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With the advantage of high specific strength, excellent design-ability, anti-fatigue performance, good corrosion resistance, special electromagnetic properties, CFRP laminate is widely used in the field of aerospace and aviation [1].
The influence factors of CFRP laminate drilling-induced defects at the hole exit are studied.
On the contrary, the broken-edge factor Ld for grit size 40/45 is much less to the broken-edge factor Ld for grit size 25/30 and no tear occurs at the hole exit for grit size 40/45.
Table 2 shows the effect of feed speed on expanding factor Da.
It is the improving of cutting ability of core drill that ensures the decrease of cutting heat, so the heat affected zones of CFRP laminate become small and the thermal deformation decreases [6], which make the diameter at the hole exit get close to the diameter of brazed diamond core drill.

The Application of Recycled Aggregate Concrete in Road Engineering Wanlin Guo Hunan Communication Polytechnic, Changsha, 410004,China room 302,Unit 1,No.1 building, Xiang Han Royal homes, Forest Road 341,,Changsha, Hunan province,China Key words: Recycled concrete; Road engineering; Application Abstract: Through the introduction of the application situation and basic properties of recycled concrete,the author analyzes its application value and and research direction in engineering application,and then puts forward to the application prospect of recycled concrete in road engineering.
The basic properties of the recycled concrete Concrete mixture ratio and the performance of the recycled aggregates can affect the performance of recycled concrete.
In the same condition, its mechanical properties, deformation properties, durability and workability performance are lower than those of ordinary concrete, which makes the recycled concrete be lower than that of normal concrete in structure. 2.1 Recycled concrete workability The major factors influence the workability and regeneration of recycled concrete’s replacement rate and water-binder ratio.
Second, similar to the natural aggregate concrete, under the same conditions,The higher the water-binder ratio is, the greater the slump is. 2.2 The mechanical properties of recycled concrete The crushing method, the aggregate replacement rate, the original concrete strength grade and recycled concrete mixture ratio of recycled aggregates has a certain degree of influence on the strength of the recycled concrete.
(3) Research in road engineering, after mixing polypropylene fiber with the recycled concrete, polypropylene fiber’s early ,medium and long-term influence on the the properties of recycled concrete the best mixing quantity of polypropylene fiber

These written-in errors stem from the statistical fluctuations of magnetic properties of the islands and the randomness of islands structure.
The BER is caused by two factors - timing error of the write pole position and the error caused by the insufficient write field margin during the writing process.
Chen et al., “Structure, magnetic and thermal properties of FePt-C-BN granular films for heat assisted magnetic recording,” J Phys D Appl Phys, vol. 53, no. 13, 2020, doi: 10.1088/1361-6463/ab680d
Honda, “Mechanical demagnetization at head disk interface of perpendicular recording,” IEEE Trans Magn, vol. 45, no. 2, pp. 893–898, 2009, doi: 10.1109/TMAG.2008.2010670
Das et al., “Thickness Dependent Surface Topography, Magnetic Properties and Magnetic Domain Structure of Amorphous FeTaC Thin Films,” Journal of Material Science & Engineering, vol. 07, no. 03, 2018, doi: 10.4172/2169-0022.1000455

Its experimental study of seismic Performance is carried out from the following three aspects: material properties of soil and mechanical properties of adobe masonry, bearing capacity and seismic performance of the bearing wall, seismic performance and whole constructional measures of housing structure.
Soil Test and Experimental Study on Mechanical Properties of Adobe Masonry.
However, soil as a basic building material of raw-soil structure, mechanical properties of adobe wall or bulk with the formation of wet soil or dry is very little studied currently.
By these tests, scholars obtained the failure mode, failure process, load-displacement curve, the compressive and shear strength of the clods, analyzed the main factors impacting material properties of raw-soil structure, and got results that soil type, soil admixtures, soil moisture and soil vertical stress and other factors directly affect the soil compression, shear properties and the appropriate straw, lime, admixture can improve the properties of soil.
These results provide a reference for the study of seismic performance, mechanical properties of raw-soil wall, and a reference for standards of raw-soil structure compilation and further research.

