL blends under various shape memory parameters like programming temperature, load holding time, applied strain and recovery temperature. DMTA and SEM imaging are also performed to provide thermal and morphological analyses. It is found that by raising the recovery temperature from 45 to 65°C, the shape recovery ratio increases from 5.63MPa to 7.92MPa when the PVC‐PCL10 is programmed via the hot programming protocol. The highest level of shape fixity (100%) and the best performance of stress relaxation are achieved for hot programming sample, while the highest shape recovery ratio (100%) is obtained for cold programming. By applying the load holding time, the amount of shape fixity can reach from 88.14% to 100%. Results of this research are expected to provide an insightful understanding of the shape memory behaviors of PVC‐PCL and be instrumental for 4D printing and programming of shape adaptive structures like shape‐memory intervertebral cages as spinal support devices.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Influence of Programming and Recovery Parameters on Compressive Behaviors of 4D‐Printed Biocompatible Polyvinyl Chloride or Vinyl–Poly(ε‐Caprolactone) Blends

Rahmatabadi,

Aberoumand,

Soltanmohammadi

et al. 2024

Adv Eng Mater

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“…By increasing the amount of strain (beyond the linear and yielding region), the polymer chains are stretched towards the loading direction, and in this way, they are separated from their equilibrium state. By increasing the applied load or keeping the polymers in a stretched state, more instability is created in the polymer equilibrium system [37]. For this reason, the value of shape fixity is higher for more deformed samples.…”

Section: Shape Memory Effectmentioning

confidence: 99%

4D printing of porous PLA-TPU structures: effect of applied deformation, loading mode and infill pattern on the shape memory performance

Rahmatabadi,

Soltanmohammadi,

Aberoumand

et al. 2024

Phys. Scr.

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For the first time, the synergy of shape memory polymer (SMP) blending, 4D printing, and cold programming (CP) are investigated for improving the functionality of the shape memory effect (SME), increasing medical applications of porous structures, direct programming, and removing current limitations. Porous PLA-TPU structures with different printing patterns and applied deformation were CPed under constrained and non-constrained compression modes at room temperature and were recovered in the rubbery phase. The shape fixity and shape recovery ratios were calculated and the cross-section morphology was examined with Scanning Electron Microscopy (SEM). The shape fixity values were in the range of 39.75-71.27%, while almost complete shape recovery ratios (100%) were observed for all porous samples. Low shape fixity ratios can be justified due to the existence of two steps of spring-back and structure relaxation after unloading in cold programming, resulting from elastic and viscoelastic behavior. The glass transition temperature of the PLA-TPU blend was 69 °C and shifted to raw materials, indicating the possibility of some interaction between the two components. SEM images showed the uniform distribution of TPU particles and matrix-droplet morphology in the PLA-TPU blend and after printing TPU droplets were stretched and the sea-island morphology was observed in some segments.

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“…The main chemical composition and physical parameter of the weld sealant are shown in reference. 36 A special specimen manufacture tool was used to cut out the required specimen dimensions according to ASTM standard D-412A. Detailed preparation of the testing specimens can be referred to our previous study.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…TB991 weld sealant was selected to manufacture the testing specimens, which was provided by Shiji Tebang New Materials Co., Ltd, Hunan, China. The main chemical composition and physical parameter of the weld sealant are shown in reference 36 . A special specimen manufacture tool was used to cut out the required specimen dimensions according to ASTM standard D‐412A.…”

Section: Materials and Experimentsmentioning

confidence: 99%

Experimental and theoretical investigation on mechanical behaviors of TB991 weld sealant under cyclic loading

Zhang

et al. 2022

Fatigue Fract Eng Mat Struct

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The mechanical behaviors of TB991 weld sealant under cyclic loading conditions were experimentally investigated. The evolution of relaxation stress, cyclic softening, and dissipated energy was evaluated with the effect of strain amplitude and mean strain. The experimental results showed that the stress–strain response curves of the first loading‐unloading and cyclic loading‐unloading were significantly different. The phenomenon of stress relaxation and cyclic softening occurred under cyclic strain loading conditions. Furthermore, the relaxation stress and dissipated energy decreased rapidly during the initial cyclic loading and then steadily decreased with the increase of cycle number, while the cyclic softening increased rapidly at first and then steadily. Besides, a viscoelastic constitutive model was proposed which can describe the different shapes of stress–strain curve between the initial loading‐unloading and the cyclic loading‐unloading and also considers the cyclic stress relaxation and cyclic softening of the materials under cyclic loading condition. Comparisons between the numerical results and the experimental data demonstrated that the proposed model can better describe the mechanical behavior of TB991 weld sealant under cyclic loading conditions.

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An experimental and modeling investigation on the effects of temperature and strain rate on the tensile-deformation behavior of TB991 weld sealant

Cited by 6 publications

References 32 publications

Influence of Programming and Recovery Parameters on Compressive Behaviors of 4D‐Printed Biocompatible Polyvinyl Chloride or Vinyl–Poly(ε‐Caprolactone) Blends

Influence of Programming and Recovery Parameters on Compressive Behaviors of 4D‐Printed Biocompatible Polyvinyl Chloride or Vinyl–Poly(ε‐Caprolactone) Blends

4D printing of porous PLA-TPU structures: effect of applied deformation, loading mode and infill pattern on the shape memory performance

Experimental and theoretical investigation on mechanical behaviors of TB991 weld sealant under cyclic loading

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