Dynamic Modulus of Hard Polyurethane Foams.

Adachi, Hiromasa; Hasegawa, Teruo; Enomoto, Koji

doi:10.1295/koron.57.552

Cited by 2 publications

(4 citation statements)

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“…In contrast, the amplitude in the vibration test is very small and it does not induce the bending of cell wall. 41–45 Hains et al. measured the MOE values of solid wood (spruce and fir), duralumin, and nylon by static bending and vibration tests.…”

Section: Resultsmentioning

confidence: 99%

“…Adachi and Hasegawa suggested that the difference between the MOE values obtained from the static tension and dynamic tests was not significant because the bending of cell wall did not influence on the MOE value. 41,42 Further research is required on the effect of testing method while comparing the measurement values of MOE and SM.…”

Section: Resultsmentioning

confidence: 99%

“…In the compression test, the applied load is large and it induces the bending of cell wall. [41][42][43][44][45] Because of the bending deformation of cell wall, whole deformation of the specimen is enhanced. In contrast, the amplitude in the vibration test is very small and it does not induce the bending of cell wall.…”

Section: Young's Modulus (Mpa)mentioning

confidence: 99%

“…In contrast, the amplitude in the vibration test is very small and it does not induce the bending of cell wall. [41][42][43][44][45] Hains et al measured the MOE values of solid wood (spruce and fir), duralumin, and nylon by static bending and vibration tests. 45 They found that the difference between the MOE values obtained from the different tests were significant in the solid wood, which has a cell structure.…”

Section: Young's Modulus (Mpa)mentioning

confidence: 99%

See 3 more Smart Citations

Measurement of the Young’s modulus and shear modulus of extruded polystyrene foam by the longitudinal and flexural vibration methods

Yoshihara

Ataka

Maruta

2016

Journal of Cellular Plastics

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The Young’s modulus and shear modulus of extruded polystyrene foam were obtained by measurements using the longitudinal and flexural vibration methods on specimens with various lengths and performing a subsequent numerical analysis on the test data. In addition to the vibration tests, ISO 844 compression and ASTM C273/C273M-11 shear tests were conducted, and the results were compared with those obtained from the vibration tests. The Young’s modulus values could be measured accurately by the longitudinal and flexural vibration tests while reducing the effects of the specimen configuration. In contrast, the shear modulus value was often dependent on the specimen configuration. The Young’s modulus and shear modulus values obtained from the vibration tests were often higher than those obtained from the standardised tests because the bending of cell wall is not induced in the vibration test. Although a provisional method for reducing the influence of the specimen configuration was proposed based on the numerical results, further research is required to measure the elastic modulus of extruded polystyrene foam accurately.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Young's Modulus (Mpa)mentioning

confidence: 99%

Section: Young's Modulus (Mpa)mentioning

confidence: 99%

See 2 more Smart Citations

Measurement of the Young’s modulus and shear modulus of extruded polystyrene foam by the longitudinal and flexural vibration methods

Yoshihara

Ataka

Maruta

2016

Journal of Cellular Plastics

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Evaluation of Thermal Endurance Characteristics of Hard Polyurethane Foams by Dynamic Compression Modulus

Adachi

Hasegawa

2004

J. Soc. Rheol., Jpn

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For evaluation of thermal endurance in foamed plastics, temperature and time characteristics of compression dynamic modulus of four hard polyurethane foams were investigated by the dynamic viscoelastic measurements. Compression dynamic modulus of each polyurethane foams lessened gradually with time, probably due to a decrease of inner pressure of closed-cell, which influenced stiffness of foam skeletons. Logarithm of time t, at which the compression dynamic modulus came to be 50% of its initial value at the beginning of the dynamic measurement has been found to be a linear function of reciprocal of the absolute temperature T −1. Thermal endurance characteristics can be evaluated from the linear relations between log t and T −1.

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Dynamic Modulus of Hard Polyurethane Foams.

Cited by 2 publications

References 0 publications

Measurement of the Young’s modulus and shear modulus of extruded polystyrene foam by the longitudinal and flexural vibration methods

Measurement of the Young’s modulus and shear modulus of extruded polystyrene foam by the longitudinal and flexural vibration methods

Evaluation of Thermal Endurance Characteristics of Hard Polyurethane Foams by Dynamic Compression Modulus

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