PMID- 29534003
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201001
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 11
IP  - 3
DP  - 2018 Mar 13
TI  - Energy Absorption Capacity in Natural Fiber Reinforcement Composites Structures.
LID - 10.3390/ma11030418 [doi]
LID - 418
AB  - The study of natural fiber reinforcement composite structures has focused the 
      attention of the automobile industry due to the new regulation in relation to the 
      recyclability and the reusability of the materials preserving and/or improving 
      the mechanical characteristics. The influence of different parameters on the 
      material behavior of natural fiber reinforced plastic structures has been 
      investigated, showing the potential for transport application in energy absorbing 
      structures. Two different woven fabrics (twill and hopsack) made of flax fibers 
      as well as a non-woven mat made of a mixture of hemp and kenaf fibers were 
      employed as reinforcing materials. These reinforcing textiles were impregnated 
      with both HD-PE (high-density polyethylen) and PLA (polylactic acid) matrix, 
      using a continuous compression molding press. The impregnated semi-finished 
      laminates (so-called organic sheets) were thermoformed in a second step to 
      half-tubes that were assembled through vibration-welding process to cylindric 
      crash absorbers. The specimens were loaded by compression to determine the 
      specific energy absorption capacity. Quasi-static test results were compared to 
      dynamic test data obtained on a catapult arrangement. The differences on the 
      specific energies absorption (SEA) as a function of different parameters, such as 
      the wall thickness, the weave material type, the reinforced textiles, and the 
      matrix used, depending on the velocity rate application were quantified. In the 
      case of quasi-static analysis it is observed a 20% increment in the SEA value 
      when wove Hopsack fabric reinforcement is employed. No velocity rate influence 
      from the material was observed on the SEA evaluation at higher speeds used to 
      perform the experiments. The influence of the weave configuration (Hopsack) seems 
      to be more stable against buckling effects at low loading rates with 10% higher 
      SEA values. An increase of SEA level of up to 72% for PLA matrix was observed 
      when compared with HD-PE matrix.
FAU - Lopez-Alba, Elias
AU  - Lopez-Alba E
AD  - Departamento de Ingenieria Mecanica y Minera, Campus las Lagunillas, Universidad 
      de Jaen, 23071 Jaen, Spain. elalba@ujaen.es.
FAU - Schmeer, Sebastian
AU  - Schmeer S
AUID- ORCID: 0000-0002-3823-2179
AD  - Institute for Composite Materials (IVW), Kaiserslautern University of Technology, 
      67663 Kaiserslautern, Germany. sebastian.schmeer@ivw.uni-kl.de.
FAU - Diaz, Francisco
AU  - Diaz F
AD  - Departamento de Ingenieria Mecanica y Minera, Campus las Lagunillas, Universidad 
      de Jaen, 23071 Jaen, Spain. fdiaz@ujaen.es.
LA  - eng
PT  - Journal Article
DEP - 20180313
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC5872997
OTO - NOTNLM
OT  - crash absorption
OT  - impact behavior
OT  - natural fiber
OT  - specific energy absorption
OT  - structural material
COIS- The authors declare no conflict of interest.
EDAT- 2018/03/14 06:00
MHDA- 2018/03/14 06:01
PMCR- 2018/03/13
CRDT- 2018/03/14 06:00
PHST- 2018/01/30 00:00 [received]
PHST- 2018/02/26 00:00 [revised]
PHST- 2018/03/08 00:00 [accepted]
PHST- 2018/03/14 06:00 [entrez]
PHST- 2018/03/14 06:00 [pubmed]
PHST- 2018/03/14 06:01 [medline]
PHST- 2018/03/13 00:00 [pmc-release]
AID - ma11030418 [pii]
AID - materials-11-00418 [pii]
AID - 10.3390/ma11030418 [doi]
PST - epublish
SO  - Materials (Basel). 2018 Mar 13;11(3):418. doi: 10.3390/ma11030418.