Abstract
The quest for light weight high stiffness structures that have excellent durability and corrosion resistance has led to the increasing use of composite materials in aircraft structures. Rigorous static and fatigue test programs are required to fully understand material behaviour, damage growth and fatigue characteristics of the composite structures to certify and prolong the usage of aircraft. Fatigue testing is a time consuming and costly process. Methods are in place to accelerate fatigue tests for metallic materials which in some cases have been translated across to the composites field. This paper reviews these methodologies and discusses their applicability and suitability for testing composite materials with the aim of improving composite fatigue test run times. Three approaches currently exist to simplify flight spectra, namely truncating portions of load cycles, applying load enhancement factors and merging cycles by using a turning point reduction technique. From the literature review it is clear that significant further work is required in developing turning point reduction techniques for composite structural fatigue testing applications. Based on the information gathered thus far, work in this area is currently underway covering aspects of theoretical modelling and fatigue test validation, starting from relatively simple load cases, such as specimens with a single delamination crack, right through to specimens subjected to impact damage under compressive fatigue loading.
| Original language | English |
|---|---|
| Title of host publication | 9th Australasian Congress on Applied Mechanics, ACAM 2017 |
| Publisher | National Committee on Applied Mechanics |
| Volume | 2017-November |
| ISBN (Electronic) | 9781925627022 |
| Publication status | Published - 2017 |
| Event | Australasian Congress on Applied Mechanics 2017 - University of New South Wales, Sydney, Australia Duration: 27 Nov 2017 → 29 Nov 2017 Conference number: 9th https://acam9.com.au/ |
Conference
| Conference | Australasian Congress on Applied Mechanics 2017 |
|---|---|
| Abbreviated title | ACAM 2017 |
| Country | Australia |
| City | Sydney |
| Period | 27/11/17 → 29/11/17 |
| Internet address |
Keywords
- Certification
- Fatigue
- Spectra Simplification
- Testing
- Turning Point Reduction Technique
Cite this
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Fatigue spectra simplification approaches for accelerated testing in composite aircraft structures. / Chowdhury, N. M.; Wang, J.; Chiu, W. K.
9th Australasian Congress on Applied Mechanics, ACAM 2017. Vol. 2017-November National Committee on Applied Mechanics, 2017.Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other
TY - GEN
T1 - Fatigue spectra simplification approaches for accelerated testing in composite aircraft structures
AU - Chowdhury, N. M.
AU - Wang, J.
AU - Chiu, W. K.
PY - 2017
Y1 - 2017
N2 - The quest for light weight high stiffness structures that have excellent durability and corrosion resistance has led to the increasing use of composite materials in aircraft structures. Rigorous static and fatigue test programs are required to fully understand material behaviour, damage growth and fatigue characteristics of the composite structures to certify and prolong the usage of aircraft. Fatigue testing is a time consuming and costly process. Methods are in place to accelerate fatigue tests for metallic materials which in some cases have been translated across to the composites field. This paper reviews these methodologies and discusses their applicability and suitability for testing composite materials with the aim of improving composite fatigue test run times. Three approaches currently exist to simplify flight spectra, namely truncating portions of load cycles, applying load enhancement factors and merging cycles by using a turning point reduction technique. From the literature review it is clear that significant further work is required in developing turning point reduction techniques for composite structural fatigue testing applications. Based on the information gathered thus far, work in this area is currently underway covering aspects of theoretical modelling and fatigue test validation, starting from relatively simple load cases, such as specimens with a single delamination crack, right through to specimens subjected to impact damage under compressive fatigue loading.
AB - The quest for light weight high stiffness structures that have excellent durability and corrosion resistance has led to the increasing use of composite materials in aircraft structures. Rigorous static and fatigue test programs are required to fully understand material behaviour, damage growth and fatigue characteristics of the composite structures to certify and prolong the usage of aircraft. Fatigue testing is a time consuming and costly process. Methods are in place to accelerate fatigue tests for metallic materials which in some cases have been translated across to the composites field. This paper reviews these methodologies and discusses their applicability and suitability for testing composite materials with the aim of improving composite fatigue test run times. Three approaches currently exist to simplify flight spectra, namely truncating portions of load cycles, applying load enhancement factors and merging cycles by using a turning point reduction technique. From the literature review it is clear that significant further work is required in developing turning point reduction techniques for composite structural fatigue testing applications. Based on the information gathered thus far, work in this area is currently underway covering aspects of theoretical modelling and fatigue test validation, starting from relatively simple load cases, such as specimens with a single delamination crack, right through to specimens subjected to impact damage under compressive fatigue loading.
KW - Certification
KW - Fatigue
KW - Spectra Simplification
KW - Testing
KW - Turning Point Reduction Technique
UR - http://www.scopus.com/inward/record.url?scp=85051509079&partnerID=8YFLogxK
M3 - Conference Paper
VL - 2017-November
BT - 9th Australasian Congress on Applied Mechanics, ACAM 2017
PB - National Committee on Applied Mechanics
ER -