Proračun čvrstoće kompozitne konstrukcije krila uzimajući u obzir ovisnost mehaničkih svojstava o temperaturi

master's thesis

• Title (english): Strength analysis of a composite wing structure considering temperature dependence of mechanical properties
• Author: Sara Kučinić
• Mentor: Darko Ivančević (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-07-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Aviation, Rocket and Space Technology

Abstract

Ovaj rad istražuje ovisnost mehaničkih svojstava polimera ojačanih ugljičnim vlaknima (CFRP) o temperaturi. CFRP je materijal koji se široko koristi u zrakoplovnim primjenama zbog svog izuzetnog omjera čvrstoće i mase. Rad ispituje kako različita mehanička svojstva CFRP-a, poput vlačne čvrstoće, tlačne čvrstoće, smične čvrstoće i modula elastičnosti, degradiraju s porastom temperature, posebno iznad temperature staklišta. Za aproksimaciju ovih promjena koristi se model hiperbolne tangens funkcije, a empirijski podaci potvrđuju točnost modela. Praktične implikacije ovih rezultata demonstriraju se analizom pojednostavljene konstrukcije krila Dassault Rafale koristeći programski paket Abaqus. Numerički proračun pokazuje da temperatura ima značajan utjecaj na krutost i čvrstoću konstrukcije. Rezultati proračuna pružaju vrijedne uvide u ponašanje kompozitne konstrukcije na povećanim temperaturama i operativne parametre kompozitnih materijala u zrakoplovnoj industriji.
Zaključno, istraživanje naglašava potrebu za daljnjim razvojem CFRP materijala s poboljšanom toplinskom stabilnošću i mehaničkim performansama kako bi se osigurala njihova pouzdanost u primjenama na visokim temperaturama.

Abstract (english)

This paper investigates the temperature dependence of the mechanical properties of Carbon
Fiber Reinforced Polymers (CFRP). CFRP is a material widely used in aerospace applications
due to its exceptional strength-to-weight ratio. The paper examines how various mechanical
properties of CFRP, such as tensile strength, compressive strength, shear strength, and modulus
of elasticity, degrade with increasing temperature, particularly above the glass transition
temperature. A hyperbolic tangent function model is used to approximate these changes, and
empirical data confirm the accuracy of the model. The practical implications of these results
are demonstrated through the analysis of a simplified Dassault Rafale wing structure using the
Abaqus software package. The numerical calculations show that temperature significantly
impacts the stiffness and strength of the structure. The results provide valuable insights into the
behaviour of composite structures at elevated temperatures and the operational parameters of
composite materials in the aerospace industry.
In conclusion, the research highlights the need for further development of CFRP materials with
improved thermal stability and mechanical performance to ensure their reliability in high temperature applications.

• Keywords: CFRP; mehanička svojstva; Dassault Rafale; numerički proračun; Abaqus
• Keywords (english): CFRP; mechanical properties; Dassault Rafale; numerical analysis; Abaqus
• Language: croatian
• URN:NBN: urn:nbn:hr:235:141220
• Study programme: Title: Aeronautical Studies; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva (magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-07-11 17:23:06