Low-velocity heavy-mass impact response of slender metal foam core sandwich beam

• Published in: Composite structures Vol. 93; no. 6; pp. 1526 - 1537
• Main Authors: Qin, Qing Hua, Wang, T.J.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2011; Elsevier
• Subjects: Beams (structural); Clamping; Deflection; Dynamic tests; Dynamics; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Impact response; Low-velocity impact; Mathematical analysis; Mathematical models; Metal foam core; Overall bending; Physics; Sandwich beam; Solid mechanics; Static elasticity (thermoelasticity...); Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Sandwich beam; Overall bending; Low-velocity impact; Metal foam core; High strain; Vibration; Low speed; Sandwich structure; Quasi static theory; Porous material; Modeling; Finite element method; Metal foam; Kinetic energy; Mechanical shock
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2010.11.018

The objective of this work is to investigate the dynamic large deflection response of fully clamped metal foam core sandwich beam struck by a low-velocity heavy mass. Analytical solution and ‘bounds’ of dynamic solutions are derived, respectively. Also, finite element analysis is carried out to obtain the numerical solution of the problem. Comparisons of the dynamic, the quasi-static and numerical solutions for the non-dimensional maximum deflection of the sandwich beam with non-dimensional initial kinetic energy of the striker are presented for different cases of mass ratio, impact velocity and location. It is seen that the dynamic solution approaches the quasi-static one as the mass ratio of the striker to the beam is large enough, the quasi-static solution is in good agreement with the numerical results and both solutions lie in the ‘bounds’ of dynamic solutions. The quasi-static and numerical results for the impact force against the maximum deflection of the sandwich beam are obtained. It shows that the quasi-static solution can offer adequate accuracy to predict the low-velocity heavy-mass impact response of fully clamped sandwich beam.