Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Thermal Humid Mechanical Cycle

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Fauser, Dominik; Steeb, Holger, 2021, "Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Thermal Humid Mechanical Cycle", https://doi.org/10.18419/DARUS-2023, DaRUS, V1, UNF:6:kJCrJ2myXSEklpfIfr7AfQ== [fileUNF]

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Description	This data contains a Thermal Humid Mechanical Cycle (THMC) of Shape Memory Polymers (SMP). The SMP is a polyurethane-based Polymer, which is produced from SMP Technologies Inc. The SMP filament were processed with a 3D printer (Ultimaker 3, Ultimaker, Geldermarsen, Netherlands). The THMC is divided into a preheating step, a programming step and a stress-free recovery step. A preheating step was performed before the THMC, to relieve residual stresses stored by the manufacturing process. Then the temperature is set to T_trans = 55 °C and waited until the sample is in thermodynamic equilibrium. A displacement of s_max = 2.5 mm is performed and fixed. In the same step, the thermal chamber is set to cooling, by setting a lower temperature T_1 = 50 °C, to speed up the cooling process. In the next step the displacement s_max is kept fixed and the temperature is decreased to T_low = 30 °C. Once the sample is in thermodynamic equilibrium, the fixation is released and the stress free recovery step by setting the normal force to F_N = 0 N is performed. Humidity-dependent recovery of the initial geometry is performed by increasing the relative humidity to RH = 70 %. By performing a THMC, the thermal shape fixation and humidity-dependent shape recovery are captured. Here it can be seen that the programmed shape can also be recovered by higher humidity.
Subject	Chemistry; Computer and Information Science; Earth and Environmental Sciences; Engineering; Physics
Keyword	Thermo-Mechanical Cycle, Shape Memory Polymer, Shape Recovery, Shape Fixity
Related Publication	Fauser, Dominik; Steeb, Holger, (2021), "Influence of Humidity on the Rheology of Thermoresponsive Shape Memory Polymers", Journal of Materials Science (under review).
Data Generation	Experiment
License/Data Use Agreement	CC BY 4.0

	1 File
	thmc_SMP_0_70.tab Tabular Data - 1.6 MB Published Jun 22, 2021 85 Downloads 13 Variables, 24697 Observations UNF:6:kJCrJ2myXSEklpfIfr7AfQ==	Preview "thmc_SMP_0_70.tab" Access File File Access Public Download Options Comma Separated Values (Original File Format) Tab-Delimited RData Download Metadata DDI Codebook v2 Data File Citation EndNote XML RIS BibTeX

Citation Metadata

Persistent Identifier	doi:10.18419/DARUS-2023
Publication Date	2021-06-22
Title	Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Thermal Humid Mechanical Cycle
Author	University of Stuttgart, Institute of Applied Mechanics (CE)0000-0001-7989-9159 University of Stuttgart, Institute of Applied Mechanics (CE) & SC SimTech0000-0001-7602-4920
Point of Contact	Use email button above to contact. Steeb, Holger (University of Stuttgart, Institute of Applied Mechanics (CE) & SC SimTech)
Description	This data contains a Thermal Humid Mechanical Cycle (THMC) of Shape Memory Polymers (SMP). The SMP is a polyurethane-based Polymer, which is produced from SMP Technologies Inc. The SMP filament were processed with a 3D printer (Ultimaker 3, Ultimaker, Geldermarsen, Netherlands). The THMC is divided into a preheating step, a programming step and a stress-free recovery step. A preheating step was performed before the THMC, to relieve residual stresses stored by the manufacturing process. Then the temperature is set to T_trans = 55 °C and waited until the sample is in thermodynamic equilibrium. A displacement of s_max = 2.5 mm is performed and fixed. In the same step, the thermal chamber is set to cooling, by setting a lower temperature T_1 = 50 °C, to speed up the cooling process. In the next step the displacement s_max is kept fixed and the temperature is decreased to T_low = 30 °C. Once the sample is in thermodynamic equilibrium, the fixation is released and the stress free recovery step by setting the normal force to F_N = 0 N is performed. Humidity-dependent recovery of the initial geometry is performed by increasing the relative humidity to RH = 70 %. By performing a THMC, the thermal shape fixation and humidity-dependent shape recovery are captured. Here it can be seen that the programmed shape can also be recovered by higher humidity.
Subject	Chemistry; Computer and Information Science; Earth and Environmental Sciences; Engineering; Physics
Keyword	Thermo-Mechanical Cycle Shape Memory Polymer https://www.wikidata.org/wiki/Q906777 (Wikidata) Shape Recovery Shape Fixity
Related Publication	Fauser, Dominik; Steeb, Holger, (2021), "Influence of Humidity on the Rheology of Thermoresponsive Shape Memory Polymers", Journal of Materials Science (under review).
Language	English
Producer	University of Stuttgart, Institute of Applied Mechanics (CE) - Chair for Continuum-Mechanics https://www.mib.uni-stuttgart.de/en/ University of Stuttgart - Cluster of Excellence EXC 2075 "SimTech" https://www.simtech.uni-stuttgart.de/
Production Date	2021-03-25
Production Location	University of Stuttgart, Institute of Applied Mechanics (CE), Stuttgart, 70569, Germany
Contributor	Data Collector: Fauser, Dominik Rights Holder: Steeb, Holger
Depositor	Fauser, Dominik
Deposit Date	2021-06-09
Related Material	The material is a polyurethane-based Shape Memory Polymer. Information about the material can be found in the material description of the company SMP Technologies Inc. or in publications, e.g. Huang, 2010.
Related Dataset	Fauser, Dominik; Steeb, Holger, 2021, "Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Dynamic Mechanical Thermal Humidity Analysis", https://doi.org/10.18419/darus-2021, DaRUS. Fauser, Dominik; Kuhn, Moritz; Steeb, Holger, 2021, "Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Diffusion measurements", https://doi.org/10.18419/darus-2024, DaRUS.

