智科眼

请选择以下任意方式登录

已有帐号?

验证码登录

微信登录

忘记密码
未收到验证码?
注册

微信注册

智科眼: 双语看懂新世界
材料科学 40096
Researchers(研究人员) have(已经) demonstrated(证明) that(that) vehicle(车辆) armor(装甲) using(使用) composite metal(复合金属) foam(泡沫) (CMF)((CMF)) can(可以) stop(阻止) ball() and() armor-piercing(穿甲) .50(.50) caliber(口径) rounds(子弹) as well as(以及) conventional(传统) steel(钢制) armor(装甲),(,) even though(即使) it() weighs(重量) less than half(不到一半) as(as) much(much).(.) The finding(发现) means(意味着) that(that) vehicle(车辆) designers(设计师) will() be(be) able(能够) to(to) develop(开发) lighter(更轻) military(军用) vehicles(车辆) without(without) sacrificing(牺牲) safety(安全性),(,) or(或者) can(可以) improve(提高) protection(保护) without(without) making(使) vehicles(车辆) heavier(更重).(.)
CMF(CMF) is(is) a(一种) foam(泡沫) that(that) consists(组成) of(of) hollow(空心),(,) metallic(金属) spheres(球体)()made(制成) of(of) materials(材料) such as(例如) stainless steel(不锈钢) or() titanium()()embedded(嵌入) in(in) a(a) metallic matrix(金属基体) made(制成) of(of) steel(),(,) titanium(),(,) aluminum() or() other(其他) metallic(金属) alloys(合金).(.) In(In) this(这项) study(研究),(,) the researchers(研究人员) used(使用) steel()-()steel() CMF,(CMF,) meaning(意味) that(that) both(both) the spheres(球体) and() the matrix(基体) were(were) made(made) of(of) steel().(.)
For(For) the study(研究),(,) researchers(研究人员) manufactured(制造) a(一种) hard(硬质) armor(装甲) system(系统) consisting(包括) of(of) a(a) ceramic(陶瓷) faceplate(面板),(,) a(a) CMF(CMF) core() and() a(a) thin() back plate(背板) made(制成) of(of) aluminum().(.) The armor(装甲) was(was) tested using(进行测试) .50(.50) caliber(口径) ball() and() armor-piercing(穿甲) rounds().(.) The armor(装甲) was(was) tested(测试) with(with) the rounds(炮弹) being(being) fired(发射) at(at) impact velocities(冲击速度) from(from) 500(500) meters() per second(每秒) up(up) to(to) 885(885) meters() per second(每秒).(.)
The CMF(CMF) layer() of(of) the armor(装甲) was(was) able(能够) to(to) absorb(吸收) 72-75%(72-75%) of(of) the kinetic energy(动能) of(of) the ball() rounds(),(,) and() 68-78%(68-78%) of(of) the kinetic energy(动能) of(of) the armor-piercing(穿甲) rounds().(.)
"(")The CMF(CMF) armor(装甲) was(was) less than half(不及一半) the weight(重量) of(of) the rolled(轧制) homogeneous steel(均质钢) armor(装甲) needed(所需) to(to) achieve(实现) the same(同等) level(水平) of(of) protection(保护),"(,") says() Afsaneh(Afsaneh) Rabiei(Rabiei),(,) corresponding(通讯) author(作者) of(of) a(a) paper(论文) on(on) the work(工作) and() a(a) professor(教授) of(of) mechanical(机械) and(and) aerospace engineering(航天工程) at(at) North Carolina State University(北卡罗莱纳州立大学).(.) Rabiei(Rabiei),(,) the inventor(发明者) of(of) CMF,(CMF,) has(has) spent() years(数年) developing(开发) and() testing(测试) CMF(CMF) materials(材料).(.)
"In("换句话说) other() words(),(,) we(我们) were(were) able(能够) to(to) achieve(达到) significant(显著) weight(重量) savings(减轻)()which(which) benefits(有利于) vehicle(车辆) performance(性能) and() fuel efficiency(燃油效率)()without(without) sacrificing(牺牲) protection(保护),"(,") Rabiei(Rabiei) says().(.)
