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  • Trans Tech Publications, Ltd.  (8)
  • Zhao, Mei Rong  (8)
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  • Trans Tech Publications, Ltd.  (8)
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  • 1
    Online Resource
    Online Resource
    Resonance Frequency Detection System of Piezoelectric Micro-Cantilever
    Trans Tech Publications, Ltd. ; 2012
    In:  Advanced Materials Research Vol. 443-444 ( 2012-1), p. 115-120
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 443-444 ( 2012-1), p. 115-120
    Abstract: A kind of resonance frequency detection of piezoelectric micro-cantilever is presented, where there is piezoelectric film deposited. The alternating current is put on the film to make it vibrate, and when resonance frequency happens, the amplitude of piezoelectric micro-cantilever reaches the maximal. A series of experiments have been done by the driving power and detecting power designed by ourselves. The experiments show that resonance frequency can be detected by the amplifier, and the amplitude of the resonance frequency is obviously bigger than the amplitude of the other frequency. The maximal amplitude is about 600nm.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.443-444
    DOI: 10.4028/www.scientific.net/AMR.443-444.115
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2265002-7
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  • 2
    Online Resource
    Online Resource
    The Effect of Fillet Geometry on Stress in Weld-Bonded Joints
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 97-101 ( 2010-3), p. 767-770
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 97-101 ( 2010-3), p. 767-770
    Abstract: The influence of fillets with different geometry shape on the stress distribution in aluminum alloy weld-bonded single lap joint was investigated using elasto-plastic finite element method (FEM). The results show that it is advantageous of reducing stress concentration in adhesive layer near the ends of the lap zone in single lap weld-bonded aluminum joints and part of the stress transferring from adhesive layer to the nugget when the joints with a couple of right triangle fillets over other shapes. The load-bearing capacity of the whole weld-bonded joints may be improved. The full-triangular fillet is recommended that it be more advantageous of decreasing the stress peak value and making the stress distribution in overlap zone more uniform.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.97-101
    DOI: 10.4028/www.scientific.net/AMR.97-101.767
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 3
    Online Resource
    Online Resource
    Analysis of Interface Stress of Sn3.5Ag0.75Cu Solder under Temperature Cycle QFP Device
    Trans Tech Publications, Ltd. ; 2011
    In:  Applied Mechanics and Materials Vol. 55-57 ( 2011-5), p. 1468-1472
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 55-57 ( 2011-5), p. 1468-1472
    Abstract: Using elastoplastic finite element method study the interface stress distribution of Sn3.5Ag0.75Cu lead-free solder at different temperatures and different strain rate. Numerical analysis results show that: when strain-rate is identical, as the temperature rises, the interface stress increased rapidly of Sn3.5Ag0.75Cu lead-free solder and the substrate binding sites, from 11 °C when 2.6MPa rose to 90 °C in 49.7MPa, so the temperature is very large have effects of the interface stress of the lead-free solder and the substrate binding sites; when the temperature is constant, as the strain rate increases, Sn3.5Ag0.75Cu lead-free solder and the substrate binding sites of the interface stress showed a slight increase, from 0.005% / S when the 49.47MPa rose to 0.005% / S when the 50.08MPa, so strain rate on lead-free solder and the substrate binding sites of the interface stress effect is very small, indicating Sn3 .5Ag0.75Cu lead-free solder has strong rate-independent nature.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.55-57
    DOI: 10.4028/www.scientific.net/AMM.55-57.1468
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2251882-4
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  • 4
    Online Resource
    Online Resource
    The Influence of Different Factors on the Stress Distribution of Strip Joints
    Trans Tech Publications, Ltd. ; 2012
    In:  Advanced Materials Research Vol. 602-604 ( 2012-12), p. 2140-2144
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 602-604 ( 2012-12), p. 2140-2144
    Abstract: The finite element method was used to study the stress distribution of strip joints under different elastic modulus and crack length. The results show that with the elastic modulus increases, the crack tip of the peak stress also increases, which provide maximum load continue to expand on the joint crack is SY stress, while little impact to the continued crack expansion on joints is SXY stress. I-type crack perpendicular the surface Crack under the stress of characteristics; With the initial crack length increases, I-stress intensity factor present weak tendency to increase, II-stress intensity factor is still almost zero, so that even after a longer crack length, strip adhesive joints under load the fracture is still mainly based on I-type crack, which is also consistent with the strip load characteristics: external stress perpendicular to crack surface. Another I-type stress intensity factor slight increasing trend.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.602-604
    DOI: 10.4028/www.scientific.net/AMR.602-604.2140
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2265002-7
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  • 5
    Online Resource
    Online Resource
