High strain rate in-plane shear behavior of composites

• Published in: Polymer testing Vol. 32; no. 8; pp. 1334 - 1341
• Main Authors: Gowtham, H.L., Pothnis, Jayaram R., Ravikumar, G., Naik, N.K.
• Format: Journal Article
• Language: English
• Published: Kindlington Elsevier Ltd 01-12-2013; Elsevier
• Subjects: Applied sciences; Compression; Compression tests; Exact sciences and technology; Forms of application and semi-finished materials; Glass fiber reinforced plastics; High strain rate; In-plane shear properties; Laminates; Off-axis testing; Polymer industry, paints, wood; Shear properties; Shear strain; Shear strength; Split Hopkinson pressure bar; Strain rate; Technology of polymers; Tensile tests; Tension; Compression; In-plane shear properties; Tension; Split Hopkinson pressure bar; Off-axis testing; High strain rate; Strain rate sensitivity; High strain; Laminate; Stress strain relation; Epoxy resin; Mechanical properties; Shear strength; Tensile property; Experimental study; Mineral fiber; Composite material; Deformation measurement; Hopkinson bar; Glass fiber fabric; Woven material
• ISSN: 0142-9418; 1873-2348
• DOI: 10.1016/j.polymertesting.2013.08.008

Studies are presented on in-plane shear properties of a typical plain weave E-glass/epoxy composite under high strain rate loading. In-plane shear properties were determined with ±45 degree off-axis compression and tension tests using a split Hopkinson pressure bar apparatus. In-plane shear properties are presented as a function of axial and shear strain rates. The range of axial strain rates for off-axis compression tests was 819–2003 per sec, and for off-axis tension tests was 91–180 per sec, whereas the range of shear strain rates for off-axis compression tests was 1388–3442 per sec and for off-axis tension tests was 153–303 per sec. In general, it was observed that in-plane shear strength was enhanced at high strain rate loading compared to that at quasi-static loading. Also, it was observed that in-plane shear strength increased with increasing strain rate within the range of strain rates considered.