比刚度

虽然具有良好的比刚度、比强度，然而PMMC的低塑性和低韧性一直是阻碍其进一步应用的障碍。

Although has the good specific stiffness and specific strength . However , low plasticity and low toughness of PMMC , has been an obstacle to hinder its further application .

镁合金具有高的比刚度和比强度，被誉为二十一世纪绿色工程材料。

Mg-Al alloy is popular for its high specific stiffness and specific strength .

当芯子为PMI泡沫，比刚度最高。

And while the core is PMI foam , specific flexural stiffness of the sample is the highest .

TiAl合金因其轻质、高温下高比强度、比刚度以及抗蠕变和抗氧化性能突出等优点，在航空航天等高温材料领域有极广泛的应用。

TiAl alloys are widely used because they possess light quality and excellent elevated temperature properties such as high strength retention , resistance to creep and oxidation .

因密度、比刚度、高温比强度和阻燃性等方面的优势，TiAl基金属间化合物被认为是最有应用潜力的新一代结构材料。

Due to their advantages in density , specific rigidity , specific high temperature strength and burning resistance , the TiAl based alloys are considered a new generation of high temperature structural materials of the most potential applications .

Mg-Al系合金是最具有代表性的高比强度、比刚度合金，在航空航天领域有着比较广阔的应用前景，是目前镁合金的重要研究方向之一。

Mg-Al alloy is representative light alloy with high specific strength and high specific stiffness . They are under intensive research currently with promising application potential in fields of aeronautical and astronautical engineering .

镁具有很高的比刚度和比强度，良好的散热性能、减振性能和电磁屏蔽性能等优良的综合性能，因而在航空航天、汽车以及3C产品领域有广阔的应用前景。

Magnesium has wide application prospect in the area of aerospace , automotive , and 3C products because of its good properties such as high stiffness / density and strength / density ratio , excellent capacities of heat dissipation , damping and electromagnetic shielding .

随孔隙率增加，弯曲比刚度P/δ下降。

With the increase of porosity , the specific stiffness ( P / δ) decreased .

基于结构仿生理论的高比强度、比刚度结构设计研究

Research on The High Specific Strength and Specific Stiffness Structure Design Based on The Structural Bionic Theory

镁及镁合金具有密度小、比刚度和比强度高、尺寸稳定性好等特点，已成为现代高新技术领域中最有希望的一种材料。

Magnesium and magnesium alloys possess very low density , high specific strength and stiffness and good dimension stability capabilities .

镁合金因其高比强度、比刚度被认为是最具潜力的材料。

Magnesium alloys are considered to be potential materials for their high specific strength and high specific stiffness in unit mass .

碳纤维立体编织复合材料具有轻质、比刚度高、比强度高、疲劳性能优异等特点，具有广泛的应用前景。

3-D woven carbon fiber composites are of lightweight , high stiffness , high strength , and excellent fatigue performance characteristics , with a wide range of applications .

柔度法根据杆件内部力与节点力的平衡建立了内力形函数，在加载过程中结构和杆件始终满足力的平衡和协调条件，因而能够得到比刚度法更精确的结果。

Flexibility methods are based on force shape functions , which satisfy the equilibrium and harmony throughout the loading phases , and hence can obtain more exact results .

镁合金具有密度小、弹性模量小和比刚度高等特点，其综合力学性能与人体骨骼相近。

Magnesium alloys have the character of low density , low modulus of elasticity and high specific stiffness , and its mechanical properties are close to the human skeleton .

泡沫铝层合梁具有较低的密度（（0.42～0.92）×10~3kg/m~3）和很高的弯曲比刚度（E~（1/2）/ρ）。

Sandwich beams with Al foam cores are found to have low density ( 0.42-0.92 ), but a very high value of specific bending stiffness , E1 / 2 / p.

蜂窝纸板是一种环保型包装材料，具有质量轻、比刚度和比强度高等优点，主要用于制造包装箱、托盘及缓冲衬垫。

As one kind of environmentally friendly packaging material , honeycomb paperboard is mainly used in paperboard box , pallet and cushion pad for its light weight and high specific strength and specific stiffness .

将二维机织碳布和单向预浸料碳布按照一定比例铺设成的混合机织复合材料兼具比刚度、比强度高、抗低速冲击损伤以及工艺性好等优点。

The mixed woven composites being laid up by these two kinds of layers alternately can have the advantages of impact performance , stiffness and strength together , and the processibility is good also .

由于具有比刚度比强度高等优异的力学性能，纤维增强树脂基复合材料结构在航空航天、海洋工程及汽车等各种民用领域具有广泛而重要的应用。

Fiber reinforced polymer-matrix composites are widely used in aerospace , marine engineering and various civil applications , such as automobiles and so on , due to their exceptionally high specific stiffness and strength .

