TY - GEN

T1 - Accelerated approaches for life-time prediction of composites under static loads

AU - Gloggnitzer, S.

AU - Guttmann, P.

AU - Pinter, G.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Composite materials in structural applications with several decades under static loads unfortunately tend to changings in the material performance over the material lifetime. In the current work, novel methods for the determination of long term strength properties of unidirectional glass fiber reinforced thermoset composites with different fiber orientations are investigated and discussed. Classic creep rupture tests with a constant static loading situation are quite simple tests with low requirements to the test equipment, however, need non-economic testing times. Accelerated approaches, especially the stress rate accelerated creep rupture test and the stepped isostress method offer potentials to reduce testing times in an acceptable prediction quality. Although the suitability of each approach could not be confirmed for all investigated laminate structures. Nevertheless, the developed stress rate accelerated creep rupture test can certainly be regarded as a trendsetting testing procedure in the development of time efficient test methods for the prediction of material life time under static loads.

AB - Composite materials in structural applications with several decades under static loads unfortunately tend to changings in the material performance over the material lifetime. In the current work, novel methods for the determination of long term strength properties of unidirectional glass fiber reinforced thermoset composites with different fiber orientations are investigated and discussed. Classic creep rupture tests with a constant static loading situation are quite simple tests with low requirements to the test equipment, however, need non-economic testing times. Accelerated approaches, especially the stress rate accelerated creep rupture test and the stepped isostress method offer potentials to reduce testing times in an acceptable prediction quality. Although the suitability of each approach could not be confirmed for all investigated laminate structures. Nevertheless, the developed stress rate accelerated creep rupture test can certainly be regarded as a trendsetting testing procedure in the development of time efficient test methods for the prediction of material life time under static loads.

KW - Creep rupture

KW - Glass fiber composites

KW - Long term mechanical properties

KW - Thermoset resin

UR - http://www.scopus.com/inward/record.url?scp=85071596193&partnerID=8YFLogxK

M3 - Conference contribution

T3 - ECCM 2018 - 18th European Conference on Composite Materials

BT - ECCM 2018 - 18th European Conference on Composite Materials

T2 - 18th European Conference on Composite Materials, ECCM 2018

Y2 - 24 June 2018 through 28 June 2018

ER -