ESEM investigations for assessment of damage kinetics of short glass fibre reinforced thermoplastics – Results of in situ tensile tests coupled with acoustic emission analysis
Source abstract
Abstract
Abstract The damage mechanisms of short glass fibre reinforced polypropylene (PP) and polybutene-1 (PB-1) materials were investigated. For this purpose, in situ tensile tests were conducted in the environmental scanning electron microscope (ESEM) while simultaneously recording the acoustic emission (AE). To be able to observe damage mechanisms directly during loading, notched specimens were used. This method allows the direct correlation of the recorded load – elongation data with observed damage mechanisms, as well as correlations with acoustic emission data. Hence, it is possible to describe the damage kinetics of short glass fibre composite. It was found that different bonding conditions of the two investigated materials result in different damage mechanisms as well as in different AE behaviour. For fibre reinforced PP with excellent bonding conditions of the fibres in the polymeric matrix, fibre fracture, slipping of fibres in the delamination area, debonding and pull-out with matrix yielding was observed. The determined AE parameter amplitude A p and energy E AE for the PB-1 material are lower because of the weak bonding of the fibres to the PB-1-matrix. Hence, energy dissipative damage mechanisms like pull-out with matrix yielding can occur only in a limited part of such materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Ultrasonics and Acoustic Wave Propagation · Smart Materials for Construction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Hybrid methods of polymer diagnostics
2. 2001
3. Bierögel C, Fahnert T, Grellmann W. Deformation behaviour of reinforced polyamide materials evaluated by laser extensometry and acoustic emission analysis. In: Proceedings on strain measurements in the 21st Century, Lancaster (UK). 5–6 September, 2001. p. 56–9.
4. Acoustic emission characteristics of micro-failure processes in polymer blends and composites10.1016/S0266-3538(00)00060-9 ↗
5. Non-destructive polymer testing
6. Bierögel C, Grellmann W. Thermal and acoustic emission during the deformation of glass fibre reinforcement plastics. In: Proceedings on 10th Congress on Material Testing, Budapest (Hungary). 7–11 October, 1991. p. 379–84.
7. Bierögel C, Grellmann W. Evaluation of thermal and acoustic emission of composites by means of local strain measurements. In: Proceedings on ECF 9, European conference on fracture, Varna (Bulgarien). 21–25 September, 1992. p. 242–7.
8. Crack tip deformations of PP-materials
9. In situ crack growth observation and fracture behavior of short carbon fiber reinforced geopolymer matrix composites10.1016/j.msea.2009.12.004 ↗
10. The fracture behaviour of polymers–in situ investigations in the ESEM
11. Friedrich K (Ed.). Application of fracture mechanics to composite materials. Pipes RB (Series editor.), vol. 6. Composite materials series. Amsterdam: Elsevier Science Publishers B.V.; 1989.
12. Friedrich K. Fracture mechanical behavior of short fiber reinforced thermoplastics. Fortschr-Berichte der VDI-Reihe 18: Mechanik/Bruchmechanik Nr. 18, VDI-Verlag Düsseldorf; 1984.
13. Fractographic analysis of polymer composites
14. Michler · 1992
15. Michler · 2008
16. Schallemissionsuntersuchungen an polymeren Verbundwerkstoffen – Teil II: Experimentelle Ergebnisse10.1002/mawe.19800110307 ↗
17. Lauke B, Schultrich B, Pompe W. Theoretical considerations of toughness of short-fibre reinforced thermoplastics. Akademie der Wissenschaften der DDR – Zentralinstitut für Festkörperphysik und Werkstoffforschung: Dresden, DDR; 1988.
18. Theoretical considerations of toughness of short-fiber-reinforced thermoplastics10.1080/03602559008050638 ↗
19. Schallemissionsuntersuchungen an polymeren Verbundwerkstoffen–Teil I: Das Schallemissionsmeßverfahren als quasi-zerstörungsfreie Werkstoffprüfung10.1002/mawe.19800110204 ↗
20. 2008
21. Identification of failure modes in glass/polypropylene composites by means of the primary frequency content of the acoustic emission event10.1016/j.compscitech.2004.01.008 ↗
22. On the use of acoustic emission to investigate damage mechanisms in glass–fibre-reinforced polypropylene10.1016/0266-3538(94)90171-6 ↗
23. Damage analysis and the fibre-matrix effect in polypropylene reinforced by short glass fibres above glass transition temperature10.1016/S0263-8223(02)00294-5 ↗
24. Investigation of the debonding process in wood fiber reinforced polymer composites by acoustic emission10.4028/www.scientific.net/MSF.537-538.199 ↗
25. Tensile tests of polymers at low temperatures in the environmental scanning electron microscope: an improved cooling platform10.1002/sca.20075 ↗
26. Investigation of the peel behavior of polyethylene/polybutene-1 peel films using in situ peel tests with environmental scanning electron microscopy10.1016/j.polymer.2008.10.004 ↗
27. Schoßig M, Zankel A, Bierögel C, Pölt P, Grellmann W. ESEM investigations for assessment of damage kinetics of short glass fibre reinforced thermoplastics – correlations between frequency ranges and damage mechanisms with the help of wavelet transform. Compos Sci Technol, in preparation.
28. ISO 527-2, Plastics – determination of tensile properties – Part 2: Test conditions for moulding and extrusion plastics; 1993-06.
29. Analysis of calorimetric curves detected during the polymorphic transformation of isotactic Polybutene-110.1023/A:1012499918018 ↗
30. Testing of plastics – Instrumented Charpy impact test (ICIT) – procedure for determining the crack resistance behaviour using the instrumented impact test. MPK–ICIT: 2007-01 Part I and Part II. .
31. Characterization of the fracture behavior of glass–fiber reinforced thermoplastics based on PP, PE-HD and PB-110.1002/app.31271 ↗
32. Mechanical behavior of glass–fiber reinforced thermoplastic materials under high strain rates10.1016/j.polymertesting.2008.07.006 ↗
33. EN 1330-9, Non-destructive testing – terminology – Part 9: terms used in acoustic emission testing. Trilingual version; 2000-03. Vieweg+Teubner Verlag | Springer Fachmedien Wiesbaden GmbH. ISBN-Nr: 978-3-8348-1483-8.
34. Schoßig M. Bewertung der Schädigungsmechanismen von kurzglasfaserverstärkten Polyolefinen durch simultane Aufzeichnung der Schallemissionen unter quasistatischer und dynamischer Beanspruchung, Martin-Luther-Universität Halle-Wittenberg, Dissertation; 2010.10.1007/978-3-8348-9924-8_3 ↗
35. Fractography and failure mechanisms of unfilled and particulate filled epoxy resins