镁合金具有较高的比刚度、导热性及良好的电磁屏蔽性，是目前在航空和汽车工业领域具有巨大潜在应用的结构材料之一。

Magnesium alloy has a high ratio of stiffness , good thermal conductivity and electromagnetic shielding . As a kind of structural materials , it has great potential applications in aviation and automotive industry currently .

纤维增强复合材料具有良好的比刚度、比强度和阻尼特性且密度低，已经作为一种主要的结构材料应用于航天、舰船、汽车等工程领域。

Fiber reinforced composites have good specific stiffness , specific strength , damping property and low density . As structural materials , composites have been used in aerospace , ships , automobile and other engineering fields .

与使用金属补片进行修补相比，由于复合材料具有比刚度、比强度大、抗疲劳性能好、具有可设计性等优点，所以通过复合材料胶接修补来加强裂纹结构更有优势。

Compared with the use of metal , bonded composite patches to reinforce the cracked structure is more promising due to the high stiffness , high strength , good anti-fatigue performance and designability of the composite .

场地覆盖土层厚度和等效剪切波速相近（即属于同一类场地）的单层土上整体模型比刚度随深度逐渐增大的多层土上整体模型的周期放大系数小；

The natural vibration period increment in the integral model on single layer soil with similar thickness and equivalent shear wave velocity is smaller than that in the model on multi-layer soil whose rigidity increases with depth .

夹层结构因具有较高的比刚度和比强度，且可实现隔声、隔震及隔热等优点，被广泛应用于航空、航天、建筑及交通运输等领域。

Sandwich structures are widely used in the fields of spacecrafts , architecture and transportation because of their outstanding performances such as excellent high strength , stiffness ratio and good sound insulation , ant-vibration and thermal insulation performance .

纤维增强复合材料因其强度和比刚度高，抗冲击性能好以及结构的可设计性强等诸多优点而被广泛应用于航空航天、压力容器、汽车零部件和体育用品等领域。

Fiber reinforced polymer composites have been used widely in many applications such as aerospace , pressure vessels , automobile parts and sport equipments due to their high specific strength , high specific stiffness and specific energy absorption .

镁及其合金具有非常独特的物理性能，例如密度小、比刚度大、比强度高等，使其在电子信息产品、航空航天、汽车减重等方面的应用具有广阔的前景。

Magnesium and its alloys have broad prospects in electronic information products , aerospace , automotive weight loss and other applications because of its unique physical properties , such as low density , high specific strength and specific stiffness .

作为一种具有高比强度和比刚度的轻质金属材料，镁合金因其质量轻、比强度高，在汽车工业中的应用越来越广泛，因此如何安全使用镁合金已受到人们的普遍关注。

As the light metallic materials with high specific strength and high specific rigidity , magnesium alloys have been widely used in automobile industry . Thus , how to utilize safely magnesium alloys has been paid much more attention .

目前，单一材料的圆柱壳已经满足不了人们的需求，复合材料圆柱壳有较高的比刚度与比强度，已经在国民经济建设中发挥着不可代替的作用。

At present , a single material cylindrical shell has failed to meet the needs of people , composite materials have the higher specific stiffness and specific strength , and have been playing an irreplaceable role in the building of the national economy .

镁及其合金因其低密度、高比强度和比刚度等优异的物理和机械性能，在汽车、电子、家电、通信以及航天、航空等领域的应用日益增多。

Magnesium and its alloys have a number of applications in automobile and computer parts , aerospace components , mobile phones , and household equipment etc for their excellent physical and mechanical properties , such as low density , high strength and high stiffness .

聚合物基复合材料作为工程材料，以其比刚度高、比强度高、耐腐蚀和抗疲劳性能好、可设计性强等优异性能广泛应用于航空航天等高科技工业中。

As a kind of engineering material , polymer matrix composite has been widespread used in aerospace and other high-tech industries due to its high specific stiffness , high specific strength , good corrosion resistance , good fatigue resistance , good designability and other excellent properties .

钛合金具有良好的比刚度、比强度以及较高的耐热性能，是高性能发动机减轻结构重量、提高推重比不可或缺的关键材料，因而在现代航空发动机风扇、压气机及其它构件中得到了广泛应用[1-3]。

With nicer specific stiffness , specific strength and higher heat resistance , titanium alloy is the key material for high performance aero-engine to reduce weight and improve thrust-to-weight ratio . Thus it is widely used in fan , compressor and other components of modern aero-engines .