    A Numerical Analysis of Double Notch on Stress Distribution in Single Lap Aluminium Joints
    Trans Tech Publications, Ltd. ; 2008
    In:  Key Engineering Materials Vol. 385-387 ( 2008-7), p. 417-420
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 385-387 ( 2008-7), p. 417-420
    Abstract: The stress distributed in the mid-bondline of the joints made of aluminium alloy and an epoxy adhesive was determined with the ANSYS software. The results from the FEA showed that the values of the peak stresses of the all the stress components (including the longitudinal stress Sx, the peel stress Sy, the shear stress Sxy, the 1st principal stress S1 and the von Mises equivalent stress Seqv) distributed in the mid-bondline are changed a little as the notch distance L was increased while the notch depth d was not great than 0.6mm. But the evidently changes occurred when the notch depth d was great than 0.9 mm for the stress Sx, Sy and S1 distributed in both the mid-bondline and the interface of the lap zone. When taken the stress distributed in the middle part of the lap zone into account, the peak stress at the point in the mid-bondline corresponding to the edge of the notch decreased firstly and then increased again as the notch distance L was increased from 0 mm to 8 mm. The proper geometry of the notch in the specimen was chosen by finite element analysis.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.385-387
    DOI: 10.4028/www.scientific.net/KEM.385-387.417
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2073306-9
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  • 6
    Online Resource
    Online Resource
    Effect of Recessing in Bondline on Stress in Co-Axial Lap Joint
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 97-101 ( 2010-3), p. 952-955
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 97-101 ( 2010-3), p. 952-955
    Abstract: The effect of recessing on the stresses distributed along the mid-bondline in both standard single lap joints and co-axial ones were analyzed using elasto-plastic finite element method (FEM). The results obtained show that the values of the peak stresses of all the stresses distributed in the mid-bondline were changed greatly as the preformed angle in over lap zone was about 10 0 when the high elastic modulus adhesive is used. The effect of the elastic modulus level on the stress distribution (especially the peak stresses) is small in the middle part of the lap zone. When taken the stress distributed in the middle part of the lap zone into account, there is nearly no significant difference between the peel stress distributed in the standard joint and co-axial single lap joint when the adhesives with lower elastic modulus was used. It is recommended that a co-axial joint is suitable for the recessing joint made by aluminum alloy and a higher elastic modulus adhesive.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.97-101
    DOI: 10.4028/www.scientific.net/AMR.97-101.952
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 7
    Online Resource
    Online Resource
    A FEM Study on Thermal Stress in Laminated Composite
    Trans Tech Publications, Ltd. ; 2008
    In:  Key Engineering Materials Vol. 373-374 ( 2008-3), p. 786-789
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 373-374 ( 2008-3), p. 786-789
    Abstract: The 3-D elasto-plastic finite element method (FEM) was used to analyze the thermal stress in the laminated composite (SiC/6061Al) under the condition of a temperature cycling of 200 0C-30 0C- 200 0C-30 0C. The results from the FEM analysis showed that the hysteretic peak value of the von Mises equivalent stress in the substrate 6061Al was increased significantly as the temperature loading cycles processed on but it was nearly the same after the first cycle in the interface layer SiC of the laminated composite. The elastic strain in the substrate 6061Al varied within the range of -0.15% to 0.15% and the maximum plastic deformation was equal to about 0.26 %. The results also showed that the maximum normal stress Sx was increased from 32.8 MPa to 87.9 MPa after ten cycles and the work-hardening of the substrate 6061Al occurred during the stress and strain hysteresis loop.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.373-374
    DOI: 10.4028/www.scientific.net/KEM.373-374.786
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2073306-9
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  • 8
    Online Resource
    Online Resource
    Research on Real-Time Vision Detection Method for Sanitary Labels
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 300-301 ( 2013-2), p. 484-489
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 300-301 ( 2013-2), p. 484-489
    Abstract: Taking diaper which is a representative production of sanitary supplies as an example, a real-time detection method for diaper label based on machine vision is developed. To identify the location of diaper surface label position rapidly, a visual inspection system platform applies to production line is built. Images are captured with high-resolution colorful CCD industrial camera and NC template matching method is adopted as the surface label detection algorithm. Meanwhile, the comparative experiments results among NC, ABS method and Moment Matching method are presented. Experimental results show that this label detection system can realize accurate identification on the condition of different light, whose recognition rate can reach up to 97% and detection algorithm is of preferable instantaneity and stability.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.300-301
    DOI: 10.4028/www.scientific.net/AMM.300-301.484
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2251882-4
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