Impact response and post‐impact performance of unidirectional and crossply carbon/epoxy laminates modified with milled glass fibers

2018 ◽  
Vol 40 (6) ◽  
pp. 2441-2451 ◽  
Author(s):  
Saravanakumar Kannivel ◽  
Kailashbalan Periasamy ◽  
Arumugam Vellayaraj
Keyword(s):  
Glass Fibers ◽  
Impact Response ◽  
Impact Performance ◽  
Post Impact

scholarly journals EFFECT OF THE STACKING SEQUENCE ON THE IMPACT RESPONSE OF CARBON-GLASS/EPOXY HYBRID COMPOSITES

2020 ◽  
Vol 18 (1) ◽  
pp. 069
Author(s):  
Hafiz Tauqeer Ali ◽  
Roya Akrami ◽  
Sakineh Fotouhi ◽  
Farzad Pashmforoush ◽  
Cristiano Fragassa ◽  
...  
Keyword(s):  
Hybrid Composites ◽  
Glass Fibers ◽  
Maximum Load ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Stacking Sequence ◽  
Low Velocity ◽  
Impact Performance ◽  
Hybrid Laminates ◽  
The Impact

This paper investigates low-velocity impact response of Quasi Isotropic (QI) hybrid carbon/glass fiber reinforced polymer composites with alternate stacking sequences. Cross-ply woven carbon and glass fibers were used as reinforcing materials to fabricate sandwiched and interlayer hybrid composites. For comparison, the laminates containing only-carbon and only-glass fibers were also studied. Drop weight test was used to impact the samples. The images captured by a normal camera demonstrated that localized damages (delamination) existed within plies. The hybrid laminates had smaller load drops, smaller maximum deflection, and higher maximum load compared to the single fiber laminates. In addition, carbon outside interlayer hybrid laminate showed the highest maximum load and energy absorption, showing the significant dependence of the impact performance on hybridization and stacking sequence. It was concluded that a hybrid composite would help improve impact performance of laminated composites compared to non-hybrid composites if they are properly designed.

Impact Response of Circular Tube with Concentric Plunger

2013 ◽  
Vol 275-277 ◽  
pp. 792-798
Author(s):  
Amir Radzi Ab Ghani ◽  
Hafizi Lukman ◽  
Hafizan Hashim
Keyword(s):  
Energy Absorption ◽  
Circular Tube ◽  
High Energy ◽  
Absorption Capacity ◽  
Peak Force ◽  
Impact Response ◽  
Impact Performance ◽  
High Energy Absorption ◽  
The Impact ◽  
Initial Peak

Thin-walled tubes are generally used as impact energy absorber in various application due to their ease of fabrication and installation, high energy absorption capacity and long stroke. However, the main drawback of plain tube is the high initial peak force. A concentric plunger in the form of tapered block is proposed to overcome this shortcoming while at the same time, improving the impact performance. Static and dynamic axial crushing were performed to determine the initial peak force (IPF), crush force efficiency (CFE) and specific energy absorption (SEA) for the concentric plunger with various taper angles. It was found that the concentric plunger affected the tube impact response. Comparison with plain circular tube was carried out and it was found that the concentric plunger improved the impact response of the tube especially in term of initial peak force.

scholarly journals Foams with Enhanced Ductility and Impact Behavior Based on Polypropylene Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 943 ◽  
Author(s):  
Santiago Muñoz-Pascual ◽  
Cristina Saiz-Arroyo ◽  
Zina Vuluga ◽  
Mihai Cosmin Corobea ◽  
Miguel Angel Rodriguez-Perez
Keyword(s):  
Elastic Modulus ◽  
Cellular Structure ◽  
Glass Fibers ◽  
Halloysite Nanotubes ◽  
Impact Behavior ◽  
Impact Performance ◽  
Polypropylene Composites ◽  
Branched Polypropylene ◽  
Long Chain ◽  
Long Chain Branched Polypropylene

In this work, formulations based on composites of a linear polypropylene (L-PP), a long-chain branched polypropylene (LCB-PP), a polypropylene–graft–maleic anhydride (PP-MA), a styrene-ethylene-butylene-styrene copolymer (SEBS), glass fibers (GF), and halloysite nanotubes (HNT-QM) have been foamed by using the improved compression molding route (ICM), obtaining relative densities of about 0.62. The combination of the inclusion of elastomer and rigid phases with the use of the LCB-PP led to foams with a better cellular structure, an improved ductility, and considerable values of the elastic modulus. Consequently, the produced foams presented simultaneously an excellent impact performance and a high stiffness with respect to their corresponding solid counterparts.

scholarly journals Impact and Post-Impact Performance of Sandwich Wall Boards with GFRP Face Sheets and a Web-Foam Core: The Effects of Impact Location

