Statistical Evolution of Microvoids in Particle-Filled Polymers under Plate Impact

Abstract:

Statistical evolution of microvoids in a particle-filled polymer under plate impact is theoretically studied. Based on the constitutive equations of the material recently obtained by the authors, the velocity of the propagation of one-dimensional strain wave caused by the plate impact is analyzed, and the evolution of the microdamage is calculated. It is shown that the microvoid evolution is influenced by several factors, such as particle size-dispersity, average radius of particles, and the adhesive energy of the interface. The numerical results show that there is a sensitive crest of the impact velocity for microvoid evolution. If the impact velocity reaches the critical value corresponding to the peak value of the crest, the microvoids accumulation will increase rapidly, and it may lead to the dynamic failure of the material.

• Periodical: Key Engineering Materials (Volume 312)
• Pages: 111-116
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.312.111
• Online since: June 2006
• Authors: Jian Kang Chen, Zhu Ping Huang, Shu-Lin Bai
• Keywords: Damage, Dynamic Failure, Particle-Filled Polymer, Statistical Evolution of Microvoids

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[2] 0 2. 5 3. 0 3. 5 4. 0.

260.

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270 fvN ω fvN V = 132 (m/s) γ=0. 1 J/m 2.

0 0. 1 0. 2 0. 3 0. 4 0. 5.

260.

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270 fvN γ(J/m2) fvN v = 132 (m/s) ω=2. 5 Fig. 2. The effect of the interfacial adhesive energy γ on vNf 0. 0 2. 0x10 -5.

[4] 0x10-5.

[6] 0x10 -5.

[8] 0x10-5.

260.

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270 fvN a0 (m) fvN V = 132 (m/s) γ= 0. 1 (J/m 2 ) ω=2. 5 Fig. 3. The effect of the average size of second phase particles 0a on vNf 0 40 80 120 160 200.

00.

05.

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30 fvN V (m/s) fvN ω = 2. 0 γ = 0. 1 J/m2 fP0 = 0. 3 Fig. 4. The effect of the impact velocity on vNf 0 50 100 150 200.

000.

001.

002.

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005 dfvN/dv V(m/s) dfvN/dv ¦Ø=2. 0 γ=0. 1J/m 2 fP0=0. 3 Fig. 5. The effect of the impact velocity v on vfvN /dd.