Results 191 to 200 of about 3,802 (230)

Accelerated Hygrothermal and UV Aging of Thermoplastic Polyurethanes

High Performance Polymers, 2008
Thermoplastic polyurethanes (PU) were prepared from 4,4'-diphenyl methane diisocyanate (MDI), polyether polyol and 1,4 butane diol with and without a hindered amine light stabilizer (Tinuvin®-123) and UV absorber (Tinuvin®-400). The accelerated hygrothermal and UV aging were performed at different humidity and aging temperatures for 720, 1440, and ...
R.N. Jana, H. Bhunia
openaire   +1 more source

Hygrothermal ageing of plant oil based marine composites

Composite Structures, 2013
In this paper, the effect of hygrothermal ageing on the flexural properties of glass/epoxy, glass/linseed oil and glass/castor oil composites is reported. Plant oil based resins offer renewable and potentially less toxic alternatives to conventional largely petroleum based marine composites.
Malmstein, M., Chambers, A.R., Blake, J.I.R.   +2 more
openaire   +2 more sources

The Hygrothermal Aging Life Models of Solid Propellant

Advanced Materials Research, 2012
The temperature and humidity are two main environmental factors, which have influence on the life of solid propellant. Comparing with single factor aging life model, hygrothermal aging life model is more feasible, which takes temperature and humidity into consideration. In this paper two hygrothermal aging life models were established.
Jian Wei Lai, Xin Long Chang, Sun Tao, Peng Ya Fang, Wan Lei Liu   +4 more
openaire   +1 more source

Ageing of particulate-filled epoxy resin under hygrothermal conditions

Construction and Building Materials, 2020
Abstract This paper investigated the physical, mechanical, thermo-mechanical and microstructural properties of an epoxy-based resin system containing fire retardant and fly-ash under accelerated hygrothermal ageing. The particulate-filled epoxy resin was conditioned for 1000, 2000 and 3000 h at temperatures up to 60 °C and a relative humidity of 98%.
Mojdeh Mehrinejad Khotbehsara, Allan Manalo, Thiru Aravinthan, Wahid Ferdous, Kate T.Q. Nguyen, Gangarao Hota   +5 more
openaire   +2 more sources

Hygrothermal Aging Effects on Buried Molecular Structures at Epoxy Interfaces

Langmuir, 2013
Interfacial properties such as adhesion are determined by interfacial molecular structures. Adhesive interfaces in microelectronic packages that include organic polymers such as epoxy are susceptible to delamination during accelerated stress testing.
John N, Myers, Chi, Zhang, Kang-Wook, Lee, Jaimal, Williamson, Zhan, Chen   +4 more
openaire   +2 more sources

Cyclic hygrothermal aging of aircraft lightning protections: phenomenological overview

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference<BR>20th AIAA/ASME/AHS Adaptive Structures Conference<BR>14th AIAA, 2012
The recent transition to full composite fuselages is a major breakthrough in aeronautical design. To ensure satisfactory lightning protection, the electrical properties of the primary composite structure need to be improved and a design solution lies on bonding a metallic shnet to the fuselage. An important issue is the prediction of the aging behavior
Gilles Lubineau, Jalal Yagoubi, Shahid Saghir, Lakshmi Selvakumaran, Abe Askari   +4 more
openaire   +1 more source

Development of hygrothermal accelerated ageing cycles

2019
The lack of durability assessment procedures directly applicable to thermal mortars motivated the development of durability assessment procedures. The combination of the analysis of existing procedures with hygrothermal simulation allowed the development of accelerated ageing hygrothermal cycles, applied to thermal rendering systems, taking into ...
Joana Maia, Nuno Ramos, R. Veiga
openaire   +1 more source

Hygrothermal Ageing of Glass Reinforced Composite Pipes

1999
Structural applications of composite materials imply that a given structure is exposed to a complex loading spectrum over a long period of time. This loading spectrum can be both of a mechanical nature (dynamic, static or their combination) and of a non-mechanical origin associated with external environment such as temperature and concentration of ...
openaire   +1 more source

Swelling of DGEBA/DDA epoxy resin during hygrothermal ageing

Polymer, 1998
Abstract Understanding the swelling behaviour of polymers during hygrothermal ageing is potentially important for both composite materials and structural adhesives, since swelling may significantly influence the mechanical behaviour due to the increase of residual stresses at interfaces.
G.Z. Xiao, M.E.R. Shanahan
openaire   +1 more source

Modeling of natural fiber reinforced composites under hygrothermal ageing

Composite Structures, 2018
Abstract In this paper, we focus on the mechanical performance of fibers naturally derived from plants as reinforcement of a composite structure. A nonlinear constitutive model for the whole hygrothermal ageing process of natural fiber reinforced composites is established.
Fang Tian, Zheng Zhong, Yihui Pan
openaire   +1 more source