JDBM manuscript No. (will be inserted by the editor) Image-based inertial impact (IBII) tests for measuring the interlaminar shear moduli of composites J. Van Blitterswyk 1 · L. Fletcher 1 · F. Pierron 1 Received: date / Accepted: date Abstract The image-based inertial impact (IBII) test has previously shown that inertial effects generated with high-strain-rate loading can be used to measure the dynamic constitutive properties of composites at strain rates on the order of 1,600 s -1 . This work represents an important next step in exploring the potential of this concept with two tests presented where loading heterogeneity is exploited to measure the interlaminar shear modulus and stress-strain behaviour at high strain rates. The first test configuration used a short-beam with asymmetric loading to activate the shear behaviour. The virtual fields method (VFM) was used to directly identify the interlaminar shear modulus from heterogeneous full-field maps of strain and acceleration. Simulated experiments were used to optimise the test configuration, select optimal smoothing parameters, and quantify uncertainty from grid rotation on the shear modulus identifications. The test was validated experimentally with three different virtual fields identifying an average shear modulus ranging from 5.7 GPa to 5.9 GPa measured at 1,600 s -1 , representing a 16-19% increase compared to quasi-static J. Van Blitterswyk E-mail: [email protected] ORCID: 0000-0003-1186-2944 L. Fletcher E-mail: l.c.fl[email protected] ORCID: 0000-0003-2841-8030 F. Pierron E-mail: [email protected] ORCID: 0000-0003-2813-4994 1 Mechanical Engineering, University of Southampton, Southampton SO17 1BJ, UK
Image-based inertial impact (IBII) tests for measuring the interlaminar shear moduli of composites
Jun 24, 2023
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