TY - JOUR
T1 - Dynamic fracture of expanding cavities in nonlinear soft solids
AU - Milner, Matt P.
AU - Hutchens, Shelby B.
N1 - Funding Information:
The authors acknowledge start-up funding provided by the Mechanical Science and Engineering Department at UIUC.
Publisher Copyright:
Copyright © 2021 by ASME.
PY - 2021/8
Y1 - 2021/8
N2 - Recent experimental observation [Milner, M. P., and Hutchens, S. B., 2021, “Multi-Crack Formation in Soft Solids During High Rate Cavity Expansion,” Mech. Mater., 154, p. 103741] suggests that crack formation during rapid cavity expansion in low modulus, highly deformable solids depends on the ratio of the rate of expansion and the acoustoelastic wave speed, similar to observations in rock and metal [Grady, D., and Kipp, M., 1987, “Dynamic Rock Fragmentation,” Fracture Mechanics of Rock, Elsevier, p. 429475]. Here, we explore the effect of material nonlinearity on predictions of the number of cracks formed at the cavity surface. We find that nonlinearity influences crack formation only when the cavity size normalized elasto-fracture length is greater than one and the cavity’s rate of expansion is greater than the acoustoelastic wave speed. The sensitivity of these predictions for two idealized fracture geometries, either a spherical damaged zone or discrete cracks, suggests a direction for further experimentation that may illuminate crack formation mechanisms in soft solids under dynamic loading.
AB - Recent experimental observation [Milner, M. P., and Hutchens, S. B., 2021, “Multi-Crack Formation in Soft Solids During High Rate Cavity Expansion,” Mech. Mater., 154, p. 103741] suggests that crack formation during rapid cavity expansion in low modulus, highly deformable solids depends on the ratio of the rate of expansion and the acoustoelastic wave speed, similar to observations in rock and metal [Grady, D., and Kipp, M., 1987, “Dynamic Rock Fragmentation,” Fracture Mechanics of Rock, Elsevier, p. 429475]. Here, we explore the effect of material nonlinearity on predictions of the number of cracks formed at the cavity surface. We find that nonlinearity influences crack formation only when the cavity size normalized elasto-fracture length is greater than one and the cavity’s rate of expansion is greater than the acoustoelastic wave speed. The sensitivity of these predictions for two idealized fracture geometries, either a spherical damaged zone or discrete cracks, suggests a direction for further experimentation that may illuminate crack formation mechanisms in soft solids under dynamic loading.
KW - Dynamics
KW - Elasticity
KW - Flow
KW - Fracture
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U2 - 10.1115/1.4051431
DO - 10.1115/1.4051431
M3 - Article
AN - SCOPUS:85121300663
SN - 0021-8936
VL - 88
JO - Journal of Applied Mechanics, Transactions ASME
JF - Journal of Applied Mechanics, Transactions ASME
IS - 8
M1 - 081008
ER -