The aim of this work is the experimental evaluation of the residual strength of composite laminates under compression after low velocity impact. Different kinds of delaminations, partial, embedded and through-the-width, were studied. Carbon-fibre reinforced epoxy composite was used and the experimental tests were performed on [0](16), [0, 90, 0, 90](2S) and [0(i), 90(i)](s) with i=2, 3, 4, 5, using a drop-weight-testing machine. The impacted plates were inspected by the ultrasonic C-Scan to evaluate the size and the shape of the delamination. Results show that the presence of delamination decreases the compressive strength. The stacking sequence and laminate thickness were verified to have a remarkable influence on the value of the residual compressive strength, and play an important role on the observed buckling failure modes.
机构:
Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China
City Univ Hong Kong, Dept Architecture & Civil Engn, Kowloon, Hong Kong, Peoples R ChinaNanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China
Lei, Z. X.
Zhang, L. W.
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Shanghai Ocean Univ, Coll Informat Sci & Technol, Shanghai 201306, Peoples R ChinaNanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China
Zhang, L. W.
Liew, K. M.
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City Univ Hong Kong, Dept Architecture & Civil Engn, Kowloon, Hong Kong, Peoples R China
City Univ Hong Kong, Shenzhen Res Inst Bldg, Shenzhen Hitech Ind Pk, Shenzhen, Peoples R ChinaNanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China