橡膠彈性(編輯修改稿)
2025-02-08 23:36 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 rea is the area of a crosssection of the object, in a plane perpendicular to the direction of the force. Stress is usually expressed in units of force divided by area, such as N/m2. Strain 應(yīng)變 ? ? 伸長(zhǎng)率 elongation ratioStrain the amount of deformation a sample undergoes when one puts it under stress. Strain can be elongation, bending, pression, or any other type of deformation. Tensile modulus 拉伸模量 or Young’s modulus 楊氏模量柔量 ComplianceModulus the ability of a sample of a material to resist deformation. Shear 剪切剪切位移 S， 剪切角 ?， 剪切面間距 d剪切應(yīng)變 ?剪切應(yīng)力Shearing stressShear modulus and pliance in shear 剪切模量和剪切柔量簡(jiǎn)單剪切實(shí)驗(yàn)?zāi)馨迅呔畚锖暧^力學(xué)性能與它們內(nèi)部分子運(yùn)動(dòng)相聯(lián)系，建立高聚物力學(xué)行為的分子理論。 ?固體?液體?粘彈體適用Compression 壓縮壓縮應(yīng)變 Compression strain壓縮模量 Modulus of pressionThe relationship between Young’s modulus E, shear modulus G and pression modulus BPossion ratio 泊松比 ?Possion ratios for different polymers泊松比數(shù)值 解釋 不可壓縮或拉伸中無(wú)體積變化 沒(méi)有橫向收縮~ 橡膠的典型數(shù)值~ 塑料的典型數(shù)值 Thermodynamical analysis of rubber elasticity 橡膠的熱力學(xué)分析l 0– Original lengthf – tensile forcedl – extended lengthtensileP— 所處大氣壓dV— 體積變化外力作用引起熵變?橡膠彈性是熵彈性?回彈動(dòng)力是熵增First law of thermodynamicsdU=dQdWdU – 體系內(nèi)能 Inter
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1