检索结果-南通市图书馆

Analysis on the turning point of dynamic in-plane compressive strength for a plain weave composite

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第2期32卷 485-495页

作者： Xiaoyu Wang Zhixing Li licheng guo Zhenxin Wang Jiuzhou Zhao Department of Astronautic Science and Mechanics Harbin Institute of TechnologyHarbin150001China AECC Commercial Aircraft Engine Co LTDShanghai201108China

Experimental investigations on dynamic in-plane compressive behavior of a plain weave composite were performed using the split Hopkinson pressure bar. A quantitative criterion for calculating the constant strain rate of composites was established. Then the upper limit of strain rate, restricted by stress equilibrium and constant loading rate, was rationally estimated and confirmed by tests. Within the achievable range of 0.001/s-895/s, it was found that the strength increased first and subsequently decreased as the strain rate increased. This feature was also reflected by the turning point(579/s) of the bilinear model for strength prediction. The transition in failure mechanism, from local opening damage to completely splitting destruction, was mainly responsible for such strain rate effects. And three major failure modes were summarized under microscopic observations: fiber fracture, inter-fiber fracture, and interface delamination. Finally, by introducing a nonlinear damage variable, a simplified ZWT model was developed to characterize the dynamic mechanical response. Excellent agreement was shown between the experimental and simulated results.

关键词： Plain weave composite Dynamic strength Quantitative criterion Turning point Failure mechanism

Cloning, Expression and Characterization of Translationally Controlled Tumor Protein (TCTP) Gene from Flatfish Turbot (Scophthalmus maximus)

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2008年第2期7卷 184-192页

作者： WANG Jian guo Huarong ZHANG Shicui YIN licheng guo Bin WANG Shaojie College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China

A full-length cDNA encoding translationally controlled tumor protein of marine flatfish turbot （Scophthalmus maximus）, SmTCTP, was isolated with rapid amplification of cDNA Ends （RACE）. SmTCTP consisted of a 5＇ untranslated region （UTR） of 84 bp, a 3＇ UTR of 451 bp and an open reading frame （ORF） of 513 bp, encoding a protein of 170 amino acid residues, which contained two signature sequences of TCTP family. The 5＇UTR of SmTCTP started with a 5＇-terminal oligopyrimidine tract （5＇-TOP）, a typical feature for translationally controlled mRNAs. The deduced amino acid sequence of SmTCTP was similar to the other known vertebrate TCTPs in a range of 58.8% to 64.1%. The length of fish TCTPs was diverse among species, e.g., TCTP of turbot and sea perch （Lateolabraxjaponicus） is 170 aa in length, while that of zebrafish （Danio rerio） and rohu （Labeo rohita） is 171 aa in length. Northern blot analysis revealed that SmTCTP has only one type of mRNA. Its expression level in albino skin was slightly higher than that in normal skin. We constructed the pET3Oa-SmTCTP expression plasmid. The recombinant protein of His-tag SmTCTP was over-expressed in E. coli, purified and identified with peptide mass fingerprinting. These results may pave the way of further investigation of the biological function of TCTP in fish.

关键词： translationally controlled tumor protein (TCTP) turbot RACE Northern blot expression peptide mass fingerprinting

Investgation on transient heat transfer of 3D braided composites

在线全文

学校读者我要写书评

暂无评论

Investgation on transient heat transfer of 3D braided compos...

23rd International Congress of Theoretical and Applied Mechanics

作者： Suyang Zhong licheng guo Department of Astronautic Science and Mechanics Harbin Institute of Technolosv

＜正＞In this paper a finite element modeling method based on nonhomogeneous elements is proposed for 3D braided *** representative volume element（RVE） model is *** transient heat transfer behaviour of this composit...

关键词：

Phytochemistry,bioactivities,and future prospects of Callicarpa nudiflora:A review

在线全文

cnki会议

学校读者我要写书评

暂无评论

Medicinal Plant Biology 2022年第1期1卷 31-44页

作者： Yan Ma licheng guo Wencheng Hou Jinsheng Zhuo Mingming Zhao Yangyang Liu College of Traditional Chinese Medicine Hainan Medical UniversityHaikou 570100China Hainan Branch of the Institute of Medicinal Plant Development(Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) Chinese Academy of Medical Sciences&Peking Union Medical CollegeHaikou 570311China Hainan Hospital of Traditional Chinese Medicine Haikou 570203China

This work was supported by Hainan Province Science and Technology Special Fund of China(***2021034)and the Hainan Province Natural Science Foundation of China(No.822RC697).

关键词： Hainan ZDK Natural

Influence of residual strain on the fracture of magneto-electro-elastic materials using an interaction integral method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of residual strain on the fracture of magneto-elec...

中国力学大会-2021+1

作者： Shuai Zhu Hongjun Yu Canjie Huang Minghui Zhao licheng guo Department of Astronautic Science and Mechanics Harbin Institute of Technology

Introduction Magneto-clectro-elastic (MEE) materials generally consist of piezoelectric and piezomagnetic constituent phases so that the residual strain often occurs during the manufacturing process of MEE *** distributed residual strain and complex interfaces between constituents cause a great challenge to the fracture analysis of MEE *** the effect of the residual strain,this paper develops an interaction integral (l-integral) method for the extraction the fracture parameters of an impermeable crack in nonhomogeneous MEE materials.

关键词：

Research on Variation Law of Back-Calculation Modulus of Asphalt Pavement Layer

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research on Variation Law of Back-Calculation Modulus of Asp...

