Application of a modified strain transient dip test in the determination of the internal stresses of PVC under tension

Teoh, Swee Hin; Chuan, Cheng; Poo, A.N.

doi:10.1007/bf01233140

Cited by 8 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter can be done in the analysis of observations in strain transient dip tests, see, for example, Shinozaki and Sargent (1978), Teoh et al (1987), andBen Hadj Jai et al (2007). In these tests, a specimen is subjected to rapid stretching until tensile stress r reaches its initial value r 1 , which is preserved constant within some interval whose duration equals t 1 .…”

Section: Numerical Simulationmentioning

confidence: 99%

Time-dependent response of polypropylene after strain reversal

Drozdov

2010

International Journal of Solids and Structures

View full text Add to dashboard Cite

a b s t r a c tObservations are reported in tensile relaxation tests on specimens subjected to stretching up to various maximum strains max followed by retraction to various minimum strains . Experimental data show that shapes of relaxation curves on pre-loaded samples are strongly affected by strain increment D = max À : (i) when D is small, stress monotonically decays with time, (ii) with an increase in D, the relaxation process becomes non-monotonic, and (iii) at relatively large increments D, stress grows with time. A two-phase constitutive model is derived for the viscoelastic and viscoplastic responses of semicrystalline polymers under arbitrary deformations with small strains. Adjustable parameters in the stress-strain relations are found by fitting the observations. Numerical simulation demonstrates that the model correctly describes the time-dependent behavior of polypropylene subjected to cyclic preloading in creep and relaxation tests.

show abstract

Section: Numerical Simulationmentioning

confidence: 99%

Time-dependent response of polypropylene after strain reversal

Drozdov

2010

International Journal of Solids and Structures

View full text Add to dashboard Cite

show abstract

“…According to Teoh et al [21], there are three commonly used tests to measure the internal stress, including the strain transient dip test, the stress transient dip test, and stress relaxation methods. The CSR test measuring the internal stress of asphalt mixtures is based on the strain transient dip test.…”

Section: Measurement Of Internal Stress In Asphalt Bindersmentioning

confidence: 99%

“…Generally, three to five tests are enough to get accurate results for all test points. If the output results are still unacceptable after five tests, a regression method proposed by Teoh [21] should be used to avoid more tests. The purpose of the regression approach is to find a regression model taking .…”

Section: Step Numbermentioning

confidence: 99%

Characterization of Recovery in Asphalt Binders

Luo

Huang

et al. 2020

Materials

View full text Add to dashboard Cite

The recovery property of asphalt binders plays an important role in the performance and service life of asphalt pavements. Since the internal stress is the driving force for the recovery of asphalt binders, the accurate measurement of the internal stress is full of significance. Based on this rationale, this paper aims to measure the internal stress of asphalt binders using a creep and step-loading recovery (CSR) test and characterizing the recovery behaviors by the internal stress. One base asphalt binder and one styrene–butadiene–styrene (SBS)-modified binder are selected in this study. The key elements of the CSR test are carefully designed and its accuracy is verified in three aspects, including the loading conditions, the effect of disturbance by step-loads, and accuracy of measured internal stress. Then, a kinetics-based recovery model is proposed to evaluate and predict the recovery properties of asphalt binders from its causal relationship. The constant-rate recovery activation energy indicates a major difference with nondestructive and destructive loading conditions, while the fast-rate recovery activation energy keeps almost constant regardless of the loading conditions. After that, the healing activation energy is calculated by using the kinetics-based recovery model and the results indicate that SBS modified asphalt binder shows better healing abilities than a base binder.

show abstract