The time to failure of carbon fiber-reinforced polymer composites is investigated during simultaneous compression and one-sided thermal degradation from a constant heat flux. The purpose of this investigation is to determine the rate of thermal degradation and mechanical property loss from fire exposure by observing the time to failure during simultaneous compression loading. A custom compression test fixture is designed and validated for use under thermomechanical loading. Testing is conducted on CFRP samples of varying thicknesses and quasi-isotropic layups. Test conditions are adjusted for a range of heat fluxes and compressive loads. Test parameters are isolated to observe individual impacts on time to failure. In each case, decreasing exponential trends are observed. High heat fluxes and high compressive loads result in shorter failure times. Temperature profiles are created based on heat flux exposure time and the position through the material thickness in order to determine failure criteria for thermomechanical loading. An empirical model is created to extrapolate and predict failure times using a stretched exponential function, based on mechanical preload, heat flux, and material thickness.
GibsonAGMouritzAP. Fire properties of polymer composite materials, Dordrecht, The Netherlands: Springer, 2006.
2.
GibsonAGWrightPNHWuYSet al.Modelling residual mechanical properties of polymer composites after fire. Plast Rubber Compos2003; 32: 1–9.
3.
WolfrumJWhitneyEEiblS. Approaches to understand and predict the influence of rapid heat-up on degradation and strength of carbon fibre polymer matrix composites. J Compos Mater2016; 51: 1–13.
4.
MouritzAPMathysZ. Post fire mechanical properties of glass-reinforced polyester composites. Compos Sci Technol2001; 61: 475–490.
5.
GibsonAGWrightPNHWuYSet al.The integrity of polymer composites during and after fire. J Compos Mater2003; 38: 1–26.
6.
Seggewiss PGB. Properties of fire-damaged polymer matrix composites. In: Proceedings of the 3rd conference on composites in fire, Newcastle, UK, 9–10 September 2003.
7.
GardinerCPMathysZMouritzAP. Tensile and compressive properties of FRP composites with localised fire damage. Appl Compos Mater2002; 9: 353–367.
8.
LattimerBYOuelletteJTrellesJ. Thermal response of composite materials to elevated temperatures. Fire Technol2009; 47: 823–850.
9.
LattimerBYOuelletteJ. Properties of composite materials for thermal analysis involving fires. Compos Part A2005; 37: 1068–1081.
10.
TrellesJLattimerBY. Modelling thermal degradation of composite materials. Fire Mater2007; 31: 147–171.
11.
BaiYValleeTKellerT. Modeling of thermal responses for FRP composites under elevated and high temperatures. Compos Sci Technol2008; 68: 47–56.
12.
MilkeJAVizziniAJ. Thermal response of fire exposed composites. J Compos Technol Res1991; 13: 145–151.
13.
ChungKSeferisJCNamJD. Investigation of thermal degradation behavior of polymeric composites: prediction of thermal cycling effect from isothermal data. Compos Part A2000; 31: 945–957.
14.
HancoxNL. Thermal effects on polymer matrix composites: part 1. Thermal cycling. Mater Des1998; 19: 85–91.
15.
WolfrumJEiblSLietchL. Rapid evaluation of long term thermal degradation of carbon fibre epoxy composites. Compos Sci Technol2009; 69: 523–530.
16.
KourtidesDA. Thermal and flammability characterization of graphite composites. J Fire Sci1986; 4: 397–426.
17.
Sorathia U. Flammability and fire safety of composite materials. In: Proceedings of the 1st international workshop on composite materials for offshore opterations, Houston, Texas, 26–28 October 1993, pp.309–317. ▪▪: ▪▪.
18.
Koo JH, Muskopf B, Venumbaka S, et al. Flammability properties of polymer composites for marine applications. In: Proceedings of the 32nd international SAMPE technical conference, Boston, MA, 5–9 November 2000, Paper No. 136.
19.
EiblS. Observing Inhomogeneity of plastic components in carbon fiber reinforced polymer materials by ATR-FTIR spectroscopy in the micrometer scale. J Compos Mater2008; 42: 2131–2146.
20.
FeihSMathysZGibsonAGet al.Modelling the tension and compression strengths of polymer laminates in fire. Compos Sci Technol2005; 67: 551–564.
21.