"(")This(这项) work(工作) shows(表明) that(that) CMF(CMF) can(可以) offer(提供) a(a) significant(显著) advantage(优势) for(for) vehicle(车辆) armor(装甲),(,) but() there(there) is(is) still(仍有) room(空间) for(for) improvement(改进),"(,") Rabiei(Rabiei) says().(.) "(")These(These) findings(研究结果) stem from(源于) testing(测试) armors(装甲) we(我们) made(made) by(通过) simply(简单地) combining(相结合) steel()-()steel() CMF(CMF) with(with) off(现在的)-()the-()shelf() ceramic(陶瓷) face plates(面板),(,) aluminum() back plate(背板) and() adhesive material(粘合材料).(.) We(我们) only() optimized(优化) our(我们的) CMF(CMF) material(材料) and() replaced(替换) the steel plate(钢板) in(in) standard(标准) vehicle(车辆) armor(装甲) with(with) steel()-()steel() CMF(CMF) armor(装甲).(.) There(There) is(is) additional(更多的) work(工作) we(我们) could(可以) do(do) to(to) make(make) it() even(变得) better(更好).(.) For example(例如),(,) we(我们) would(希望) like(like) to(to) optimize(优化) the adhesion(附着力) and() thickness(厚度) of(of) the ceramic(陶瓷),(,) CMF(CMF) and() aluminum layers(铝层),(,) which(which) may(可能) lead to(导致) even() lower(更低) total weight(总重量) and() improved(改善) efficiency(效率) of(of) the final(最终) armor(装甲)."(.")
In previous work(在之前的工作中),(,) Rabiei(Rabiei) and() her(她的) collaborators(合作者) demonstrated(证明) that(that) CMF(CMF) could(可以) block(阻止) blast pressure(爆炸压力) and() fragmentation(碎片) at(at) 5,000(5,000) feet(英尺) per second(每秒) from(from) high explosive(爆炸性) incendiary(燃烧) rounds() detonating(引爆) only() 18(18) inches(英寸) away(距离).(.) Her(她的) team(团队) also() showed(表明) that(that) CMF(CMF) could(可以) stop(阻止) a(a) 7.62(7.62) x(x) 63(63) millimeter(毫米) M2(M2) armor piercing(穿甲) projectile() at(at) a(a) total() thickness(厚度) of(of) less than(小于) an(1) inch(英寸),(,) while() the indentation(压痕) on(on) the back(背部) was(was) less than(小于) 8(8) millimeters(毫米).(.) For context(因此),(,) the National(国家) Institute(研究所) of(of) Justice(司法) standard(标准) allows(允许) up() to(to) 44(44) millimeters(毫米) indentation(压痕) in(in) the back(背面) of(of) armor(装甲).(.)
In addition(此外),(,) Rabiei(Rabiei)'s('s) group(小组) has(has) shown(证明) that(that) CMFs,(CMFs,) in addition to(除了) being(being) lightweight(重量轻),(,) are(are) very(非常) effective(有效) at(at) shielding(屏蔽) X-(X-)rays(射线),(,) gamma rays(γ射线) and() neutron radiation(中子辐射)()and(并且) can(可以) handle(处理) fire(火焰) and() heat(热量) twice(两倍) as well as(以及) the plain(普通) metals(金属) they(它们) are(are) made(制成) of.(of.)
"In("简而言之) short(),(,) CMFs(CMFs) hold(hold) promise(承诺) for(for) a variety of(各种) applications(应用):(:) from() space exploration(太空探索) to(to) shipping(运输) nuclear waste(核废料),(,) explosives(爆炸物) and() hazardous materials(有害物质),(,) to(to) military(军事) and() security(安全) applications(应用) and() even(甚至) cars(汽车),(,) buses(公共汽车) and() trains(火车),"(,") Rabiei(CMF) says().(.)
The new() paper(论文),(,) "(")Ballistic(弹道) Performance(性能) of(of) Composite Metal(复合金属) Foam(泡沫) against(对抗) Large() Caliber(口径) Threats(威胁),"(,") is(is) published(发表) in(in) the journal(杂志) Composite(复合材料) Structures(结构).(.)

新闻订阅

  • 科学
  • 技术
  • 医学

新闻分享