Power generation from wind farms is growing rapidly around the world. In past decade, energy has played an important role in contributing to sustainable development. However, turbines are extremely susceptible component damage under complex environments and over long-term operational cycles, which directly affects their maintenance, reliability, operating costs. It crucial realize efficient early warning of turbine failure avoid equipment breakdown, prolong service life turbines, maximize...

The temperature and humidity were found to be the most effective parameters in behavior of polyurethane flexible adhesive bonded aluminum joints. In order obtain effect environment on bond strength, toughness, failure displacement, joints stiffness model, this work, single-lap tested under various temperatures (25, 40, 60 80 °C) relative (RH, 55, 65, 75, 85, 95 99%) using an environmental chamber. results showed that as increased from 55 99%, strength decreased linear function. As 25 °C,...

Fiber-reinforced polymers (FRPs) have great potential in shipbuilding. As a new type of material, basalt-fiber-reinforced polymer (BFRP) has received increasing attention due to its good economic and environmental performance. In this paper, BFRP single-lap joints (SLJs) bonded by Araldite®2011 Araldite®2014 were selected as sample objects, the joints, aged for 240 h, 480 720 experimentally analyzed 3.5% NaCl solution/5% solution at 80 °C. The sequential dual Fickian (SDF) model was used fit...

This paper focuses on the effect of cyclic hygrothermal aging mechanical behavior adhesive bonded aluminum joints. The joint specimens were immerged in temperature/relative humidity set at 80 °C/95% and −40 °C/30% for cycle experiments un–aged, 20, 40, 60 cycles, respectively. Joint bonding angles to 0°, 15°, 30°, 45°, 60°, 75° 90°. stress modes joints directly related angles. It revealed that significantly decreased ultimate failure strength stiffness with increase cycles. Besides,...

Facing increasingly serious resource crises, energy conservation is becoming the development trend of various delivery vehicles, and lightweight an important way to achieve conservation. In this paper, basalt fiber-reinforced resin composite material (BFRP) was selected study effect its bonding structure, it used make BFRP-BFRP joints. Two adhesives, Araldite®2012 Araldite®2015, were single-lap joints dumbbell-shaped specimens. Aging environments 80 °C/95% RH °C/pure water for 0-day...

A biomass based hydrogel soybean dregs-Poly(acrylic acid) (SD-PAA) was synthesized under UV radiation while using agricultural waste dregs. Maximum absorption of SD-PAA is 3587 g·g−1 in distilled water and 302.0 150 mM NaCl aqueous solution. Moreover, the influence granularity, salt solution, ions solutions on systematically studied. Sensitivity sequence to cations K+ < Na+ NH4+ Al3+ Fe3+ Mg2+ Ca2+, that anions PO43− > SO42− Cl−. experimental results showed retention capability...

ABSTRACTTemperature is a very important factor that must be fully considered in the study on adhesive joint strength. In this paper, silyl-modified polymer-based ISR 70-08 which widely used engineering was studied. Dog-bone specimens were fabricated and tested at −40°C, room temperature (RT), 90°C. Results show decrease main mechanical properties with increasing temperature. Butt joints (BJs), single-lap (SLJs), Scarf (SJs) different temperatures. A quadratic polynomial expression an ideal...

Basalt Fibre Reinforced Polymer (BFRP)-bonded structures are lightweight, high strength, economical, and environmentally friendly, which is very advantageous in the civil sector. The aim of this paper to provide a comprehensive account hygrothermal degradation failure mechanisms BFRP-bonded by comparing residual properties two epoxy adhesive BFRP single-lap joints after ageing for 240 h, 480 720 h an extreme environment with pure water at 80 °C. hydrophilicity thermal stability adhesives...

In this paper, the influence of temperature on bonding strength aluminum alloy joints under full field is studied. Based service range vehicle structures, failure at different points, namely −40 °C, −20 0 25 °C (RT), 40 60 and 80 tested. The results showed that compared with adhesive it decreased by 47.69% 68.15% RT 80°C, respectively; Young’s modulus 57.63% 75.42% increase temperature, young’s modulus, tensile strain decreased. addition, varied temperature. To be specific, stiffness...

Fiber-reinforced polymer (FRP) materials are increasingly used in automotive industrial fields to achieve lightweight. In order study the influence of high temperature and humidity on bonding structure between different materials, this paper selects basalt fiber-reinforced resin composite (BFRP) aluminum alloy (Al), uses Araldite® 2012 2014, two adhesives, make single lap joints (SLJs). The aging test was carried out for 0 (unaged), 10, 20, 30 days under environment 80 °C/95% relative (RH)...

Due to the low price and good comprehensive properties, FRP composite material has become a new type of civil application in recent years. In this paper, Araldite® 2012 adhesive was used bond basalt-fiber-reinforced polymer (BFRP), durability its bonded joints investigated. Experiments were carried out at 80 °C/DI water (deionized water), °C/3.5% NaCl solution (3.5% SS), °C/5.0% (5.0% SS) 0- (unaged), 10-, 20-, 30-day aging. The specimen BFRP environment water, SS, SS found salt under...

In order to study the mechanical properties of basalt fiber reinforced resin polymers–aluminum alloy (BFRP-Al) single lap joints (SLJ) under different humid and hot conditions. 80 °C/deionized water (DI-water), °C/3.5%NaCl solution °C/5%NaCl were used as aging conditions BFRP-Al joints. Through hygroscopic experiment, maximum absorption rate dumbbell-shaped adhesive in three environments was 7.15%, 4.12% 4.96%, respectively. The polymers (BFRP) 2.24%, 1.2% 1.55%, It is concluded that salt...

Aluminum alloys are widely used in lightweight automotive structures due to their excellent properties. To deeply explore the development of surface bonding technology, aluminum alloy is selected as object, and current research status treatment methods reviewed. The adhesion mechanism during joint preparation, method adhesive selection, process summarized. This overview discusses impact different processes on joints from two perspectives: substrate characteristics failure modes. It examines...

Abstract In order to optimize the reinforcing effect of nano‐SiO 2 on interface fiber metal laminates (FMLs), was treated by ultraviolet irradiation and silane coupling agent for different surface properties. The interaction mechanisms were studied mechanical test, chemical analysis, morphology observation, molecular dynamics (MD) simulation. results showed that average failure strength FMLs with untreated, hydrophilic lipophilic increases 31.80%, 48.77%, 51.38% compared without SiO ,...

The bonding properties of BFRP composites have been demonstrated in previous studies, satisfying the strength and durability criteria. In this paper, a further in-depth study is carried out to bond Basalt Fibre Reinforced Polymer (BFRP) Aluminum Alloy 5052 using two agents, Aralite® 2012 2015, respectively. salt sprays under 80 °C, 3.5% NaCl environment; 5% pure water environment are also considered for comparison. Experimental results show that joints created with Araldite® adhesives higher...

3. 华北水利水电大学机械学院 郑州 450045)

Fiber-reinforced composites are widely used in industrial development due to their excellent performance, and the study of basalt fiber-reinforced resin (BFRP) as a new type economical environmentally friendly material is highly valued, since harsh environments can affect durability bonded joints. In this paper, Araldite® 2015 adhesive for BFRP–BFRP single lap joints (SLJs) was selected subject were analyzed aging experiments three environments: deionized water (DW), 3.5% NaCl solution, 5%...