Modeling of damage behaviors of high impact polystyrene

Tang, Chak Yin; Tai, Wei Hua; Lee, Wing Bun

doi:10.1016/s0013-7944(96)00036-7

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…In general, the damage process in polymers is regarded as the formation and development of microdefects and crazes within an initially perfect material. The material remains the same but its macroscopic properties change with its microscopic geometry [10]. In polymers, craze formation is generally believed to be one of the main causes of material damage, which is both a localized yielding process and the first stage of fracture.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Failure Model for Polymeric Compliant Systems

Akano

Fakinlede

2013

ISRN Polymer Science

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Fatigue analysis and lifetime evaluation are very important in the design of compliant mechanisms to ensure their safety and reliability. Earlier models for the fatigue prediction of compliant mechanisms are centred on repeated and reversed stress cycles. Compliant mechanisms (CMs) are now being applied to situations where the fatigue is caused by random varying stress cycles. It is, therefore, necessary to consider fatigue resulting from random varying stress cycles and damage caused to the compliant material. A continuum damage mechanics (CDM) model is proposed to assess the fatigue life of polymeric compliant mechanisms. The elastic strain energy is computed on the basis of a nearly incompressive hyperelastic constitution. The damage evolution equation is used to develop a mathematical formula that describes the fatigue life as a function of the nominal strain amplitude under cyclic loading. Low density polypropylene (LDP) is used for the fatigue tests conducted under displacement controlled condition with a sine waveform of 10 Hz. The results from the theoretical formula are compared with those from the experiment and fatigue software. The result from the prediction formula shows a strong agreement with the experimental and simulation results.

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Section: Introductionmentioning

confidence: 99%

Fatigue Failure Model for Polymeric Compliant Systems

Akano

Fakinlede

2013

ISRN Polymer Science

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“…The continuum damage mechanics (CDM) is used for evaluating the degradation of mechanical properties due to the initiation and growth of microcracks and microcavities 7,8 . Recently, the CDM was applied to evaluating of the damage behavior of some rubber-modifi ed plastics 9,10 ; however, there are few studies on the damage behavior of adhesively bonded joints based on the CDM 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Estimation of Adhesively Bonded Scarf Joints Based on a Continuum Damage Mechanics Model

Imanaka¹,

Taniguchi²,

Hamano³

et al. 2005

Polymers and Polymer Composites

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An estimation method of fatigue strength of adhesively bonded joints with various stress triaxialities in the adhesive layer has been proposed based on a damage evolution model for high cycle fatigue. To realize various triaxial stress states, fatigue test was conducted for adhesively bonded butt and scarf joints with various scarf angles bonded by a rubber-modified epoxy adhesive. An equation for estimating the damage evolution in the adhesive layer of the butt and scarf joints was derived from the damage model, where undefined parameters in the equation were determined by comparing the experimentally obtained damage evolution curves of the butt joints with the estimated damage evolution curves. Furthermore, an equation for the estimation of fatigue strength was derived under the assumption that fatigue failure occurs when the damage variable reaches to a critical value. When compared the experimental S-N data of scarf joints with the estimated ones, the estimated fatigue strengths agree well with the experimental data with various scarf angles. This finding suggests that the CDM model is applicable for estimating fatigue strength of adhesively bonded joints with different stress triaxialities.

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“…Continuum damage mechanics (CDM) has been used to analyze such a damage behaviour caused by initiation and growth of microcracks and microcavities [7,8]. Recently, the CDM was applied to analyze the damage development processes in some rubbermodi ed plastics [9,10]. However, there are only a few studies available on damage behaviour of adhesively bonded joints utilizing the CDM [11,12].…”

Section: Introductionmentioning

confidence: 99%

Fatigue damage evaluation of adhesively bonded butt joints with a rubber-modified epoxy adhesive

Imanaka¹,

Hamano²,

Morimoto³

et al. 2003

Journal of Adhesion Science and Technology

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A damage evolution of adhesively bonded butt joints with a rubber-modi ed adhesive has been investigated under cyclic loading. An isotropic continuum damage model coupled with a kinetic law of damage evolution was applied to the butt joint. To solve the kinetic law, analytic and numerical methods were tried: the former solution was derived with some simpli cations and the latter one was derived rigorously without simplications. On comparing the analytic solutions with the numerical ones, it was con rmed that differences in the two solutions were small. Furthermore, the estimated S-N curves based on the analytic equation agreed well with experimental data.

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Modeling of damage behaviors of high impact polystyrene

Cited by 10 publications

References 5 publications

Fatigue Failure Model for Polymeric Compliant Systems

Fatigue Failure Model for Polymeric Compliant Systems

Fatigue Life Estimation of Adhesively Bonded Scarf Joints Based on a Continuum Damage Mechanics Model

Fatigue damage evaluation of adhesively bonded butt joints with a rubber-modified epoxy adhesive

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