Damping behaviour of aluminium/short glass fibre composites

Lightweight NiTi shape memory alloy based composites with high damping capacity and high strength

“…Usually, traditional damping materials, for example, polymers, rubbers and their composites, damping metallic materials and their composites, etc., do not possess high damping capacity and high mechanical property simultaneously, that is, a material with high damping capacity often exhibits low mechanical strength and vice versa, especially under cyclic and impact loads. Hence, there is a strong demand to develop novel damping materials that can couple high damping capacity and good mechanical properties [1][2][3][4][5].…”

Damping research of fiber-reinforced resin mineral composite-based micromechanical modeling

“…According to the relationship definition between damping ratio and tangent of hysteretic angle, 12 damping loss factor can be defined as:…”

“…According to the relationship definition between damping ratio and tangent of hysteretic angle, 12 damping loss factor can be defined as: where ψ is the energy loss factor and ξ is the damping ratio; ΔW is the dissipated energy and W is the total energy stored; φ is the hysteretic angle.…”

Mechanical Properties

“…Damping materials fall into four categories: (i) materials exhibiting high loss modulus but low loss tangent (such as cast iron, metal-matrix composites [6][7][8], shape-memory alloys [9][10][11][12] and acrylic impregnated ceramics [13]), (ii) materials exhibiting high loss tangent but low loss modulus (such as rubber and other polymers [14,15]), (iii) materials exhibiting low values of both loss tangent and loss modulus (such as quartz particle filled epoxy [16], short carbon fiber filled nylon [17], interpenetrating polymer networks [18], hot-compacted polyethylene/polypropylene [19] and short jute fiber filled polymer blend [20]), Graphite network cement-matrix composite [21] 9.26 0.811 7.502 2.47 Nanoscale Cu-Al-Ni shape-memory alloy [9] 22.06 0.196 4.43 0.93 Tungsten (95%) with In-Sn [9] 161 0.05 8.1 0.63 Acrylic impregnated ceramic [13] 60 0.04 2.4 0.31 Quartz particle filled epoxy [16] 3 0.15 0.45 0.26 Short carbon fiber filled nylon [17] 13 0.05 0.7 0.2 Hot-compacted polyethylene/polypropylene [19] 5.4 0.083 0.45 0.19 Interpenetrating polymer networks [18] 0.13 0.3 0.040 0.11 Short jute fiber filled polymer blend [20] 1 0.1 1 0.1…”