Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers

K. Arakawa; D. Nagoh; K. Takahashi

doi:10.1023/A:1007387417517

Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers

K. Arakawa, D. Nagoh, K. Takahashi

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor K_ID, crack velocity ȧ and acceleration ä were evaluated in the course of crack propagation to examine the effects of ȧ and ä on K_ID. Results showed that ȧ and ä were important factors in changing the values of K_ID, and for a constant ȧ the decelerating crack had a larger value of K_ID than the accelerating or re-accelerating crack. Also, it was found that K_ID could be expressed as two parametric functions of ȧ and ä for PMMA and epoxy specimens.

Original language	English
Pages (from-to)	305-313
Number of pages	9
Journal	International Journal of Fracture
Volume	83
Issue number	4
DOIs	https://doi.org/10.1023/A:1007387417517
Publication status	Published - Jan 1 1997

All Science Journal Classification (ASJC) codes

Computational Mechanics
Modelling and Simulation
Mechanics of Materials

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title = "Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers",

abstract = "Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor KID, crack velocity ȧ and acceleration {\"a} were evaluated in the course of crack propagation to examine the effects of ȧ and {\"a} on KID. Results showed that ȧ and {\"a} were important factors in changing the values of KID, and for a constant ȧ the decelerating crack had a larger value of KID than the accelerating or re-accelerating crack. Also, it was found that KID could be expressed as two parametric functions of ȧ and {\"a} for PMMA and epoxy specimens.",

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T1 - Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers

AU - Arakawa, K.

AU - Nagoh, D.

AU - Takahashi, K.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor KID, crack velocity ȧ and acceleration ä were evaluated in the course of crack propagation to examine the effects of ȧ and ä on KID. Results showed that ȧ and ä were important factors in changing the values of KID, and for a constant ȧ the decelerating crack had a larger value of KID than the accelerating or re-accelerating crack. Also, it was found that KID could be expressed as two parametric functions of ȧ and ä for PMMA and epoxy specimens.

AB - Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor KID, crack velocity ȧ and acceleration ä were evaluated in the course of crack propagation to examine the effects of ȧ and ä on KID. Results showed that ȧ and ä were important factors in changing the values of KID, and for a constant ȧ the decelerating crack had a larger value of KID than the accelerating or re-accelerating crack. Also, it was found that KID could be expressed as two parametric functions of ȧ and ä for PMMA and epoxy specimens.

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Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers

Abstract

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