Process Metadata

Processing Methods	THMC
Method Parameters	Rectangular sample Sample width (w) [mm] : 9.36 Sample thickness (t) [mm] : 1.35 Sample length (l) [mm] : 24.373 Pre Heat step: Interval 1 Time settings (data points) : 56 Time settings (point duration) [min] : 1 Time settings (interval duration) [min] : 56 Force (F_N) [N] : 0 Temperature start (T_start) [°C] : 25 Temperature end (T_high) [°C] : 80 Interval 2 Time settings (data points) : 26 Time settings (Point duration) [min] : 1 Time settings (interval duration) [min] : 26 Temperature start (T_high) [°C] : 80 Temperature end (T_trans) [°C] : 55 Interval 3 Time settings (data points) : 26 Time settings (point duration) [min] : 1 Time settings (interval duration) [min] : 10 Temperature (T_trans) [°C] : 55 Programming step Interval 1 Time setting [data points] : 4 Displacement (s) [mm] : 0 Interval 2 Time settings (data points) : 101 Time settings (s) [point duration] : 0.1 Time settings (interval duration) [s] : 10.1 Displacement start (s_start) [mm] : 0 Displacement end (s_max) [mm] : 2.5 Temperature start (T_trans) [°C] : 55 Temperature end (T_1) [°C] : 50 Interval 3 Time settings (data points) : 800 Time settings (point duration) [s] : 0.300575 Time settings (interval duration) [s] : 240.3 Displacement (s_max) [mm] : 2.5 Temperature (T_1) [°C] : 50 Temperature (T_low) [°C] : 30 Interval 4 Time settings (data points) : 2000 Time settings (point duration) [s] : 0.375 Time settings (interval duration) [s] : 750 Displacement (s_max) [mm] : 2.5 Temperature (T_low) [°C] : 30 Free-recovery step Interval 5 Time settings (data points) : 250 Time settings (point duration) [s] : 2 Time settings (interval duration) [s] : 500 Force (F_N) [N] : 0 Temperature (T_low) [°C] : 30 Interval 6 Time settings (data points) : 66 Time settings (point duration) [s] : 0.381957 Time settings (interval duration) [s] : 25.2092 Relative Humidity start (RH_low) [%] : 0 Relative Humidity end (RH_high) [%] : 70 Temperature (T_low) [°C] : 30 Interval 7 Time settings (data points) : 30000 Time settings (point duration) [s] : 20 Time settings (interval duration) [s] : 600000 Force (F_N) [N] : 0 Relative Humidity (RH_high) [%] : 70 Temperature (T_low) [°C] : 30
Software	Anton Paar RheoCompass™ V1.25.422-Release
Instruments	MCR 502 TwinDrive-ready (Rheometer, Anton-Paar) CTD180 Humidity Kit (Thermal and humidity chamber, Anton-Paar) MHG 100 (Humidity generator, ProUmid)

Engineering Metadata

Data Generation	Experiment
Measured Variables	Force; Programming step (F_N) [N] Displacement; Free-recovery step (s) [mm] Extensional strain (epsilon) [%] Temperature (T) [°C] Relative Humidity (RH) [%] Gap [mm]
Controlled Variables	Displacement; Programming step (s_max) [mm] : 2.5 Force; Free-recovery step (F_N) [N] : 0

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