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1714 ◽  
Author(s):  
Yiwei Xia ◽  
Xiaoping Li ◽  
Yu Peng ◽  
Mianheng Lai ◽  
Lu Wang
Keyword(s):  
Mechanical Performance ◽  
Loading Capacity ◽  
Foam Core ◽  
Impact Performance ◽  
Impact Location ◽  
Post Impact ◽  
Sandwich Wall ◽  
Ultimate Loading Capacity ◽  
The Impact ◽  
Ultimate Loading

In recent years, load-bearing exterior sandwich wall boards have been adopted in civil engineering. The exterior walls of structures are often exposed to low velocity impacts such as stones, tools, and windborne debris, etc. The ultimate loading capacity, deformation, and ductility of sandwich walls are weakened by impact loads. In this study, the sandwich wall boards consisted of glass fiber reinforced plastic (GFRP) face sheets and a web-foam core. The core of wall boards was not the isotropic material. There was no doubt that the mechanical performance was seriously influenced by the impact locations. Therefore, it is necessary to carry out an investigation on the impact and post-impact performance of exterior wall boards. A comprehensive testing program was conducted to evaluate the effects of impact locations and impact energies on the maximum contact load, deflection, and contact time. Meanwhile, the compression after impact (CAI) performance of wall boards were also studied. The results indicated that the impact location significantly affects the performance of wall boards. Compared with an un-damaged wall board, the residual ultimate loading capacity of damaged wall boards reduced seriously, which were not larger than 50% of the designed ultimate loading capacity.

scholarly journals Mechanical and Impact Damage Analysis on Carbon/Natural Fibers Hybrid Composites: A Review

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 517 ◽  
Author(s):  
Carlo Santulli
Keyword(s):  
Composite Laminates ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Impact Damage ◽  
Natural Fibers ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Impact Performance ◽  
Modes Of Failure ◽  
Post Impact

Hybrid composite laminates including carbon fibers and natural fibers, hence basalt and/or vegetable ones, draw on the experiences accumulated in studying the hybridization of fiberglass with carbon or natural fibers. Yet, in the case of carbon/natural fiber composites, the sense is different: in particular, the idea is to accept the reduction of properties from bare carbon fiber composites and the unavoidable complication in processing, induced by hybridization. The compensation obtained, which offers a rationale to this operation, is the improved toughness and a significant modification of the different modes of failure. This would bring a higher energy absorption and a substantially more effective damage tolerance. The aforementioned characteristics are particularly of interest in the case of flexural properties, impact properties, and residual post-impact performance.

scholarly journals Impact and post-impact response of lightweight CFRP/wood sandwich composites

2022 ◽  
Vol 279 ◽  
pp. 114766
Author(s):  
Muhammad Basha ◽  
A. Wagih ◽  
A. Melaibari ◽  
G. Lubineau ◽  
A.M. Abdraboh ◽  
...  
Keyword(s):  
Impact Response ◽  
Sandwich Composites ◽  
Post Impact

scholarly journals Residual Impact Performance of ECC Subjected to Sub-High Temperatures

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 454
Author(s):  
Raad A. Al-Ameri ◽  
Sallal Rashid Abid ◽  
Gunasekaran Murali ◽  
Sajjad H. Ali ◽  
Mustafa Özakça ◽  
...  
Keyword(s):  
High Temperatures ◽  
Reference Group ◽  
Impact Resistance ◽  
Impact Response ◽  
Repeated Impact ◽  
Impact Performance ◽  
Compressive And Flexural Strengths ◽  
Reference Specimens ◽  
Temperature Exposure ◽  
The Impact

Despite the fact that the mechanical properties of Engineered Cementitious Composites (ECC) after high-temperature exposure are well investigated in the literature, the repeated impact response of ECC is not yet explored. Aiming to evaluate the residual impact response of ECC subjected to sub-high temperatures under repeated drop weight blows, the ACI 544-2R repeated impact test was utilized in this study. Disk impact specimens (150 mm diameter and 64 mm thickness) were prepared from the M45 ECC mixture but using polypropylene fibers, while similar 100 mm cube specimens and 100 × 100 × 400 mm prism specimens were used to evaluate the compressive and flexural strengths. The specimens were all cast, cured, heated, cooled, and tested under the same conditions and at the same age. The specimens were subjected to three temperatures of 100, 200 and 300 °C, while a group of specimens was tested without heating as a reference group. The test results showed that heating to 100 and 200 °C did not affect the impact resistance noticeably, where the retained cracking and failure impact numbers and ductility were higher or slightly lower than those of unheated specimens. On the other hand, exposure to 300 °C led to a serious deterioration in the impact resistance and ductility. The retained failure impact numbers after exposure to 100, 200, and 300 °C were 313, 257, and 45, respectively, while that of the reference specimens was 259. The results also revealed that the impact resistance at this range of temperature showed a degree of dependency on the compressive strength behavior with temperature.

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