FeihSMathysZGibsonAGet al.Modelling the compression strength of polymer laminates in fire. Compos Part A2007; 38: 2354–2365.
22.
BaiYKellerT. Modeling of mechanical response of FRP composites in fire. Compos Part A2009; 40: 731–738.
23.
BaiYKellerT. Modeling of strength degradation for fiber-reinforced polymer composites in fire. J Compos Mater2009; 43: 2371–2385.
24.
BaiYKellerT. Time dependence of material properties of FRP composites in fire. J Compos Mater2009; 43: 2469–2484.
25.
GibsonAGBrowneTNAFeihSet al.Modeling composite high temperature behavior and fire response under load. J Compos Mater2012; 46: 2005–2022.
26.
AsaroRJLattimerBRamrothW. Structural response of FRP composites during fire. Compos Struct2009; 87: 382–393.
27.
Bausano J, Boyd S, Lesko J, et al. Composite life under sustained compression and one-sided simulated fire exposure: characterization and prediction. In: Proceedings of composites in fire-3, 9–10th September 2003, University of Newcastle-upon-Tyne, UK.
28.
LiuLHolmesJWKordomateasGAet al.Compressive response of composites under combined fire and compression loading. In: CouchmanLMouritzAP (eds). Modeling of naval composite structures in fire, Melbourne: Acclaim Printing, 2006, pp. 109–142.
29.
LooyehMRESamantaAJihanSet al.Modelling of reinforced polymer composites subject to thermo-mechanical loading. Int J Numer Meth Eng2005; 63: 898–925.
30.
KimJLeeSWKwonS. Time-to-failure of compressively loaded composite structures exposed to fire. J Compos Mater2007; 41: 2715–2721.
31.
Ziqing Y and Zhou A. An integrated thermomechanical method for modeling fiber reinforced polymer composite structures in fire. In: ASCE structures congress, Orlando, Florida, 2010.
32.
HendersonJBWiebeltJATantMR. A Model for the thermal response of polymer composite materials with experimental verification. J Compos Mater1985; 19: 579–595.
33.
GibsonAGWuYSChandlerHWet al.A model for the thermal performance of thick composite laminates in hydrocarbon fires. Revue de L’Institut Francais du Petrole1995; 50: 69–74.
34.
KellerTBaiY. Structural performance of FRP composites in fire. Adv Struct Eng2010; 13: 793–804.
35.
MouritzAPFeihSKandareEet al.Review of fire structural modelling of polymer composites. Compos Part A2009; 40: 1800–1814.
36.
DaviesJMWangYCWongPMH. Polymer composites in fire. Compos Part A2006; 37: 1131–1141.
37.
KeyCTLuaJ. Constituent based analysis of composite materials subjected to fire conditions. Compos Part A2006; 37: 1005–1014.
38.
SchartelBHullTR. Development of fire retarded materials-interpretation of cone calorimeter data. Fire Mater2007; 31: 327–354.
ISO 14126. Fibre-reinforced plastic composites – Determination of compressive properties in the in-plane direction. International Organization for Standards, Chemin de Blandonnet 8, 1214 Vernier, Geneva, Switzerland, www.iso.org, 1999.
42.
ASTM Standard D6641, 2016. Standard test method for compressive properties of polymer matrix composite materials using a combined loading compression (CLC) test fixture, West Conshohocken, PA: ASTM International, 2003.
43.
ASTM Standard D3410, 2016. Standard test method for compressive properties of polymer matrix composite materials with unsupported gage section by shear loading, West Conshohocken, PA: ASTM International, 2003.
44.
ASTM Standard D695, 2015. Standard test method for compressive properties of rigid plastics, West Conshohocken, PA: ASTM International, 2003.
45.
Seggewiss P. Experimentelle und numerische Untersuchung des Verhaltens kohlenstofffaserverstärkter Epoxidmatrix-Systeme unter einseitiger thermischer und gleichzeitiger mechanischer Belastung. PhD Thesis, Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik Institut für Werkstoffkunde, 2010.
46.
EiblS. Potential for the formation of respirable fibers in carbon fiber reinforced plastic materials after combustion. Fire Mater2017; 41: 1–9.
47.
MahieuxCAReifsniderKL. Property modeling across transition temperatures in polymers: a robust stiffness-temperature model. Polymer2001; 42: 3281–3291.