The compressive strength is one of the most important mechanical properties of concrete.
Yang and Huang [17] demonstrated that the compressive strength of lightweight aggregate concrete is mainly affected by the properties and volume fraction of aggregate.
Model B: The LWAC strength model is based on the properties of LWA alone.
J., Effect of Coarse Aggregate Characteristics on Mechanical Properties of High-Strength Concrete, ACI Materials Journal, 1990, 87, 2, pp 103–107
Z., Mechanical Properties of Lightweight Aggregate Concrete — Effect of Lightweight Aggregate on the Concrete, PhD thesis, City University of Hong Kong, 2006 [17] Yang C.

The mechanical properties of the fibers were measured.
The results demonstrate that due to the presence of gelation in the composite fibers, the mechanical properties of the composite fibers increase, and the tensile strength of the composite fibers is also related to gelation content and the degree of deacetylation of chitosan.
Measurements of properties.
The NaOH concentration and the volume ratio of NaOH solution to ethanol are the important factors influencing the coagulation speed of the fibers.
Effect of gelatin content on fiber properties.

Introduction Osseointegrated titanium implants have been widely used in clinics for replacement of missing teeth, and the surface properties of titanium implants are closely related to the process of osseointegration.
The mechanism includes forming Bungner bands for the growth of nerve axons, remyelination, secretion of neurotrophic factors, and so on.
As shown in Fig. 3, the cell morphology was not affected by both MAO coating and the smooth titanium discs.
The amount of brain-derived neurotrophic factor (BDNF) in the conditioned medium was measured by ELISA in this study.
BDNF is one of most important growth factors secreted by Schwann cells, and considered to be essential for the regeneration of periodontal mechanical receptors.

Therefore, the properties of metal matrix and its diamond retention capacity are key factors in governing the performance and useful life of the tools [1,2].
Alloying is an effective method to improve the properties of metal materials and has been widely used for many decades in the materials produced by fusion metallurgy.
Effects of some elements, such as Cr, Co, Ni, Mn and Al on the mechanical properties of both compact and porous metal- bonded diamond composites have been published in our previous report [7].
However, as it was presented in our previous report [7], the addition of Cr, Co, Ni, Mn, Al did not bring much positive effect on the mechanical properties of metal bonds or diamond composites.
Though the addition of Cr or Co seems to have no obvious effects on improving the mechanical properties of metal bonds and diamond composites, stronger bonding between the meal bond and diamond grit was obtained by the tightly attached of the metal bond with diamond grit as shown in Fig.5 and Fig.6.

Unique and desirable properties of composites, converted them to one of the favorable materials in a wide range of applications.
In the production lines of this industry, sandwich composites are becoming a preferred alternative to metals, because of their superior mechanical properties.
Composite Sandwich Joint and Its Applications A structural sandwich is a special form of composite which is combination of different materials that are bonded to use the properties of each component and provide structural advantage for the whole assembly.
The structure in passenger aircraft and especially components inside the cabin involved different types of composite materials where requests are not only high stiffness to weight ratio but also fire safety properties is an important factor.
Ashby, Cellular solids: structure and properties, Cambridge University Press, 1999

These characteristics and properties have led to its widespread use in the manufacturing sector.
The principal factors that affect the structural integrity of any aluminium opening are the choice of the bar profile for a given dimension of the opening (relating to the bending stresses caused by wind loading) as well as the workmanship in making the joints correctly.
The forced entry with damage to the structure relates to the ‘soft’ mechanical property of aluminium, which means it can be bent and distorted by tools such as crowbar.
Properties of glass were already available in the SolidWorks database and were found to be close to those of glass typically used in openings.
Conclusion This study brought to light several issues affecting the performance of aluminium openings.