作者： licheng guo guodong Zeng Xiangpeng Yan Wenjuan Wu Jincheng Wei Foshan Highway & Bridge Construction Co.Ltd

Based on in-situ FWD testing and laboratory dynamic modulus test,the influence of loading level,position and pavement temperature on FWD back calculated modulus and the relation between bacalculated modulus and dynamic modulus was *** structure combination of asphalt layer was determined based on pavement temperature profile and the composite modulus was calculated based on laboratory modulus test and in-situ measured pavement *** results show that loading level had little influence on bacalculated modulus and testing position had much more influence on bacalculated modulus than loading *** backalculated modulus and composite modulus decreased with temperature increase,when temperature was low backalculated modulus was greater than composite modulus,when temperature was in room temperature backalculated modulus was equal to composite modulus and when temperature was high backalculated modulus was less than composite *** relation between bacalculation modulus and temperature,temperature correction coefficient for bacalculation modulus was developed and for relation between backcalculation modulus and composite dynamic modulus,correction coefficient model between them was developed.

关键词： FWD back-calculation modulus composite dynamic modulus temperature correction coefficient laboratory and in-situ modulus correction coefficient

A new phase field model with mixed-mode driving force of power-law relation

在线全文

cnki会议

学校读者我要写书评

暂无评论

A new phase field model with mixed-mode driving force of pow...

中国力学大会-2021+1

作者： Liulei Hao Rilin Shen Hongjun Yu Zhen Shen licheng guo Harbin Institute of Technology

Introduction/Highlight A new phase field model is proposed through introducing a power function of mixed-mode energy release rates (ERRs) as the crack driving *** with the traditional phase field models involving only mode-I critical ERR G,the present phase field model takes mode-Ⅱcritical ERR G into account to predict the crack propagation behavior for the materials with huge mode-Ⅱcritical ERR (G/G～10).Then,this work estimates the influences of power factorsαandβon crack propagation *** the purpose of validation,rock-like materials with a single flaw under compression are studied and the proposed model can capture the propagation pattern of wing crack emergence followed by

关键词：

在线全文

cnki会议

学校读者我要写书评

暂无评论

佛山富龙西江特大桥主桥设计

桥梁建设 2023年第6期53卷 127-134页

作者：李兵姚云龙郭立成洪宝宁佛山市建盈发展有限公司广东佛山528041 河海大学土木与交通学院江苏南京210098

佛山富龙西江特大桥主桥为(69+176+580+176+69)m双塔双索面混合梁斜拉桥,全宽41.4 m(含风嘴)。该桥采用半飘浮体系,桥塔下横梁设置竖向支座及横向抗风支座,塔梁间设置纵向阻尼器。桥塔采用融入佛山文化性与地域性特征的“白鹭”形桥塔... 详细信息

佛山富龙西江特大桥主桥为(69+176+580+176+69)m双塔双索面混合梁斜拉桥,全宽41.4 m(含风嘴)。该桥采用半飘浮体系,桥塔下横梁设置竖向支座及横向抗风支座,塔梁间设置纵向阻尼器。桥塔采用融入佛山文化性与地域性特征的“白鹭”形桥塔。主梁采用混合梁,边跨为混凝土箱梁;中跨为超高性能混凝土(UHPC)组合梁,由高3.1 m的槽形钢主梁和带PBL剪力键的UHPC组合桥面板构成。斜拉索采用∅7 mm锌铝合金镀层平行钢丝斜拉索,标准抗拉强度1770 MPa。桥塔墩采用钻孔灌注桩基础,辅助墩和过渡墩均采用分幅式板式墩。建立该桥的空间有限元模型进行静、动力分析,结果表明:该桥整体静力性能、抗风及抗震性能均符合规范要求。

关键词：斜拉桥半飘浮体系桥塔 UHPC桥面板静动力分析桥梁设计

直接前方入路全髋关节置换术治疗强直性髋关节炎

在线全文

学校读者我要写书评

暂无评论

中华关节外科杂志（电子版） 2020年第3期14卷 280-285页

作者：郭立成徐杰福建医科大学省立临床医学院福州350001 福建省立医院福州350001

目的探讨直接前方入路全髋关节置换术在治疗强直性髋关节炎中的临床效果。方法回顾性分析2015年10月至2018年10月于福建省立医院行全髋关节置换术的强直性髋关节炎62例(66髋),纳入强直性脊柱炎合并髋关节炎行全髋关节置换的患者,排除脊... 详细信息

目的探讨直接前方入路全髋关节置换术在治疗强直性髋关节炎中的临床效果。方法回顾性分析2015年10月至2018年10月于福建省立医院行全髋关节置换术的强直性髋关节炎62例(66髋),纳入强直性脊柱炎合并髋关节炎行全髋关节置换的患者,排除脊柱畸形严重患者。根据手术入路分为直接前入路组和后外侧入路组,比较手术切口长度,术中出血量的差异,通过Harris髋关节功能评分、影像学评价两组患者手术效果。计量资料采用t检验,计数资料采用卡方检验。结果直接前入路组和后外侧入路组在手术切口长度和术中出血量的差异无统计学意义(t=1.346、1.272,均为P>0.05)。末次随访平均(25±11)个月,所有患者均解除疼痛,恢复髋关节活动功能。直接前入路组Harris评分术前平均(61±14)分,术后平均(97.8±2.9)分。后外侧入路组Harris评分术前平均(59.3±14.3)分,术后平均(97.4±3.3)分。两组组内术后Harris评分均明显高于术前(t=14.229、14.729,P0.05)。术后X线片两组均无骨溶解及假体松动等征象,未发生术后并发症。结论直接前方入路全髋关节置换治疗强直性髋关节炎的临床效果满意。

关键词：关节成形术置换髋脊柱炎强直性关节强直